INVESTIGATION OF HYPERSONIC FLOW OVER BLUNTED PLATES AND CONE

Abstract : Heat transfer rates and pressure distributions on three basic shapes were investigated at a nominal Mach number of 8 and free-stream Reynolds numbers from 0.43 to 3.4 million per foot. The models were a 0.4-in. nose radius, spherically blunted, 15-deg half-angle cone; two flat plate models with 0. 10-in. and 0. 50-in. cylindrical blunting; and a modified leading-edge plate with auxiliary planes to produce changing body shape within the elliptic flow region. The tests produced data showing the effect on heat transfer rates of the interaction of the essentially inviscid, rotational flow behind the bow shock with the viscous boundary layer on the body. The results of pressure distribution tests show good agreement with theory. Heat transfer rates over the entire body were accurately predicted through the use of outer-edge boundary-layer conditions obtained from isentropic expansion from normal-shock stagnation conditions.