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首页> 外文期刊>Journal of Spacecraft and Rockets >Heat-Flux Measurements with Temperature-Sensitive Paint in a Mach-6 Quiet Tunnel
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Heat-Flux Measurements with Temperature-Sensitive Paint in a Mach-6 Quiet Tunnel

机译：在Mach-6安静的隧道中使用温度敏感涂料进行热通量测量

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摘要

A procedure based on an analytical inverse method is developed to calculate heat-flux distributions on a model using a time sequence of temperature-sensitive-paint images acquired in the Purdue quiet Mach-6 Ludwieg tube. Temperature-sensitive-paint measurements are conducted on a 7-deg half-angle sharp circular metal cone at Mach 6 to evaluate the accuracy of this method. It is found that the historical effect of the warming-up process of a model in sequential runs becomes significant. Therefore, it must be corrected by in situ calibration to obtain accurate heat-flux distributions. After this historical effect and the effect of the nonuniform coating thickness and other potential factors are corrected, the temperature-sensitive-paint-derived heat-flux distributions on the cone are in good agreement with those given by the similarity solution and the reference temperature method. The error sources in temperature-sensitive-paint heat-flux measurements in the Ludwieg tube are discussed.
机译：开发了一种基于解析逆方法的程序，以使用在Purdue安静Mach-6 Ludwieg管中获取的温度敏感涂料图像的时间序列来计算模型上的热通量分布。在7度半角锐角圆形金属锥上以6马赫进行温度敏感涂料测量，以评估该方法的准确性。发现在连续运行中模型的预热过程的历史影响变得显着。因此，必须通过现场校准对其进行校正以获得准确的热通量分布。在校正了这种历史效应并修正了涂层厚度不均匀性及其他潜在因素的影响后，圆锥上的热敏涂料衍生的热通量分布与相似溶液和参考温度方法给出的分布良好一致。讨论了在Ludwieg管中对温度敏感的涂料热通量测量中的误差源。

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