Comparison of experimental and numerical investigation on a jet in a supersonic cross-flow

摘要

Flow interaction of three different jet configurations ejecting air from a flat plate into a supersonic cross flow were investigated experimentally and numerically. The test conditions encompassed a jet pressure ratio of P_(0j), P_∞ = 100 at a Mach number of M_∞ = 5 and Reynolds number of about Re_∞ = 25 x 10~6 based on the length of the flat plate. The investigated test cases are: a) single jet; b) four jets positioned in-line in main flow direction; c) four jets positioned side-by-side in spanwise direction. The prediction of the overall flow phenomena as occurring within the interaction area was in fair agreement with the experiments, although quantitatively differences occur that will be discussed in the paper. The results of the comparison are presented and the experimental data are used to validate the applied code.