Shock wave diffraction on multi-facetted and curved walls |
| |
Authors: | Beric W Skews |
| |
Institution: | (1) School of Mechanical, Industrial, and Aeronautical Engineering, University of the Witwatersrand, PO WITS 2050, South Africa |
| |
Abstract: | The two-dimensional diffraction of a shock wave over a wall made up of a series of plane and/or curved sections is considered.
The analysis is based on the theory presented by, for the interaction of an originally plane shock wave with a corner. A method
is presented by which the shock profile may be determined for a wall of any shape and for any incident Mach number, in regions
where the characteristics form a simple wave. Comparisons are made between experimental measurements and theoretical predictions
for convex walls consisting of a number of facets, and for circular arcs, for a range of incident shock wave Mach numbers.
It is shown that the theory gives a satisfactory prediction of the wave shape, which improves as the Mach number increases.
Modifications in the flow field behind the shock, compared to that for a simple corner made up of two plane walls is discussed,
particularly relating to flow separation. For circular arc concave walls a inverse Mach reflection results experimentally,
leading to regular reflection, for which the theory is of no use.
PACS 47.40.Nm |
| |
Keywords: | Shock diffraction Whitham's theory |
本文献已被 SpringerLink 等数据库收录! |
|