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  • Chemistry  (1,632)
  • Aircraft Propulsion and Power  (6)
  • 1985-1989
  • 1950-1954  (1,638)
  • 1945-1949
  • 1952  (1,638)
Collection
Publisher
Years
  • 1985-1989
  • 1950-1954  (1,638)
  • 1945-1949
Year
  • 1
    Publication Date: 2019-07-12
    Description: An investigation to increase the compressor surge-limit pressure ratio of the XJ40-WE-6 turbojet engine at high equivalent speeds was conducted at the NACA Lewis altitude wind tunnel. This report evaluates the compressor modifications which were restricted to (1) twisting rotor blades (in place) to change blade section angles and (2) inserting new stator diaphragms with different blade angles. Such configuration changes could be incorporated quickly and easily in existing engines at overhaul depots. It was found that slight improvements in the compressor surge limit were possible by compressor blade adjustment. However, some of the modifications also reduced the engine air flow and hence penalized the thrust. The use of a mixer assembly at the compressor outlet improved the surge limit with no appreciable thrust penalty.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-RM-SE52G03
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  • 2
    Publication Date: 2019-07-11
    Description: An investigation was conducted at simulated high-altitude flight conditions to evaluate the use of compressor evaporative cooling as a means of turbojet-engine thrust augmentation. Comparison of the performance of the engine with water-alcohol injection at the compressor inlet, at the sixth stage of the compressor, and at the sixth and ninth stages was made. From consideration of the thrust increases achieved, the interstage injection of the coolant was considered more desirable preferred over the combined sixth- and ninth-stage injection because of its relative simplicity. A maximum augmented net-thrust ratio of 1.106 and a maximum augmented jet-thrust ratio of 1.062 were obtained at an augmented liquid ratio of 2.98 and an engine-inlet temperature of 80 F. At lower inlet temperatures (-40 to 40 F), the maximum augmented net-thrust ratios ranged from 1.040 to 1.076 and the maximum augmented jet-thrust ratios ranged from 1.027 to 1.048, depending upon the inlet temperature. The relatively small increase in performance at the lower inlet-air temperatures can be partially attributed to the inadequate evaporation of the water-alcohol mixture, but the more significant limitation was believed to be caused by the negative influence of the liquid coolant on engine- component performance. In general, it is concluded that the effectiveness of the injection of a coolant into the compressor as a means of thrust augmentation is considerably influenced by the design characteristics of the components of the engine being used.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-RM-E52F20
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  • 3
    Publication Date: 2019-07-10
    Description: An investigation was made of the performance of nine conical cooling-air ejectors at primary jet pressure ratios from 1 to 10, secondary pressure ratios to 4.0, and a temperature ratio of unity. This phase of the investigation was limited to conical ejectors having shroud exit to primary nozzle exit diameter ratios of 1.06 and 1.40, with several spacing ratios for each. The experimental results indicated that the pumping range and amount of cooling-air flow obtained with a 1.06 diameter ratio ejector were relatively small for cooling purposes but that the maximum possible thrust loss, which occurred with no secondary flow, was only 7 percent of convergent nozzle thrust. The 1.40 diameter ratio ejector produced a large cooling air flow and showed a possible thrust loss of 29.5 percent with no cooling air flow. Thrust gains were attained with ejectors of both diameter ratios at secondary pressure ratios greater than 1.0. The limiting primary pressure ratio below which an ejector can operate at a specific secondary pressure ratio (cut-off point) may be estimated for various flight conditions from data contained herein.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-RM-E52F26
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  • 4
    Publication Date: 2019-07-12
    Description: The stator-blade angles in the twelfth to fifteenth stages of a 16-stage high-pressure-ratio axial-flow compressor were decreased 3 deg The over-all performance of this compressor is compared with the performance of the same compressor with standard blade angles. The matching characteristics of the modified compressor and a two-stage turbine were also obtained and compared with those of the compressor with the original blade angles and the same turbine.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-RM-E51L03
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  • 5
    Publication Date: 2019-07-12
