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  • 1
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Chemie der Metallcarbonyle in flüssigem Ammoniak. I. Über die Reaktionen der Carbonyle des Eisens und Kobalts mit Alkalimetallen (1955)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 281 (1955), S. 190-198 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die monomeren und mehrkernigen reinen Carbonyle des Eisens und Kobalts lassen sich durch Lösungen von Alkalimetallen in flüssigem Ammoniak leicht zu den betreffenden Carbonylmetallaten reduzieren. Die Reaktionen werden durch Bestimmung der verbrauchten Alkalimetallmengen, der gebildeten Carbonylmetallate sowie der bei den Reaktionen freiwerdenden Gase quantitativ untersucht.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19552810309
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Über EisengallustinteProfessor Hans-Georg von Schnering zum 60. Geburtstage gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 598 (1991), S. 371-376 
    Details
    ISSN: 0044-2313
    Keywords: Iron gallic ink ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Iron Gallic InkFrom Iron(III) chloride and gallic acid in gels single crystals could be obtained which will be the dye-stuff of iron gallic ink. The structure consists of a hexagonal iron gallic acid 1:1 framework. The oxidation state three of the iron could be confirmed by Mössbauer and XANES spectroscopy.
    Notes: Durch Kristallisation in Gelen erhält man aus Gallussäure und Eisen(III)-chlorid Einkristalle, die einen der wesentlichen Farbstoffe der Eisengallustinte darstellen dürften. Die Struktur besteht aus einem hexagonalen Gallussäure-Eisen-1: 1-Gerüst, in dessen Kanälen Hydronium-Ionen den Ladungsausgleich bewirken. Die Oxidationsstufe drei des Eisens wurde mit Mössbauer- und XANES-Spektroskopie bestätigt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915980134
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Chemie der Metallcarbonyle in flüssigem Ammoniak. Über die Reaktionen der Hexacarbonyle der Chromgruppe mit Alkali- und Erdalkalimetallen (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 291 (1957), S. 122-130 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In Analogie zu der früher(1) beschriebenen Umsetzung von Fe(CO)5 mit Alkalimetallen im Ammonosystem, die zur Bildung von Tetracarbonylferrat(-II) führt, Fe(CO)6 + 2 Na → [Fe(CO)4]Na2 + CO, lassen sich auch die Hexacarbonyle der Chromgruppe zu tiefgelben edelgaskonfigurierten Pentacarbonylmetallaten(-II) reduzieren: Me(CO)6 + 2 Na → [Me(CO)5]Na2 + CO (Me = Cr, Mo, W).Diese besitzen  -  wie das Tetracarbonylferrat(7hyphen;II)  -  ein Molekül CO weniger als die betreffenden monomeren Metallcarbonyle.Die Reaktionen werden durch Bestimmung der verbrauchten Alkalimetalle und der bei den Umsetzungen freiwerdenden Gase quantitativ untersucht und die Eigenschaften der entstandenen Verbindungen beschrieben.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19572910113
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  • 4
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    Supersonic propulsion technology (1979)
    In:  CASI
    Details
    Publication Date: 2006-07-16
    Description: Propulsion concepts for commercial supersonic transports are discussed. It is concluded that variable cycle engines, together with advanced supersonic inlets and low noise coannular nozzles, provide good operating performance for both supersonic and subsonic flight. In addition, they are reasonably quiet during takeoff and landing and have acceptable exhaust emissions.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: Aeropropulsion 1979; p 345-386
    Format: text
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  • 5
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    Constitutive modeling for isotropic materials (HOST) (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The results of the first year of work on a program to validate unified constitutive models for isotropic materials utilized in high temperature regions of gas turbine engines and to demonstrate their usefulness in computing stress-strain-time-temperature histories in complex three-dimensional structural components. The unified theories combine all inelastic strain-rate components in a single term avoiding, for example, treating plasticity and creep as separate response phenomena. An extensive review of existing unified theories is given and numerical methods for integrating these stiff time-temperature-dependent constitutive equations are discussed. Two particular models, those developed by Bodner and Partom and by Walker, were selected for more detailed development and evaluation against experimental tensile, creep and cyclic strain tests on specimens of a cast nickel base alloy, B19000+Hf. Initial results comparing computed and test results for tensile and cyclic straining for temperature from ambient to 982 C and strain rates from 10(exp-7) 10(exp-3) s(exp-1) are given. Some preliminary date correlations are presented also for highly non-proportional biaxial loading which demonstrate an increase in biaxial cyclic hardening rate over uniaxial or proportional loading conditions. Initial work has begun on the implementation of both constitutive models in the MARC finite element computer code.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-174718 , SWRI-06-7576/13 , NAS 1.26:174718
    Format: application/pdf
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  • 6
