On regular reflection to Mach reflection transition in inviscid flow for shock reflection on a convex or straight wedge

Similarity in Mach stem evolution and termination in unsteady shock-wave reflection

“…This was also shown experimentally by Ram, Geva & Sadot (2015). A similar qualitative analysis of RR over segments of wedges forming a convex surface was performed by Wang & Zhai (2020). They provided a qualitative description of the disturbances and found that the reverse RR → MR transition can be predicted by the pseudo-steady transition criterion regardless of shock strength and surface geometry.…”

Prediction of triple point trajectory on two-dimensional unsteady shock reflection over single surfaces

“…Therefore, the TP trajectory and these two transitions have gained extensive attention for decades. The transition in a wide variety of unsteady shock reflections over a convex or a straight wedge has been investigated (Wang & Zhai 2020), and it was found that the pseudo-steady criterion is capable of predicting the transition because the corner-generated disturbance cannot overtake the reflection point before the pseudo-steady criterion is reached. Prediction of the transition and the TP trajectory in the unsteady shock reflection, however, still remains a challenge in theory.…”

“…As a result, there are five types of unsteady shock reflection with the wedge angle increased, including a planar shock reflection over a concave wedge, a convergent cylindrical shock reflection over a straight/concave/convex wedge and a divergent cylindrical shock reflection over a concave wedge; and five types of unsteady shock reflection with the wedge angle reduced, including a planar shock reflection over a convex wedge, a divergent cylindrical shock reflection over a straight/convex/concave wedge and a convergent cylindrical shock over a convex wedge. The differing types of curved shock reflections have been classified and schematically illustrated in our previous work (Wang & Zhai 2020), where readers can find more details.…”

“…(1981) and Ben-Dor & Takayama (1985). To better understand the reflection process, the shock reflection over a curved wedge can be divided into many mini-double-wedge shock reflections (Ben-Dor, Dewey & Takayama 1987; Li & Ben-Dor 1999; Xie, Han & Takayama 2005; Krassovskaya & Berezkina 2017; Wang & Zhai 2020; Yuan et al. 2020).…”

Propagation of a planar shock wave along a convex–concave ramp

“…They observed that the shock wave transition in unsteady flows is also influenced by the rotation of the reflected shock wave about the point of reflection, which makes it different from the pseudo-steady transition. Recently, Wang & Zhai (2020) studied the unsteady shock transitions over convex and straight wedges when planar and curved shocks move over them. Irrespective of the effect of unsteady flow and shock intensity, it is found that the inviscid shock transition over a convex wedge can be predicted by pseudo-steady transition criteria.…”