Shock turbulent interaction during shock-wave/boundary layer interaction over double wedge

In this present study, turbulent kinetic energy amplification/attenuation inside the separation bubble has been investigated during strong shock-wave/boundary layer interaction over a double wedge surface. The objective has been fulfilled by decomposing the turbulent kinetic energy production term Pk into its three constituent terms, of which the turbulence production due to mean flow deceleration Px plays the dominating role. The transmitted shock (TS) emanating from the triple point impinges on the boundary layer formed over the aft surface of the wedge and executes an upstream movement followed by a downstream one during a short initial transient. The upstream movement of transmitted shock and reflected shock (RS) imposes a strong adverse pressure gradient on the separation bubble. During this, Px is augmented due to a strong negative mean streamwise velocity gradient ∂ũ/∂x. Downstream movement of TS and RS reduces the adverse pressure gradient and leads to a less strongly negative mean velocity gradient ∂ũ/∂x, thereby diminishing Px.