    Description: A theoretical method for evaluating the stability characteristics and the amplitude and the frequency of pulsation of ram-jet engines without heat addition is presented herein. Experimental verification of the theoretical results are included where data were available. Theory and experiment show that the pulsation amplitude of a high mass-flow-ratio diffuser having no cone surface flow separation increases with decreasing mass flow. The theoretical trends for changes in amplitude, frequency, and mean-pressure recovery with changes in plenum-chamber volume were experimentally confirmed. For perforated convergent-divergent-type diffusers, a stability hysteresis loop was predicted on the pressure-recovery mass-flow-ratio curve. At a given mean mass-flow ratio, the higher.value of mean pressure recovery corresponded to oscillatory flow in the diffuser while the lower branch was stable. This hysteresis has been observed experimentally. The theory indicates that for a ram-jet engine of given diameter, the amplitude of pulsation of a supersonic diffuser is increased by decreasing the relative size of the plenum chamber with respect to the diffuser volume down to a critical value at which oscillations cease. In the region of these critical values, the stable mass-flow range of the diffuser may be increased either by decreasing the combustion chamber volume or by increasing the length of the diffuser.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-RM-E52I24
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  • 6
    Publication Date: 2019-07-12
    Description: An investigation of the effect of inlet pressure, corrected engine speed, and turbine temperature level on turbine-inlet gas temperature distributions was conducted on a J40-WE-6, interim J40-WE-6, and prototype J40-WE-8 turbojet engine in the altitude wind tunnel at the NAC.4 Lewis laboratory. The engines were investigated over a range of simulated pressure altitudes from 15,000 to 55,000 feet, flight Mach numbers from 0.12 to 0.64, and corrected engine speeds from 7198 to 8026 rpm, The gas temperature distribution at the turbine of the three engines over the range of operating conditions investigated was considered satisfactory from the standpoint of desired temperature distribution with one exception - the distribution for the J40-WE-6 engine indicated a trend with decreasing engine-inlet pressure for the temperature to exceed the desired in the region of the blade hub. Installation of a compressor-outlet mixer vane assembly remedied this undesirable temperature distribution, The experimental data have shown that turbine-inlet temperature distributions are influenced in the expected manner by changes in compressor-outlet pressure or mass-flow distribution and by changes in combustor hole-area distribution. The similarity between turbine-inlet and turbine-outlet temperature distribution indicated only a small shift in temperature distribution imposed by the turbine rotors. The attainable jet thrusts of the three engines were influenced in different degrees and directions by changes in temperature distributions with change in engine-inlet pressure. Inability to match the desired temperature distribution resulted, for the J40-WE-6 engine, in an 11-percent thrust loss based on an average turbine-inlet temperature of 1500 F at an engine-inlet pressure of 500 pounds per square foot absolute. Departure from the desired temperature distribution in the Slade tip region results, for the prototype J40-WE-8 engine, in an attainable thrust increase of 3 to 4 percent as compared with that obtained if tip-region temperature limitations were observed.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-RM-E52H06
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  • 7
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    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 24 (1952) 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 8
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 1-2 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird ein Verfahren beschrieben, die wirksame Oberfläche eines Katalysators ohne Behinderung des Gastransportes zu erhöhen durch Aufbringen des katalysierenden Stoffes in Pulverform auf impräginerte Körner ohne Beimischung eines Bindemittels und ohne mechanischen Druck. Die Katalysatoren sind schüttfest. Sechs Beispiele mit vergleichenden Versuchen an großtechnisch wichtigen Prozessen zeigen eine um ein Vielfaches erhöhte Ausbeute.
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  • 9
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Das Aufzeigen der Merkmale im Aufbau von Zerstäubungstrocknern führt zu einer Betrachtung der Abmessungen der Teilchen, aus denen das Trockenpulver besteht. Mikroaufnahmen lassen die verschiedenen Einflüsse auf die Teilchengröße erkennen. Letztere legt ihreseits die Größe der Wärmeund Stoffaustauschzahlen fest. Das Hauptergebnis dieser theoretischen Untersuchungen ist die Trockenzeit. Je nach Teilchenabmessung schwankt sie zwischen Bruchteilen und einer Vielzahl von Sekunden. Auch der Betriebsmittelverbrauch wird untersucht; es wird gezeigt, wie der Wärmeverbrauch erniedrigt werden kann.
