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  • Analytical Chemistry and Spectroscopy  (901)
  • AERODYNAMICS  (569)
  • 1985-1989  (1,470)
  • 1980-1984
  • 1985  (1,470)
Collection
Keywords
Publisher
Years
  • 1985-1989  (1,470)
  • 1980-1984
Year
  • 11
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    An investigation of the tabbed vortex flap (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AERODYNAMICS
    Type: Journal of Aircraft (ISSN 0021-8669); 22; 490-497
    Format: text
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    NASA TECHNICAL REPORTS
  • 12
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    Assessment of preliminary prediction techniques for wing leading-edge vortex flows at supersonic speeds (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A theoretical investigation of the aerodynamics of sharp leading-edge delta wings at supersonic speeds has been conducted. The primary objective of this was to determine the applicability of existing theoretical methods to predict wing leading-edge separated-flow characteristics at conditions conductive to high-lift supersonic flight. Predicted results from two modified linear-theory methods (LTSTAR and VORCAM) are compared with experimental data. Comparison of the two methods for uncambered wings revealed that the LTSTAR code is in much better agreement with experimentally measured vortex strength, vortex position, and total lifting characteristics than the VORCAM code. Selected analysis was also performed with an Euler code, SWINT. The results of this study indicated that the SWINT code was not well suited to the analysis of wings with separated flow at high lift and low supersonic speeds.
    Keywords: AERODYNAMICS
    Type: Journal of Aircraft (ISSN 0021-8669); 22; 473-478
    Format: text
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    NASA TECHNICAL REPORTS
  • 13
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    Comparison of inviscid flow computations with flight data for the Shuttle orbiter (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AERODYNAMICS
    Type: Journal of Spacecraft and Rockets (ISSN 0022-4650); 22; 297-303
    Format: text
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    NASA TECHNICAL REPORTS
  • 14
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    The lateral surface drag coefficient of cylindrical spacecraft in a rarefied finite temperature atmosphere (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: In the present determination of the free molecule flow drag coefficient for a cylindrical spacecraft flying parallel to its principal axis, the lateral surface effects of thermal motion are explicitly included in terms of the average impact angle of the incident gas momentum vector. Kinetic theory is used to characterize self-shadowing, as well as to obtain an expression for the lateral surface coefficient in terms of the average impact angle of the incident momentum vector and the fractional momentum transfer along the line of impact. It is found that, for a length/diameter ratio of about 5, the lateral surface contribution to the drag coefficient is comparable to that of the front face.
    Keywords: AERODYNAMICS
    Type: AIAA Journal (ISSN 0001-1452); 23; 862-867
    Format: text
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    NASA TECHNICAL REPORTS
  • 15
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    Axisymmetric bluff-body drag reduction through geometrical modification (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The effect of shoulder radiusing and grooving (longitudinally and circumferentially) the afterbodies of bluff bodies to reduce the base drag at low speeds is investigated experimentally. Shoulder radii as large as 2.75 body diameters are examined. Reynolds number (ReD) based on body diameter varied from 20,000 to 200,000. Results indicate that increasing the shoulder radius to 2.00 body diameters can reduce the drag levels to those of a streamline body having 67 percent greater fineness ratio. For the relatively sharp shoulder case, body drag reductions as large as 50 and 33 percent are obtained using circumferential or longitudinal grooves, respectively.
    Keywords: AERODYNAMICS
    Type: Journal of Aircraft (ISSN 0021-8669); 22; 516-522
    Format: text
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  • 16
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    Measured and calculated airloads on a transport wing model (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AERODYNAMICS
    Type: Journal of Aircraft (ISSN 0021-8669); 22; 336-342
    Format: text
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    NASA TECHNICAL REPORTS
  • 17
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    Euler and Navier-Stokes solutions for supersonic shear flow past a circular cylinder (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AERODYNAMICS
    Type: AIAA Journal (ISSN 0001-1452); 23; 583-587
    Format: text
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    NASA TECHNICAL REPORTS
  • 18
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    Implicit Total Variation Diminishing (TVD) schemes for steady-state calculations (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The novel implicit and unconditionally stable, high resolution Total Variation Diminishing (TVD) scheme whose application to steady state calculations is presently examined is a member of a one-parameter family of implicit, second-order accurate systems developed by Harten (1983) for the computation of weak solutions for one-dimensional hyperbolic conservation laws. The scheme will not generate spurious oscillations for a nonlinear scalar equation and a constant coefficient system. Numerical experiments for a quasi-one-dimensional nozzle problem show that the experimentally determined stability limit correlates exactly with the theoretical stability limit for the nonlinear scalar hyberbolic conservation laws.
    Keywords: AERODYNAMICS
    Type: Journal of Computational Physics (ISSN 0021-9991); 57; 327-360
    Format: text
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    NASA TECHNICAL REPORTS
  • 19
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    Evaluation of a stalled airfoil analysis program (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The Stalled Airfoil Analysis Program (SAAP) is a computer code for predicting the aerodynamic characteristics of an airfoil up to, and beyond, stall. SAAP is presently evaluated through comparisons with experiments and with two other theoretical methods over an extensive range of airfoils and Reynolds number conditions. SAAP modeled drag more accurately than either of the other methods, and at angles of attack below stall yielded a smoother lift variation with angle of attack.
    Keywords: AERODYNAMICS
    Type: Journal of Aircraft (ISSN 0021-8669); 22; 156
    Format: text
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    NASA TECHNICAL REPORTS
  • 20
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    A wind tunnel inlet flow simulation (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AERODYNAMICS
    Type: Journal of Aircraft (ISSN 0021-8669); 22; 927
    Format: text
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    NASA TECHNICAL REPORTS
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