This paper presents an experimental and numerical investigation of 3D shock wave reflections over a corner of two wedges intersecting perpendicularly in a shock tube. Experiments were conducted in a 100 mm X 180 mm diaphragmless shock tube equipped with double-exposure diffuse holographic interferometry in which the time interval between the first and second exposures was set to be 1 microsecond(s) . This arrangement clearly visualized complex configurations of 3D shock wave reflections. A numerical study was also carried out for interpreting these holographic interferometric observations by using the Weighted Average Flux method to solve the 3D 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 was leaned forward.

Date Published: 28 May 1997
PDF: 10 pages
Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); doi: 10.1117/12.273438

Published in SPIE Proceedings Vol. 2869:
22nd International Congress on High-Speed Photography and Photonics
Dennis L. Paisley; ALan M. Frank, Editor(s)