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  • 10
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 22-25 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In den bis jetzt in der amerikanischen Literatur veröffentlichten beiden Enthalpie - Diagrammen wird nicht das metrische Maßsystem angewendet oder sie umfassen nicht das ganze Gebiet des Systems Wasser-Schwefelsäure-Schwefeltrioxyd. Außerdem ist die Genauigkeit der Enthalpiewerte schwer zu beurteilen, da die Verfasser die Auswertung der experimentellen Daten nicht erklären. Im folgenden wird nun über die Berechnung und Konstruktion eines Enthalpie-Diagramms im metrischen Maßsystem über das gesamte Gebiet des Systems ausführlich berichtet, und Fehlergrenzen werden angegeben.
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  • 11
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 32-36 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 12
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 36-41 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 13
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird über die Arbeiten dreier Autoren berichtet, die möglichst einfache Formen der Dispersoidanalyse für technische Zwecke entwickelt haben. Zwei Arbeiten befassen sich mit der Verbesserung oder Vereinfachung bekannter Methoden, die auf der Sedimentation von Dispersoiden in Flüssigkeiten bzw. der Messung der Durchlässigkeit des aufgehäuften Materials beruhen. Die dritte Arbeit benutzt die Dispersion des Lichts in Abhängigkeit von der Teilchengröße, den sog. Mie-Effekt, und verspricht bei Einsatz entsprechender optischer Mittel eine fast augenblickliche Messung, die auch die Bildung oder Veränderung von Dispersionen zu verfolgen gestatten würde.
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  • 14
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 41-42 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 15
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 42-44 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
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  • 16
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 45-46 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
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  • 17
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 47-49 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 18
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 49-50 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 19
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 58-59 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 20
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 60-81 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird an Hand von Photographien ein Überblick über das Verhalten von mit Gasen oder Flüssigkeiten aufgeströmten, gekörnten Schüttgütern gegeben. Auf Grund der vorliegenden Literatur und eigener Arbeiten werden quantitative Angaben gemacht über die Größe des Druckabfalles in Wirbelschichten, die minimalen und maximalen Geschwindigkeiten, bei denen eine Wirbelschicht noch beständig ist, und über die Schichtausdehnung infolge der Wirbelbewegung des gekörnten Gutes. Weitere Angaben folgen über die Viscosität in Wirbelschichten, den Böschungswinkel sowie den Stoff- und Wärmetransport, den Abrieb des wirbelnden Kornmaterials, die Erosion der Apparatewände sowie über chemische Umsetzungen in Wirbelschichten.
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  • 21
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In der vorliegenden Arbeit werden Aufströmungseigenschaften und hydrodynamische Zustände mit Luft aufgewirbelter Partikelschichten untersucht. Anschliεßend wird eine Versuchsanordnung und Methode für Wärmeübergangs-Messungen in solchen Schichten im Vergleich zu ruhenden Schüttungen behandelt und eine Deutung der Versuchsergebnisse gegeben.
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  • 22
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 92-92 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird die Formulierung des Winkler-Verfahrens in deutschen und amerikanischen Patentschriften erörtert, wobei wesentlich ist, daß die Vergasung in einer bewegten Schicht stattfindet.
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  • 23
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 93-97 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Eine Schicht von losem, feinkörnigem Schüttgut läßt sich in einem Behälter durch eine richtig dosierte Gasströmung in einen beweglichen Zustand versetzen. Die Schicht verhält sich dann ähnlich wie eine Flüssigkeit. Es werden Untersuchungen und Verfahren beschrieben, denen das Prinzip der Wirbelschicht zugrunde liegt.
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  • 24
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 110-114 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 25
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 129-135 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Aus dem bei der Badischen Anilin-& Soda-Fabrik, Ludwigshafen, entwickelten Spiralwindsichter entstand durch die Einführung rotierender Sichtraumwände, einer sich automatisch der Trenngrenze anpassenden Grobgutspülung und nach sorgfältiger konstruktiver Durcharbeitung eine betriebsreife Maschine. Bei dieser Entwicklung wurden neue Erkenntnisse über die Definition der Korngröße und das Ansatzverhalten von Feinstäuben gewonnen. Die vermutliche Weiterentwicklung wird abschließend skizziert.
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  • 26
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Den zahlreichen Vorschlägen zur wirtschaftlichen Bewertung von Wärmeübertragern wird die Anregung entgegengestellt, die Kosten für den Gesamtaufwand an Rohrlänge zur wichtigsten Grundlage einer wirtschaftlichen Bewertung verschiedener Gestaltungen zu machen. Die Vergleiche werden für Längsstrom in Rohren und für Querstrom durch Rohrbündel mit Einschluß berippter Rohre in einheitlicher und systematischer Weise durchgeführt. Besonders bei niedrigen Re-Zahlen erweisen sich Querstrom-Anordnungen mit engen Rohrabständen als wirtschaftlich überlegen.
