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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >Experimental study on hypersonic shock-body interaction between bodies in close proximity using translucent fast pressure- and temperature-sensitive paints
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Experimental study on hypersonic shock-body interaction between bodies in close proximity using translucent fast pressure- and temperature-sensitive paints

机译：半透明快速压力和温度敏感涂料在附近紧密近距离的高度冲击体相互作用的实验研究

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摘要

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
机译：这项工作提出了快速响应的压力和温度敏感涂料的成功实施，用于研究舞台分离体之间的高超声声冲击体相互作用。快速PSP和TSP在两个相邻的表面上对称地应用，最小分离5mm，并且使用基于强度的方法在MA = 6流中获得时间分离的压力和温度场。通过开发通过玻璃墙允许反向照明和成像的半透明涂料来克服有限光学访问的技术屏障。对于具有弱/轻度冲击冲击表面的情况，原位校准通常足以去除温度诱导的误差。对于具有强烈冲击冲击和大的温度梯度的情况，基于原位校准之前的TSP结果，在PSP数据上施加温度校正。具有温度校正的PSP结果与传感器数据显示出良好的一致性。 PSP和TSP清楚地可视化由于冲击体相互作用引起的复杂流动结构，这允许对分离距离和倾斜角度的影响进行详细分析。图形摘要

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