Numerical Predictions of Hypersonic Flow over a Two-Dimensional Compression Ramp

摘要

Numerical simulations of a laminar, two-dimensional flat-plate/ compression-ramp hypersonic flow have been carried out. It appears that the general flow features, which include a large region of separated flow, are modeled correctly but the separation and reattachment lengths are slightly overpredicted. Although good agreement with experimental heat flux data is apparent on the flat-plate surface, the heat flux is underpredicted on the ramp and, in particular, in the reattachment area. Reasons for the discrepancies are discussed, and it is concluded that three-dimensional effects, possibly accompanied by transition in the free shear layer, are probably responsible for the observed differences between numerical and experimental results.