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  • 27
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 156-157 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Um die Betriebssicherheit und Lebensdauer von Vakuumpumpen zu erhöhen, kann ein Staubfilter vorgeschaltet werden. Hierfür lassen sich ein U-Rohrfilter bzw. ein Öl-Umlauffilter, die mit trockenen bzw. ölbenetzten Raschig-Ringen gefüllt sind, verwenden.
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  • 28
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 160-163 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
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  • 29
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 165-165 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 158-159 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Bei der Auswertung photographisch aufgenommener Spektren sowie der intensitätsmäßigen Auswertung von Röntgenaufnahmen, speziell von Faseraufnahmen und diffusen Streukurven, muß man die vom Registrierphotometer gelieferte Kurve auf Intensität bzw. Schwärzung umwerten. Es wird ein aus einfachen Mitteln herstellbarer Apparat angegeben, der dies mechanisch ausführt und sich gut bewährt hat.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 163-165 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 166-168 
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    Keywords: Chemistry ; Industrial Chemistry
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 165-166 
    ISSN: 0009-286X
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 169-169 
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    Keywords: Chemistry ; Industrial Chemistry
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 169-170 
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    Keywords: Chemistry ; Industrial Chemistry
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 170-170 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 171-172 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 220-221 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 216-220 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 234-236 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 229-230 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 237-247 
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    Notes: Berichtet wird über wesentliche Fortschritte der Fischer-Tropsch-Synthese mit festangeordnetem Katalysator. Die Entwicklung hochaktiver Eisen-Katalysatoren und Aufklärung wichtiger Fragen der Reaktionskinetik und des Wärmetransportes in den Reaktoren ermöglichte erhebliche Erhöhung der Ausbeute und Qualität der Produkte und technische Verbesserung der Synthese-Anlagen, so daß die Wirtschaftlichkeit des Fischer-Tropsch-Prozesses unter sehr verschiedenartigen Bedingungen gegeben ist. Erstmalig werden zusammenfassende Mitteilungen über die Qualität der aus diesen Produkten von der Ruhrchemie großtechnisch hergestellten synthetischen Schmieröle gemacht.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 262-271 
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    Notes: Die Schwingungstechnik hat in den letzten Jahren auch in der chemischen Industrie ständig an Bedeutung gewonnen. Einmal ergaben sich in vorhandenen Anlagen bei Erweiterungen Schwierigkeiten, so daß man auf neue Erkenntnisse der Schwingungstechnik angewiesen war, zum anderen aber wollte man auch bei Neuplanungen die Vorteile schwingungstechnischer Gründung von Maschinen von vornherein ausnutzen. Im folgenden wird eine Übersicht gegeben über die sich bietenden Probleme und deren praktische Lösungen, wie sie mit Erfolg bereits verwirklicht sind oder z. Zt. verwirklicht werden.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 272-277 
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    Notes: Im folgenden werden die Grundzüge der Physik der Festkörper, soweit sie zum Verständnis der Pulverdispersoide notwendig sind, behandelt. Der Einfluß von mechanischem Zerkleinerungsgrad, Eigengewicht, Kristallstruktur und -oberfläche auf das Verhalten von Pulvern wird dargelegt.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 277-283 
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    Notes: Am Beispiel des Penicillin wird die großtechnische Herstellung der Antibiotika behandelt. Besonderheiten, die sich für die Reinigung von Streptomycin und Aureomycin aus ihren chemischen Eigenschaften ergeben, werden berücksichtigt.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 284-288 
