Regular and Mach Reflection of Detonation Waves

Thus the calculated pressure gradients across the lens are probably less steep than those actually present in most plane wave generators. 

Experimental data indicate that the pressure profile behind the front is asymmetrically oriented with respect to the charge center. Pressure magnitude variations prevent obtaining high-quality shock initiation data, particularly for the more shock insensitive explosives. 

Radiographic studies of laterally colliding, diverging, cylindrical detonation waves in PBX-9404 have been studied using PHERMEX . The PHERMEX shot numbers are 1019, 1037, 1038, 1130 and 1143. The flow has been modeled using the 2DL code described in Appendix B. 

---

The diverging detonations collide first along the center axis. The density of the resulting shocked detonation products decays as the reflected shock travels back into the lower density products. As the diverging detonation waves continue to collide, detonation regular reflections and then Mach stems develop at the interaction interfaces. 

Fig. 7.6 The detonation wave going out of the duct to the space restricted with walls. Mach (a) and regular (b) reflections from the wall.

---