AExperimental investigation of heat transfer distributions in a deep gap
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摘要: 在脉冲风洞中,和15.5,相应雷诺数的来流条件下,分别用平板和平头圆柱模型测量了狭窄缝隙内的详细热流分布。缝隙宽2mm,深25mm,模型攻角缝隙相对气流的偏转角β=0°~90°。本文给出了缝内典型热流分布结果,讨论了马赫数、攻角和偏转角对缝内热流分布的影响并与现有计算方法和实验数据进行了比较。Abstract: Detailed heat transfer distributions within a deep gap were measured with both a sharp leading edge flat plate and a flat cylinder at free-stream Mach numbers of 9.85,12.0,15.5 and corresponding unit Reynolds numbers of (1.0 × 107, 6.4 × 105, 3.2 × 105 )/m in CAS impulse tunnels. The gap was 2mm wide, 25mm deep and 100mm long. Attack angles α ranged from 0° to 90° and deflectionsβ from 0° to 90°. In this paper, typical heating distributions on the gap wall were presented; effects of Mach number, attack angle and deflection on heat transfer to the gap wall were discussed;and comparisons between measured and predicted gap heating were made.
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