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    Notes: Zur Untersuchung von Sedimentations-, Elektrophorese- und Diffusionsvorgängen wurde ein lichtstarkes Meßverfahren nach der Interferenzmethode entwickelt, das den Vorteil der hohen Lichtstärke einer Jaminschen Anordnung des Planparallelplatten - Interferometers gegenüber dem Doppelspalt-Interferometer voll ausnutzt, indem als optisches Zusatzglied zwei gewinkelte gleichdicke Planparallelplatten angefügt werden. Ein Gerät zur Messung der Diffusionskonstanten wird beschrieben.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 327-328 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 321-325 
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    Notes: In der Verfahrenstechnik spielen rheologische Einflüsse eine bedeutende Rolle. An Beispielen aus der Reyon- und Zellwollindustrie wird gezeigt, daß u. a. die Spinnlösung in den verschiedenen verfahrenstechnischen Stufen ein unterschiedliches Verhalten aufweist. Durch eine rheologische Betriebskontrolle können der Fabrikationsprozeß überwacht und Aussagen über die Qualität des Ausgangsproduktes und der Fertigprodukte gemacht werden.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 339-347 
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    Notes: An Hand einiger Beispiele der Praxis wird Stellung genommen zur Frage, welche Faktoren bei bestimmten, mit etwa atmosphärischen Drucken betriebenen Gaserzeugertypen die Zusammensetzung der Vergasungsgase beeinflussen.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 349-352 
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    Notes: Auf Grund neuerer experimenteller Ergebnisse englischer und russischer Autoren werden unter Heranziehung eigener reaktionskinetischer Untersuchungen die vermutlichen Elementarreaktionen der aus den Experimenten folgenden drei Reaktionsstufen der Kohleverbrennung Cfest + ½ O2 = CO; CO + ½ O2 = CO2; CO2 + Cfest = 2 CO aufgestellt. Es wird versucht, aus dem Elementarablauf die experimentellen Befunde abzuleiten und verständlich zu machen. Die Vorgänge bei der Vergasung der Kohle sowie Fragen der Energieverteilung zwischen Festkörper und Gas werden diskutiert.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 348-348 
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    Notes: Es wird ein Ofen beschrieben, der zum Ausglühen von Kupferoxyd für die Stickstoff-Bestimmung nach Dumas gebraucht wird, sich aber auch zum Ausglühen von körnigen Substanzen in beliebigem Gasstrom eignet.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 359-364 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 353-357 
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    Notes: An Hand einer umfangreichen Tabelle wird gezeigt, daß sich das Guldbergsche Verhältnis ϑ = Ts/Tk für organische Verbindungen additiv aus Atom- und Gruppenwerten zusammensetzen läßt. Damit wird es möglich, die absolute kritische Temperatur Tk eines organischen Stoffes abzuschätzen, wenn dessen Siedetemperatur Ts bekannt ist.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 373-376 
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    Notes: Es wird ein lösbarer Hochdruckverschluß beschrieben, bei dem die Abdichtung durch einen Kupferring bewirkt wird. Sodann wird der Kraftfluß durch den Kupferring ermittelt sowie die durch die Abdichtung bewirkte Biegespannung im Behälter.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 389-392 
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    Notes: Es wird gezeigt, daß die im Betriebe von Spinnbadeindampfern fallweise auftretenden, schwer entfernbaren Verkrustungen der Heizrohre im wesentlichen durch die Ausscheidung von Glauberit verursacht werden. Verschiedene Einflüsse, die die Bildung des Doppelsalzes begünstigen, werden aufgeklärt.
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    Notes: Durch Anwendung eines temperaturkompensierten Aräometers nach Neubauer wird eine sehr genaue und schnelle Gehaltsbestimmung rauchender Schwefelsäure möglich. Weitere Anwendungen des neuen Gerätes werden kurz erörtert.
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    Notes: Es werden behandelt die Abhängigkeit der Kolonnenbelastung vom Differenzdruck für verschiedene Füllkörper und verschiedene Einsatzprodukte, die Belastung bei vermindertem Druck, die Wirksamkeit verschiedener Füllkörper in Abhängigkeit von der Belastung und der günstigste Belastungsbereich.
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    Notes: Es wird über die Entwicklung im Bau von Hochdruckgefäßen, Verschlußvorrichtungen, Armaturen, Pumpen und Verdichtern sowie Meßgeräten berichtet.
