Direct Numerical Simulation of Receptivity and Evolution of Disturbances in Hypersonic Shock Layer over Flat Plate

摘要

THE problem of receptivity and evolution of disturbances in a viscous hypersonic shock layer on a flat plate is A investigated with help of Direct Numerical Simulation (DNS). The computations are performed at the Mach number M = 21 and the Reynolds number based on the plate length ReL = 1.44 · 105, In recent years, the instability of a hypersonic shock layer excited by artificial and natural disturbances was studied in the experiments [1,2] conducted in the T-327 hypersonic nitrogen wind tunnel of ITAM, Novosibirsk. Numerical simulations in the present work are performed at the same flow parameters as in the above-mentioned experiments and aimed at reproducing the experimental results and further investigation of the mechanisms of receptivity and flow instability at very high Mach numbers.