An integral heat flux sensor with high spatial and temporal resolutions
An integral heat flux sensor with high spatial and temporal resolutions
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DOI：
10.1007/s11434-014-0464-6
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发表时间：
2014-06
影响因子：
--
通讯作者：
Songata Wu;Yonghua Shu;Jinping Li;Hongru Yu
中科院分区：
文献类型：
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作者：
Songata Wu;Yonghua Shu;Jinping Li;Hongru Yu
为了测量风洞中尖锐前缘和其他曲率半径很小的表面上的热流，于红如提出了一种新型的积分型热流传感器设计。与传统的热流传感器相比，积分式热流传感器的空间分辨率提高了一个数量级，传感元件尺寸成功地缩小到0.1mm，满足了R0.5mm尖锥驻点热流测量的要求。采用电子束共蒸发法制备康铜薄膜作为一体化热流传感器的接触层。通过数值计算分析了传感器结构对测量精度的影响。在激波风洞中的测量结果表明，该系统的响应频率约为100 kHz，重复性误差小于10%。
To measure heat flux on the sharp leading edge and other surface with very small curvature radius in the wind tunnel, Hong-Ru Yu proposed a novel design of integral type heat flux sensor. Compared with the traditional heat flux sensor, the integral type heat flux sensor improved spatial resolution up to an order of magnitude, and the size of the sensing elements has been minimized to 0.1 mm successfully, which satisfied the heat flux measurement requirements atR0.5 mm pointed cone stagnation point. A constantan film was used as the contact layer of the integral heat flux sensor, which was prepared by electron beam co-evaporation method. The influence of sensor structure on the accuracy of measurement was analyzed using numerical calculation. The measurement results in shock wave wind tunnel indicated that the response frequency was about 100 kHz and the repeatability error was less than 10 %.