Shock Wave Reflection Phenomena by Gabi Ben-Dor

By Gabi Ben-Dor

This booklet is a accomplished state-of-the-knowledge summation of outrage wave mirrored image phenomena from a phenomenological perspective. It incorporates a thorough advent to indirect surprise wave reflections, facing either standard and Mach forms. It additionally covers intimately the corresponding - and three-shock theories. The publication strikes directly to describe mirrored image phenomena in a number of circulate varieties, in addition to delivering the answer of the Neumann paradox.

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Extra resources for Shock Wave Reflection Phenomena

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M~ = 1. This fact implies that the reflected shock wave is always straight in the vicinity of the reflection point, R, and hence one of the basic assumptions upon which the two-shock theory is based, namely, uniform flow regions in the vicinity of the reflection point, is satisfied. It should be mentioned, however, that there are photographs of actual RR-configurations in which the reflected shock wave seems to be curved along its entire length. Although it is impossible, due to the lack of sufficient resolution capabilities, to categorically state whether the reflected shock wave indeed has a finite curvature at the reflection point, it is important to note that if RR-configurations with curved reflected shock waves do exist, then the sonic criterion is violated, and it should probably be replaced by the detachment criterion.

Experimental observations of the wave configurations of RR, SMR, TMR and DMR in shock-tube experiments indicated that any point on these wave configurations, having a radius vector, r, with the leading edge of the reflecting wedge as the origin, was transformed at a later time to a new point located at Cr, where C is a scalar constant. , x and y may be measured relative to any point moving with constant velocity with respect to the reflecting wedge. In other words, the flow 'is self-similar and as such it can be treated as pseudo-steady.

Instead, the reflection is either a TMR or a DMR. 9, respectively. 8). The only difference is that unlike the case of an SMR where the reflected shock wave, r, is curved along its·entire length, in a TMR, the reflected shock wave emanating from the triple point has a straight portion. The straight portion of the reflected shock wave extends from the triple point, T, to a point known as the kink, K. 8) is curved along its entire length until it terminates perpendicularly on the shock tube bottom wall.

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