| Abstract: | The heat transfer to sharp and slightly blunted flat plates in the zone of oblique shock incidence has been experimentally investigated. The experiments were performed at the Mach numbers M = 6, 8, and 10 and Reynolds numbers ranging from 0.2 × 106 to 1.3 × 106 corresponding to transitional (laminar-turbulent) flow in the shock-induced separation zone. Emphasis is placed on small values of the bluntness radius r. It is established that there exists a threshold value r th of the radius that bounds the range of its influence on the heat transfer, namely, an increase in r to r th leads to a sharp reduction in the maximum heat transfer coefficient in the interference zone, whereas a further increase (beyond r th) has only a slight effect on the maximum heat transfer coefficient. The dependence of r th on the main hypersonic flow parameters is analyzed. an explanation of the observable phenomena is given. |