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    Notes: An einer Universal-Versuchseinrichtung gewonnene neue Versuchsergebnisse werden zusammenfassend mitgeteilt. Sie betreffen das Kondensieren, Verdampfen, Erwärmen und Kühlen. Für kondensierenden Wasserdampt gestatten die Messungen einen Vergleich zwischen Theorie und Wirklichkeit einerseits und zwischen Film- sowie Tropfenkondensation andererseits. Enthält der Dampf Luft, dann ist für die Vorausberechung eine zweckentsprechende Deutung des hydraulischen Durchmessers unerläßlich. Für diese wird ein Beitrag geliefert. Die am senkrechten Versuchsrohr gemessenen Wandtemperaturen gestatten, die Wärmeübergangszahl zwischen Rohrwand und im Rohr wahlweise bei auf- und abwärts strömendem Wasser zu messen. Infolge Eigenkonvektion ergeben sich bei kleinen Geschwindigkeiten in beiden Fällen unerwartet hohe Unterschiede gegenüber den bekannten Gleichungen. Überraschend sind aber die jetzt erstmalig bekanntgegebenen Beobachtungen über den Einfluß des Schämens auf den Wärmeübergang im senkrechten Verdampferrohr. Das Schäumen erhöht den Wärmeübergang von Lösungen im selben Maß wie die Tropfenbildung beim Kondensieren von Wasserdampf.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 428-429 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 429-436 
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    Chemie Ingenieur Technik - CIT 24 (1952) 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 437-443 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Nach Erörterung der Grundlagen der Regeltechnik werden die wichtigsten im chemischen Betrieb verwendeten Regeleinrichtungen an Hand einfacher Beispiele in ihrer grundsätzlichen Arbeitsweise besprochen.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 444-446 
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    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Der Wärmeübergang durch die wandnahe Zone ist in aufgewirbelten Partikelschichten im Vergleich zu gasdurchströmten Leerrohren sehr groß. Es wird eine Deutung des Mechanismus des Wärmetransportes angegeben. Der Wärmedurchgang durch die gesamte Schicht und der Anteil der effektiven Wärmeleitfähigkeit im Schichtinnern werden diskutiert. Die Einflußgrößen für den Wärmeübergang  -  Gasgeschwindigkeit, Partikelgröße, physikalische Eigenschaften von Partikeln und Gas, Schüttdichte und Schichtabmessungen  -  werden durch eine empirische Gleichung wiedergegeben. Auf den Einfluß der Gleichmäßigkeit der Schichtaufwirbelung wird eingegangen.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 447-451 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Der Druckzuwachs in einem geschlossenen Flüssigkeitsbehälter bei Temperatursteigerung folgt solange der Dampfdruckkurve, bis die sich thermisch ausdehnende Flüssigkeit den Behälter vollständig füllt. Bei weiterer Temperaturerhöhung steigt der Druck erheblich steiler. Sein Endwert ist vom Füllungsgrad bei der Anfangstemperatur und von der Nachgiebigkeit des Behälters abhängig. Der Füllungsgrad kann bei Behältern für Propan und Butan, die ohne Gewichtskontrolle gefüllt werden, 100% erreichen. Aus sicherheitstechnischen Gründen ist die Kenntnis der unter diesen Umständen auftretenden Höchstdrucke von Bedeutung.
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    Notes: Durch Benutzung einer hahnlosen Bürette wird die Ablesung des Gasvolumens sehr erleichtert. Die beschriebenen Änderungen werden stets vorteilhaft sein, wenn ein Gas volumetrisch bestimmt werden soll, das mit einer stark gefärbten oder einer mit Hahnfett reagierenden bzw. Niederschlag abscheidenden Flüssigkeit in Berührung steht.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 466-469 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 463-466 
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    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 457-462 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wird eine Gleichung abgeleitet, die für ein Mineralöl und ein Verdünnungsmittel jenes Mischungsverhältnis ergibt, bei welchem die Mischung die kürzeste Filtrationszeit aufweist. Für die numerische Auswertung wurde ein Nomogramm ausgearbeitet, in dem die optimale Verdünnung aus der Viscosität des zu filtrierenden Öles und jener des Verdünnungsmittels unmittelbar abgelesen werden kann.
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 455-456 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Der Gedanke, daß ein schnell anzeigendes Viscosimeter auch die Änderung der Reibungsverhältnisse in einer Flüssigkeit bei Fällungsreaktionen wiedergeben müsse, führte zu Endpunktbestimmungsversuchen bei Fällungstitrationen. Über die Ergebnisse wird im folgenden berichtetVorgetragen auf der Ersten Deutschen Rheologentagung am 5. Oktober 1951 in Berlin..
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 469-469 
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    Keywords: Chemistry ; Industrial Chemistry
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 470-472 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 473-473 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 474-474 
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    Chemie Ingenieur Technik - CIT 24 (1952), S. 474-475 
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    Source: Wiley InterScience Backfile Collection 1832-2000
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