An Approximate Method for Calculating Three-Dimensional Inviscid Hypersonic Flow Fields

An Approximate Method for Calculating Three-Dimensional Inviscid Hypersonic Flow Fields
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Total Pages: 28
Release: 2018-06-30
Genre:
ISBN: 9781722063351

An approximate solution technique was developed for 3-D inviscid, hypersonic flows. The method employs Maslen's explicit pressure equation in addition to the assumption of approximate stream surfaces in the shock layer. This approximation represents a simplification to Maslen's asymmetric method. The present method presents a tractable procedure for computing the inviscid flow over 3-D surfaces at angle of attack. The solution procedure involves iteratively changing the shock shape in the subsonic-transonic region until the correct body shape is obtained. Beyond this region, the shock surface is determined using a marching procedure. Results are presented for a spherically blunted cone, paraboloid, and elliptic cone at angle of attack. The calculated surface pressures are compared with experimental data and finite difference solutions of the Euler equations. Shock shapes and profiles of pressure are also examined. Comparisons indicate the method adequately predicts shock layer properties on blunt bodies in hypersonic flow. The speed of the calculations makes the procedure attractive for engineering design applications. Riley, Christopher J. and Dejarnette, Fred R. Langley Research Center RTOP 506-40-91-01...

An Approximate Method for Calculating Three-Dimensional Inviscid Hypersonic Flow Fields

An Approximate Method for Calculating Three-Dimensional Inviscid Hypersonic Flow Fields
Author: National Aeronautics and Space Administration NASA
Publisher:
Total Pages: 27
Release: 2018-10-23
Genre:
ISBN: 9781729157510

An approximate solution technique was developed for 3-D inviscid, hypersonic flows. The method employs Maslen's explicit pressure equation in addition to the assumption of approximate stream surfaces in the shock layer. This approximation represents a simplification to Maslen's asymmetric method. The present method presents a tractable procedure for computing the inviscid flow over 3-D surfaces at angle of attack. The solution procedure involves iteratively changing the shock shape in the subsonic-transonic region until the correct body shape is obtained. Beyond this region, the shock surface is determined using a marching procedure. Results are presented for a spherically blunted cone, paraboloid, and elliptic cone at angle of attack. The calculated surface pressures are compared with experimental data and finite difference solutions of the Euler equations. Shock shapes and profiles of pressure are also examined. Comparisons indicate the method adequately predicts shock layer properties on blunt bodies in hypersonic flow. The speed of the calculations makes the procedure attractive for engineering design applications. Riley, Christopher J. and Dejarnette, Fred R. Langley Research Center RTOP 506-40-91-01...

NASA Technical Paper

NASA Technical Paper
Author: United States. National Aeronautics and Space Administration
Publisher:
Total Pages: 656
Release: 1990
Genre: Aeronautics
ISBN:

Report

Report
Author:
Publisher:
Total Pages: 962
Release: 1955
Genre: Aeronautics
ISBN: