CONICAL MACH REFLECTION OF MOVING SHOCK-WAVES - PART 2 - PHYSICAL ANDCFD EXPERIMENTATION

Analytical consideration of Mach reflections over cones using the ray- shock theory showed that they differ from those of the two-dimensional Mach reflection over wedges. Conical configurations include both self -similar and non-self-similar cases. However, even when self-similar, the conical configurations exhibit triple-point locus trajectory angle s with values which, for any given reflection angle, differ from those of self-similar, wedge cases. Additionally, within the range of possi ble conical configurations, different values of self-similar triple-po int locus angles exist for any given reflection angle depending on the geometry of the particular reflection process. While the ray-shock th eory, as discussed in a previous paper on this research. provides a us eful guide and a means of readily identifying these variations, verifi cation using both shock tube and numerical simulations is required and is now available. Results of experimentation for both self-similar an d non-self-similar axisymmetric cases using these techniques are repor ted here and comparisons are made with the previous analysis. These su pport the calculations of the ray-shock theory over much of the reflec tion angle, Mach number range as well as highlighting some limitations of the theory.