Abstract This work presents a successful implementation of fast-responding pressure- and temperature-sensitive paints for study of hypersonic shock–body interaction between stage separation bodies. Fast PSP and TSP were applied symmetrically on two adjacent surfaces with a minimum separation of 5 mm, and the time-resolved pressure and temperature fields were obtained in a Ma = 6 flow using the intensity-based approach. The technical barrier of limited optical access was overcome through the development of translucent paints that allowed back-illumination and imaging through a glass wall. The in situ calibration was generally sufficient to remove the temperature-induced error for cases with weak/mild shock impingement on the surface. For cases with strong shock impingement and large temperature gradient, temperature correction was applied on the PSP data based on the TSP results prior to the in situ calibration. The PSP results with temperature correction showed good agreement with the transducer data. The complex flow structures due to shock–body interaction were clearly visualized by PSP and TSP, which allowed detailed analysis on the effects of separation distance and inclined angle. Graphic abstract

中文翻译：

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使用半透明快速压力和温度敏感涂料进行近距离物体之间高超声速冲击-物体相互作用的实验研究

摘要 这项工作成功实施了快速响应的压力和温度敏感涂料，用于研究级分离体之间的高超声速冲击体相互作用。快速 PSP 和 TSP 对称应用在两个相邻表面上，最小间隔为 5 mm，并使用基于强度的方法在 Ma = 6 流中获得时间分辨压力和温度场。通过开发允许背照和透过玻璃墙成像的半透明涂料，克服了光学访问受限的技术障碍。对于表面受到微弱/轻微冲击的情况，原位校准通常足以消除温度引起的误差。对于冲击冲击强、温度梯度大的情况，在原位校准之前，基于 TSP 结果对 PSP 数据应用温度校正。带有温度校正的 PSP 结果与传感器数据显示出良好的一致性。PSP 和 TSP 清楚地显示了由激波-体相互作用引起的复杂流动结构，从而可以详细分析分离距离和倾斜角的影响。图形摘要