NONEQUILIBRIUM VISCOUS HYPERSONIC FLOWS OVER ABLATING TEFLON SURFACES

被引:1
作者
BHUTTA, BA
SONG, DJ
LEWIS, CH
机构
[1] VRA, Inc., Blacksburg, VA
关键词
D O I
10.2514/3.26125
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Three-dimensional nonequilibrium viscous hypersonic flows over ablating Teflon surfaces are studied using viscous shock-layer and parabolized Navier-Stokes (PNS) schemes. The three-dimensional nonequilibrium PNS scheme developed in this study is inherently stable in the subsonic as well as the supersonic flow regions and, thus, does not require any sublayer approximation. The scheme is formulated in terms of a general curvilinear coordinate system, and a second-order smoothing approach is used to damp the numerical solution oscillations.A new fully implicit and crossflow-coupled shock-fitting approach is used along with a pseudo-unsteady approach to significantly improve the numerical stability and computational efficiency, without compromising solution accuracy. Two test cases for the flow over a sphere-cone vehicle are considered to demonstrate this new three-dimensional nonequilibrium Teflon-air PNS scheme under zero and nonzero angle-of-attack conditions. © 1989 by VRA, Inc. © The American Institute of Aeronautics and Astronautics, Inc. All Rights Reserved.
引用
收藏
页码:205 / 215
页数:11
相关论文
共 49 条
[1]  
AGARWAL R, 1978, AIAA780065 PAP
[2]  
AGARWAL R, 1978, AIAA781211 PAP
[3]  
[Anonymous], NASARFLTR703
[4]   SHOCK-TUBE STUDY OF CARBON MONOXIDE DISSOCIATION USING VACUUM-ULTRAVIOLET ABSORPTION [J].
APPLETON, JP ;
STEINBERG, M ;
LIQUORNIK, DJ .
JOURNAL OF CHEMICAL PHYSICS, 1970, 52 (05) :2205-+
[5]  
BARON JR, 1956, MIT TR160 NAV SUP LA
[6]  
BARON JR, 1987, COMMUNICATION
[7]   PREDICTION OF 3-DIMENSIONAL HYPERSONIC FLOWS USING A PARABOLIZED NAVIER-STOKES SCHEME [J].
BHUTTA, BA ;
LEWIS, CH .
JOURNAL OF SPACECRAFT AND ROCKETS, 1989, 26 (01) :4-13
[8]  
BHUTTA BA, 1985, AIAA850362 PAP
[9]  
BHUTTA BA, 1985, VRATR8502 VRA INC
[10]  
BHUTTA BA, 1987, VRATR8702