Dr. Miaomiao Wang

Postdoc

Tsinghua University

Shock reflection and interaction are important flow phenomena in high-speed aerodynamics, the former can be classified into three categories: steady shock reflection, pseudo-steady shock reflection and unsteady reflection (Ben-Dor 1988), and the latter may produce six types of shock interference patterns (Edney 1968). Shock reflection and shock interaction are somewhat studied independently, while shock-on-shock interaction shares the features of both shock reflection and shock interference.

 

Shock-on-shock interaction has important applications in problems where one supersonic object encounters another supersonic object. Small perturbation theory and experimental measurement were used in the early stage studies (Smyrl 1963; Blankenship1965; Inger 1966a; Inger 1966b; Brown & Mullaney 1965; Merritt & Aronson 1966; Gentry et al. 1966; Merritt & Aronson 1967). Numerical simulation began in the 1970s (Kutler et al. 1974,1975; Kutler & Skell 1975; Law et al. 2003). Apart from applications where two supersonic objects move at different speeds or directions, shock-on-shock interaction also occurs in the launch of supersonic projectile, with this projectile overtaking an out-going shock wave formed in early moment (Athira et al. 2020). In recent years we investigated shock-on-shock interaction with frame transformation, using conventional shock reflection and shock interaction theories, and published three articles in Journal of Fluid Mechanics and one article in Chinese Journal of Aeronautics.