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  • 1
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    Turbulence modeling for hypersonic flows (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Turbulence modeling for high-speed compressible flows is described and discussed. Starting with the compressible Navier-Stokes equations, methods of statistical averaging are described by means of which the Reynolds-averaged Navier-Stokes equations are developed. Unknown averages in these equations are approximated using various closure concepts. Zero-, one-, and two-equation eddy viscosity models, algebraic stress models, and Reynolds stress transport models are discussed. Computations of supersonic and hypersonic flows obtained using several of the models are discussed and compared with experimental results. Specific examples include attached boundary-layer flows, shock-wave boundary-layer interactions, and compressible shear layers. From these examples, conclusions regarding the status of modeling and recommendations for future studies are discussed.
    Keywords: AERODYNAMICS
    Type: In: Advances in hypersonics. Vol. 2 - Modeling hypersonic flows (A94-10759 01-02); p. 1-43.
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  • 2
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    Experiments suitable for wind tunnel wall interference assessment/correction (1984)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: Three experiments suitable for wall interference assessment and evaluation of proposed correction methods are presented. The experiments are: (1) a series of airfoil tests using a newly designed transonic flow facility that employs side-wall boundary layer suction and upper- and lower-wall shaping; (2) tests on a swept airfoil section spanning a solid-wall wind tunnel with fixed contouring on all four walls; and (3) tests on a swept wing of aspect ratio 3 mounted in a solid-wall wind tunnel with fixed flat walls. Each of the experiments provides data on the airfoil sections as well as on the wind tunnel walls. All the experiments were performed in solid wall wind tunnels corrected for boundary layer displacement effects. Although the experiments were performed primarily to evaluate computer code performance, it is believed that they also provide information that can be used to evaluate methods for assessing and correcting wall interference effects.
    Keywords: AERODYNAMICS
    Type: NASA. Langley Research Center Wind Tunnel Wall Interference Assessment and Correction, 1983; p 171-190
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  • 3
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    An experimental and numerical investigation of shock wave induced turbulent boundary layer separation at hypersonic speeds (1975)
    In:  CASI
    Details
    Publication Date: 2011-10-14
    Description: A thoroughly documented experiment is reported that was specifically designed to test and guide computations of the interaction of an impinging shock wave with a turbulent boundary layer. Detailed mean flow field and surface data are presented for two shock strengths which resulted in attached and separated flows, respectively. Numerical computations are used to illustrate the dependence of the computations on the particulars of the turbulence models. Models appropriate for zero pressure gradient flows predicted the overall features of the flow fields, but were deficient in predicting many of the details of the interaction regions. Improvements to the turbulence model parameters were sought through a combination of detailed data analysis and computer simulations which tested the sensitivity of the solutions to model parameter changes. Computer simulations using these improvements are presented and discussed.
    Keywords: AERODYNAMICS
    Type: AGARD Flow Separation; 13 p
    Format: text
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  • 4
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    Modeling of turbulent separated flows for aerodynamic applications (1986)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: Steady, high speed, compressible separated flows modeled through numerical simulations resulting from solutions of the mass-averaged Navier-Stokes equations are reviewed. Emphasis is placed on benchmark flows that represent simplified (but realistic) aerodynamic phenomena. These include impinging shock waves, compression corners, glancing shock waves, trailing edge regions, and supersonic high angle of attack flows. A critical assessment of modeling capabilities is provided by comparing the numerical simulations with experiment. The importance of combining experiment, numerical algorithm, grid, and turbulence model to effectively develop this potentially powerful simulation technique is stressed.
    Keywords: AERODYNAMICS
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  • 5
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    Flow fields and aerodynamic heating of space shuttle orbiters (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Wind tunnel simulations of flow fields and aerothermodynamics of space shuttle orbiters
    Keywords: FLUID MECHANICS
    Type: NASA SPACE SHUTTLE TECHNOL. CONF., VOL. 1 APR. 1971; P 21-73
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  • 6
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    Turbulent-wake calculations with an eddy-viscosity model. (1972)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: A simple eddy-viscosity model is shown to make it possible to calculate numerically the mean properties of a turbulent wake. Although the structure of the Reynolds stress terms is not resolved, the results obtained are adequate for predicting velocity profiles and displacement thicknesses.
    Keywords: AERODYNAMICS
    Type: AIAA Journal; 10; Feb. 197
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  • 7
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    Laminar convective heating and ablation in the Mars atmosphere. (1967)
    In:  Other Sources
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    Publication Date: 2011-08-11
    Description: Mars atmospheric composition and laminar convective heating and ablation studied to predict performance of heat protection systems during entry
    Keywords: THERMODYNAMICS AND COMBUSTION
    Type: /AMERICAN INST. OF AERONAUTICS AND ASTRONAUTICS
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  • 8
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    Static aerodynamics, flow fields and aerodynamic heating of space shuttle orbiters (1970)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Wind tunnel tests of aerodynamic stability, boundary layer transition, and heat transfer in space shuttle orbiters
    Keywords: AERODYNAMICS
    Type: SPACE TRANSPORTATION SYSTEM TECHNOL. SYMP., VOL. 1 JUL. 1970; P 142-193
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  • 9
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    Convective heat transfer in planetary gases. (1966)
    In:  Other Sources
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    Publication Date: 2011-08-11
    Description: Heating rates in gas mixtures of planetary atmospheres predicted by equation using transport properties of gases at lower temperatures
    Keywords: THERMODYNAMICS AND COMBUSTION
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  • 10
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    CFD validation for forebody inlet interactions (1991)
    In:  Other Sources
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    Publication Date: 2013-08-29
    Description: Topics covered include the computational fluid dynamics (CFD) task force philosophy, a road map for CFD code validation, computer code validation requirements for forebodies and inlets, the criteria for choosing recommended experiments, an all-body hypersonic experiment, and centerline heat transfer. Information is given in viewgraph form.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: JHU, Computational Fluid Dynamics Code Validation(Calibration. JANNAF Airbreathing Propulsion Subcommittee Workshop: High-Speed Inlet Forebody Interactions; p 271-296
    Format: text
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