CFD Validation Studies for Hypersonic Flow Prediction PDF Download
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Author: Peter A. Gnoffo
Publisher:
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Languages : en
Pages :
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Author: Peter A. Gnoffo
Publisher:
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Category :
Languages : en
Pages :
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781724976987
Category :
Languages : en
Pages : 38
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A roadmap for computational fluid dynamics (CFD) code validation is developed. The elements of the roadmap are consistent with air-breathing vehicle design requirements and related to the important flow path components: forebody, inlet, combustor, and nozzle. Building block and benchmark validation experiments are identified along with their test conditions and measurements. Based on an evaluation criteria, recommendations for an initial CFD validation data base are given and gaps identified where future experiments would provide the needed validation data. Marvin, Joseph G. Ames Research Center NASA-TM-103935, A-92091, NAS 1.15:103935 RTOP 505-59-00...
Author: William L. Oberkampf
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Category :
Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages : 24
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Category :
Languages : en
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Author: Frank K. Lu
Publisher: AIAA
ISBN: 9781600864483
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 694
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Author: Joseph G. Marvin
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Category :
Languages : en
Pages :
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Author: Graham V. Candler
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 70
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During the past three years, we have worked to develop and analyze a high-enthalpy flow dataset for CFD code validation. In collaboration with CUBRC Inc. personnel, we designed the experimental conditions for the double-cone geometry used in previous low-enthalpy nitrogen tests. We then used our standard CFD codes and thermo-chemical models to analyze these flows. In general, the comparisons with nitrogen flows are good, even at high enthalpy (10MJ/kg). But the comparisons between predictions and experiments for air above 5MJ/kg is poor. We find that as the enthalpy increases, the agreement gets worse. In particular, the CFD predicts that the separation zone decreases in size much more rapidly than given in the experiments.
Author:
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Category :
Languages : en
Pages : 15
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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725061569
Category :
Languages : en
Pages : 34
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Book Description
The role of experiment in the development of Computation Fluid Dynamics (CFD) for aerodynamic flow prediction is discussed. The CFD verification is a concept that depends on closely coordinated planning between computational and experimental disciplines. Because code applications are becoming more complex and their potential for design more feasible, it no longer suffices to use experimental data from surface or integral measurements alone to provide the required verification. Flow physics and modeling, flow field, and boundary condition measurements are emerging as critical data. Four types of experiments are introduced and examples given that meet the challenge of validation: flow physics experiments; flow modeling experiments; calibration experiments; and verification experiments. Measurement and accuracy requirements for each of these differ and are discussed. A comprehensive program of validation is described, some examples given, and it is concluded that the future prospects are encouraging. Marvin, Joseph G. Ames Research Center NASA-TM-100087, A-88123, NAS 1.15:100087 RTOP 505-60-11...
