EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER AND PRESSURES ON A SWEPT CYLINDER IN THE VICINITY OF ITS INTERSECTION WITH A WEDGE AND FLAT PLATE AT MACH NUMBER 4.15 AND HIGH REYNOLDS NUMBERS

摘要

Heat-transfer rates and pressures have been measured on a circular cylinder in the region of flow interference caused by an adjoining 8° half-angle sharp wedge. Data were obtained at sweep angles of 20° and 60° with respect to the free-stream flow direction. At the 20° sweep angle some data were obtained with a flat plate as well as with the wedge. The test Reynolds numbers were suffi¬ciently large so that the boundary layer was always turbulent on the cylinder and wedge or plate.nFor 20° sweep angle the peak values of pressure and heat transfer occurred about half a cylinder diameter from the wedge and were apparently caused by local flow conditions and separation on the wedge upstream of the cylinder. When the sweep angle was 60°, no separation occurred, and the peak pressure and heat trans¬fer on the cylinder could be accurately predicted by the theory for turbulent heating on a yawed cylinder from the local flow conditions on the wedge. The local effect on the heating rates of the shock-wave impingement from the wedge was negligible at both sweep angles.