Experimantal research on infrared radiation in hypersonic flow around blunt
高超声速钝锥流场红外辐射实验研究

This puper reports our experimental research on infrared radiation in reentry flows. The experiments are conducted in the oxygen-hydrogen detonation driven shock tunnel JF-10. Total enthalpy of the particular run amounts to 15.5 MJ/kg, pressure in the reservoir is 19.6 MPa, and the generated free stream velocity is approximately 5 km/s. InSb multi-element infrared imaging system is used to measure the infrared radiation. Taking a sphere-nosed blunt cone as the test model, the transverse infrared radiation power profiles in the shock layer and wake are obtained. The data show some unique features. Infrared radiation is weak near the wall, strong and relatively uniform in the middle region of the shock layer, and becomes weak again in the outer part of the shock layer. In the wake, the radiation is the strongest near the symmetric axis and becomes weaker monotonically while departing from the axis.