(1) MOTOYAMA ENG. WORKS, LTD., 5-2, Ohhira-Kameoka, Ohhira vil. Kurokawa dist, Miyagi pref. 981-36, Japan, JP;(2) Shock Wave Research Center, Institute of Fluid Science, Tohoku University, Katahira 2-1-1, Aoba, Sendai 980-77, Japan, JP
Abstract:
This paper presents an experimental and numerical investigation of three-dimensional shock wave reflections over a corner
of two wedges intersecting perpendicularly in a shock tube. Experiments were conducted in a diaphragmless shock tube equipped with double-exposure diffuse holographic interferometry in which the time interval between
the first and second exposure was set to be . This arrangement clearly visualized complex configurations of three-dimensional shock wave reflections. A numerical study
was also carried out for interpreting these holographic interferometric observations by using the Weighted Average Flux (WAF)
method to solve the three-dimensional unsteady compressible Euler equations. It was found that along the line of the intersection
of these two wedges, two Mach stems intersected each other resulting in the formation of a Mach stem which leaned forward.
Received 30 June 1996 / Accepted 6 October 1996