传感器局部温度差异对压缩拐角热流测量的影响

针对高超声速飞行器在进行热流测量时存在的传感器与其周围热防护材料之间的热匹配性问题，即冷点效应问题，采用自主研发的计算程序研究了冷点效应对压缩拐角表面热流分布的影响，得到了在不同压缩拐角特征流动区域内冷点效应对其表面热流分布的影响机制。计算结果分析表明：冷点效应的存在会显著地提高冷点区域内的表面热流值；在压缩拐角的分离域内，冷点效应造成的热流增长幅度较大，在再附点附近，冷点效应造成的热流增长幅度较小。

Influence of local temperature difference of sensors on heat flow measurement of compression corner

This work numerically investigates the cold-spot effect on the aerodynamic heating of a hypersonic compression corner. When measuring heat flow of hypersonic aircraft, thermal matching problems caused by the cold-spot effect appear between the sensor and surrounding heat-resistant materials. A self-developed calculation program is used to study the influence of cold-spot effect on the heat flow distributing on the surface of the compression corner, revealing the influencing mechanisms of the cold-spot effect on the surface heat flux distribution in the corner flow region. Calculation results show that the existence of the cold-spot effect will significantly increase the heat flow value in cold spot areas; the range of heat flow caused by the cold-spot effect becomes larger in the separation domain, and smaller near the reattachment point.