Three-Dimensional Structure of a Supersonic Jet Impinging into an Inclined Plate

Abstract

The now structure of an underexpanded supersonic jet impinging on an inclined hat plate has been numerically investigated using a total-variation-diminishing scheme for the Euler equations, The impinging jet is characterized by many discontinuities, such as barrel shock, exhaust gas jet boundary, Mach disk, reflected shock, plate shock, subtail shock, contact surface, and sometimes a stagnation bubble, Furthermore, if the plate is inclined, the jet structure becomes three-dimensional and severely distorted. The effect of plate inclination has been investigated in the present paper by studying the formation of the asymmetric stagnation bubble and the magnitude and location of the maximum wall pressure. Comparison with the existing experimental results over a broad range of data sets on pressure and shock structure has led to the conclusion that the present inviscid numerical model can offer fairly good prediction of the impinging jet for moderate plate inclinations, The maximum wall pressure was found to be larger on the inclined plate than on the normal plate.