Two- and three-dimensional viscous computations of a hypersonic inlet flow

Abstract

and Wing-Fa1 Ng and Arthur Taylor V i r g i n i a Polytechnic I n s t i t u t e and S t a t e U n i v e r s i t y Blacksburg, V i r g i n i a 24061 SUMMARY A three-dimensional parabolized Navier-Stokes code has been used t o invest i g a t e t h e f l o w through a Mach 7.4 i n l e t . A two-dimensional parametric study o f g r i d r e s o l u t i o n , turbulence modeling and e f f e c t o f gamma has been done and compared w i t h experimental r e s u l t s . The r e s u l t s show t h a t mesh r e s o l u t i o n o f t h e shock waves, r e a l gas e f f e c t s and turbulence l e n g t h s c a l i n g a r e very impor-CD t a n t t o g e t accurate r e s u l t s f o r hypersonic i n l e t flows. I n a d d i t i o n , a threedimensional c a l c u l a t i o n o f t h e Mach 7.4 i n l e t has been done on a s t r a i g h t l a y e r i n t e r a c t i o n phenomena causes s i g n i f i c a n t three-dimensional f l o w i n t h e i n l e t .

Turbulence modeling in a hypersonic inlet

“…The possibility of three-dimensional effects causing these large variations was eliminated by results from a parallel study using three-dimensional simulation. 12 When run with the transition option, the Baldwin-Lomax model does not perform any better than its corresponding fully turbulent run. In fact, the solutions for the fully turbulent run and with the transition option are almost identical to each other.…”