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    Constitutive modeling for isotropic materials (HOST) (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The results of the third year of work on a program which is part of the NASA Hot Section Technology program (HOST) are presented. The goals of this program are: (1) the development of unified constitutive models for rate dependent isotropic materials; and (2) the demonstration of the use of unified models in structural analyses of hot section components of gas turbine engines. The unified models selected for development and evaluation are those of Bodner-Partom and of Walker. A test procedure was developed for assisting the generation of a data base for the Bodner-Partom model using a relatively small number of specimens. This test procedure involved performing a tensile test at a temperature of interest that involves a succession of strain-rate changes. The results for B1900+Hf indicate that material constants related to hardening and thermal recovery can be obtained on the basis of such a procedure. Strain aging, thermal recovery, and unexpected material variations, however, preluded an accurate determination of the strain-rate sensitivity parameter is this exercise. The effects of casting grain size on the constitutive behavior of B1900+Hf were studied and no particular grain size effect was observed. A systematic procedure was also developed for determining the material constants in the Bodner-Partom model. Both the new test procedure and the method for determining material constants were applied to the alternate material, Mar-M247 . Test data including tensile, creep, cyclic and nonproportional biaxial (tension/torsion) loading were collected. Good correlations were obtained between the Bodner-Partom model and experiments. A literature survey was conducted to assess the effects of thermal history on the constitutive behavior of metals. Thermal history effects are expected to be present at temperature regimes where strain aging and change of microstructure are important. Possible modifications to the Bodner-Partom model to account for these effects are outlined. The use of a unified constitutive model for hot section component analyses was demonstrated by applying the Walker model and the MARC finite-element code to a B1900+Hf airfoil problem.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-179522 , SWRI-7576/45 , NAS 1.26:179522
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Aeropropulsion in year 2000 (1980)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A sampling of probable future engine types, such as convertible engines for helicopters, turboprops for fuel-conservative airliners, and variable-cycle engines for supersonic transports are presented. Related technology improvements in propellers, materials, noise suppression, etc. are reviewed.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-81416 , E-335 , Global Technol. 2000, the 1980 Intern. Meeting of the Am. Inst. of Aeron. and Astronautics; May 05, 1980 - May 11, 1980; Baltimore
    Format: application/pdf
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  • 8
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    The NASA research program on propulsion for supersonic cruise aircraft (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The objectives and status of the propulsion portion of a program aimed at advancing the technology and establishing a data base appropriate for the possible future development of supersonic cruise aircraft are reviewed. Research related to exhaust nozzles, combustors, and inlets that is covered by the noise, pollution, and dynamics programs is described.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-X-71666 , E-8252 , Natl. Transportation Meeting; May 06, 1975 - May 09, 1975; Hartford, CT; United States
    Format: application/pdf
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  • 9
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    The NASA research program on propulsion for supersonic cruise aircraft (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Since 1972 NASA has pursued a program aimed at advancing the technology and establishing a data base appropriate for the possible future development of supersonic cruise aircraft. This paper briefly reviews the objectives and status of the propulsion portion of the program. Building upon a continuing series of propulsion system studies, research activities are under way in noise and pollution reduction, inlet stability, and materials.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: SAE PAPER 750629 , Society of Automotive Engineers, Air Transportation Meeting; May 06, 1975 - May 08, 1975; Hartford, CT
    Format: text
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  • 10
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    Rotor redesign for a highly loaded 1800 ft/sec tip speed fan. 1: Aerodynamic and mechanical design report (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A quasi three dimensional design system and multiple-circular-arc airfoil sections were used to design a fan rotor. An axisymmetric intrablade flow field calculation modeled the shroud of an isolated splitter and radial distribution. The structural analysis indicates that the design is satisfactory for evaluation of aerodynamic performance of the fan stage in a test facility.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-159596 , PWA-5523-42
    Format: application/pdf
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