Abstract
Global heat flux measurement techniques with high spatial resolution are needed to accurately capture the peak heat flux and its location for the design of thermal protection system. However, background radiation from combustion presents an obstacle to the application of global heat flux measurement techniques. To solve this problem, a new method for heat flux determination suitable for strong combustion radiation environment is described. The core idea of this method is that heat flux on the inner surface of the combustor was identified by solving the three-dimensional transient inverse heat conduction problem while measuring the outer surface temperature using temperature-sensitive paint. Measurement system configuration, data processing method, and effect of layer thickness of the temperature-sensitive paint on the measurement results are introduced in detail. Finally, both numerical and experimental results are presented to demonstrate the validity of the new method.
摘要
热防护系统设计需要高空间分辨率的热流密度场测 量 方法来获取热流密度峰值及其对应的空间位 置 然而, 燃烧产生的背景 辐射严重阻碍了现有热流密度场测 量 方法的应用. 为了解决该难题, 提出了一种适用于强辐射燃烧环境的热流密度场测 量 方法, 基本 思想是利用温敏漆测 量 燃烧室外壁面温度的变化历程结合三维瞬态热传导反问题的求解确定内壁面热流密度场分布. 文中详细介绍 了测量系统构成、 数据处理方法及温敏漆涂层厚度对测 量 结果的影响, 最后给出了数值和实验结果验证了该方法的可行性.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12272385, 12022202, 91941104, and 11872366).
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Chaokai Yuan designed the research and wrote the manuscript. Fanzhao Meng, Yunfeng Liu, and Huan Lian helped to set up the experiment system. Xu Liu contributed to the measurement of temperature sensitive paint. Chaokai Yuan, Xu Liu, and Di Peng analyzed the data and discussed the results. Yingzheng Liu helped organize the manuscript. Di Peng directed this project and revised the final version.
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Yuan, C., Meng, F., Liu, X. et al. Method of applying temperature-sensitive paint in hypersonic test with strong combustion radiation. Acta Mech. Sin. 39, 322474 (2023). https://doi.org/10.1007/s10409-023-22474-x
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DOI: https://doi.org/10.1007/s10409-023-22474-x