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  • AERODYNAMICS  (1,162)
  • Chemical Engineering  (1,126)
  • GENERAL
  • unknown
  • 1985-1989  (1,042)
  • 1980-1984  (802)
  • 1965-1969  (621)
  • 1955-1959  (146)
  • 1945-1949  (12)
Collection
Keywords
Publisher
Years
Year
  • 11
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    An analysis of the allocation of federal budget resources as an indicator of national goals and priorities, part 2 (1969)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: United States budget for research and development in national programs
    Keywords: GENERAL
    Type: NASA-CR-100436 , BMI-NLVP-TR-69-1-PT-2
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 12
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    An analysis of the allocation of federal budget resources as an indicator of national goals and priorities, part 1 (1969)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Research and development budget allocations in space program planning
    Keywords: GENERAL
    Type: NASA-CR-100435 , BMI-NLVP-TR-69-1-PT-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 13
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    Nonequilibrium hypersonic flow past smooth symmetric bodies. (1968)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Inviscid hypersonic flow with finite rate chemistry about axisymmetric bodies calculated using Maslen approximation
    Keywords: AERODYNAMICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 14
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    Finite-volume scheme for transonic potential flow about airfoils and bodies in an arbitrarily-shaped channel (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A conservative finite-volume difference scheme is developed for the potential equation to solve transonic flow about airfoils and bodies in an arbitrary channel. The scheme employs a mesh which is a nearly-conformal 'O' mesh about the airfoil and nearly orthogonal at the channel walls. The mesh extends to infinity upstream and downstream, where the mapping is singular. Special procedures are required to treat the singularities at infinity, including computation of the metrics near those points. Channels with exit areas different from inlet areas are solved; a body with a sting mount is an example of such a case.
    Keywords: AERODYNAMICS
    Type: Symposium on Numerical and Physical Aspects of Aerodynamic Flows; Jan 21, 1985 - Jan 24, 1985; Long Beach, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 15
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    PAN AIR - A higher order panel method for predicting subsonic or supersonic linear potential flows about arbitrary configurations (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: PAN AIR is a computer program for predicting subsonic or supersonic linear potential flow about arbitrary configurations. It uses linear source and quadratic doublet strength distributions. These higher-order distributions have been implemented in a manner that greatly reduces the numerical stability problems that have plagued earlier attempts to make surface paneling methods work successfully for supersonic flow. PAN AIR's problem-solving capability, numerical approach, modeling features, and program architecture are described. Numerical results are presented for a variety of geometries at supersonic Mach numbers.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 81-1255 , Fluid and Plasma Dynamics Conference; Jun 23, 1981 - Jun 25, 1981; Palo Alto, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 16
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    Boundary layer stability analysis of a natural laminar flow glove on the F-111 TACT airplane (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A natural laminar flow airfoil has been developed as a part of the aircraft energy efficiency program. A NASA flight program incorporating this airfoil into partial wing gloves on the F-111 TACT airplane was scheduled to start in May, 1980. In support of this research effort, an extensive boundary layer stability analysis of the partial glove has been conducted. The results of that analysis show the expected effects of wing leading-edge sweep angle, Reynolds number, and compressibility on boundary layer stability and transition. These results indicate that it should be possible to attain on the order of 60% laminar flow on the upper surface and 50% laminar flow on the lower surface for sweep angles of at least 20 deg, chord Reynolds numbers of 25 x 10 to the 6th and Mach numbers from 0.81 to 0.85.
    Keywords: AERODYNAMICS
    Type: Symposium on Viscous flow drag reduction; Nov 07, 1979 - Nov 08, 1979; Dallas, TX
    Format: text
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    NASA TECHNICAL REPORTS
  • 17
    Electronic Resource
    Electronic Resource
    Computer generation of reaction schemes and rate equations for thermal cracking (1988)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 34 (1988), S. 17-24 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Reaction schemes for the thermal cracking of paraffins, naphthenes, olefins, and aromatics, and the associated rate equations, are generated by an algorithm based upon Boolean relation matrices. In order to reduce calculation times for the heavier components, a self-learning system is introduced. This self-learning system avoids repetition of identical calculations by recognizing intermediate species, for which the reaction schemes have already been generated. The software includes routines for standardizing the representation of the species, an information retrieval system, and libraries containing the necessary information for recognition of the species and the reaction schemes for these species.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690340104
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    Paper (German National Licenses)
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  • 18
    Electronic Resource
    Electronic Resource
    Letters to the editor (1988)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 34 (1988), S. 1931-1936 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690341124
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    Paper (German National Licenses)
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  • 19
    Electronic Resource
    Electronic Resource
    Flooding, holdup, and drop size measurements in a multistage column extractor (1988)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 34 (1988), S. 283-292 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The hydrodynamics of a pilot plant multistage mixer column extractor was studied for the toluene/water physically equilibrated system. The effects of rotational speed, and continuous and dispersed phase flow rates were investigated under a variety of operating conditions. Dispersed phase axial holdup profiles, determined by a noninvasive ultrasonic method, showed a strong nonuniformity. Depending on the operating conditons, holdup profiles can change from a concave shape to a sigmoidal form with a maximum in the bottom of the column. Sauter mean diameter and drop size distribution profiles are strongly affected by rotational speed. Significant, but weaker, are the effects of continuous and dispersed phase flow rates. Continuous monitoring of the holdup profile in the proximity of flooding leads to the formulation of proper criteria for the prediction of flooding. These criteria are appropriate for models allowing for axial variation of the holdup along the contactor.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690340212
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    Paper (German National Licenses)
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  • 20
    Electronic Resource
    Electronic Resource
    Interactions of precipitation/dissolution waves and ion exchange in flow through permeable media (1986)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 32 (1986), S. 751-764 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This paper describes reactive flow in permeable media based on a numerical model that assumes local thermodynamic equilibrium. The model simulates single-phase, one-dimensional flow with greater generality than any model in the current literature. The mathematical foundation for the formulation is discussed in some detail. Results for hypothetical examples demonstrate that ion exchange and precipitation/dissolution of solids can interact to produce wave behavior not possible with either phenomenon alone. An important application involving both ion exchange and precipitation/dissolution is alkaline flooding. Model predictions for several laboratory alkaline floods indicate that the assumption of equilibrium is justified for these experiments. Simple calculations based on the equilibrium theory provide estimates of pH loss and hydroxide penetration distance.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690320505
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    Paper (German National Licenses)
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