Low Reynolds number effects in a Mach 3 shock/turbulent-boundary-layer interaction

A study was conducted to demonstrate the low Reynolds number effects in a Mach-3 shock/turbulent boundary-layer interaction. The study showed the validation of the fluctuating wall pressure for the direct numerical simulation data. The study described the low Reynolds number effects by comparing the size of separation bubble and the wall pressure signal with high Reynolds numbers. The study also observed the Reynolds number effect on the turbulence amplification. The study proved that low Reynolds number indicated an increase in separation-bubble size with decreasing Reynolds number, because of viscous effects for lower Reynolds number. The study found that low Reynolds number showed a broader range of frequencies with amplitudes between the incoming boundary-layer value and high peak values for the shock wave.