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  • 1
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    Three-dimensional transonic potential flow about complex 3-dimensional configurations (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An analysis has been developed and a computer code written to predict three-dimensional subsonic or transonic potential flow fields about lifting or nonlifting configurations. Possible condfigurations include inlets, nacelles, nacelles with ground planes, S-ducts, turboprop nacelles, wings, and wing-pylon-nacelle combinations. The solution of the full partial differential equation for compressible potential flow written in terms of a velocity potential is obtained using finite differences, line relaxation, and multigrid. The analysis uses either a cylindrical or Cartesian coordinate system. The computational mesh is not body fitted. The analysis has been programmed in FORTRAN for both the CDC CYBER 203 and the CRAY-1 computers. Comparisons of computed results with experimental measurement are presented. Descriptions of the program input and output formats are included.
    Keywords: AERODYNAMICS
    Type: NASA-CR-3814 , NAS 1.26:3814 , D6-52329
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Computation of transonic potential flow about 3 dimensional inlets, ducts, and bodies (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An analysis was developed and a computer code, P465 Version A, written for the prediction of transonic potential flow about three dimensional objects including inlet, duct, and body geometries. Finite differences and line relaxation are used to solve the complete potential flow equation. The coordinate system used for the calculations is independent of body geometry. Cylindrical coordinates are used for the computer code. The analysis is programmed in extended FORTRAN 4 for the CYBER 203 vector computer. The programming of the analysis is oriented toward taking advantage of the vector processing capabilities of this computer. Comparisons of computed results with experimental measurements are presented to verify the analysis. Descriptions of program input and output formats are also presented.
    Keywords: AERODYNAMICS
    Type: NASA-CR-3514 , D6-49848
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A multi-grid code for 3-D transonic potential flow about axisymmetric inlets at angle of attack (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: In the present work, an existing transonic potential code is adapted to utilize the Multiple Level Adaptive technique proposed by A. Brandt. It is shown that order of magnitude improvements in speed and greatly improved accuracy over the unmodified code are achieved. Consideration is given to the difficulties of multi-grid programming, and possible future applications are surveyed.
    Keywords: AERODYNAMICS
    Type: AIAA PAPER 80-1365 , Fluid and Plasma Dynamics Conference; Jul 14, 1980 - Jul 16, 1980; Snowmass, CO
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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