Time-Averaged and Time-Resolved Heat Flux Measurements on a Turbine Stator Blade Using Two-Layered Thin-Film Gauges
Time-Averaged and Time-Resolved Heat Flux Measurements on a Turbine Stator Blade Using Two-Layered Thin-Film Gauges
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使用两层薄膜测量仪对涡轮机定子叶片进行时间平均和时间分辨热通量测量
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发表时间：
2004
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通讯作者：
T. Arts
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作者：
V. Iliopoulou;R. Dénos;N. Billiard;T. Arts
本文介绍了采用双层薄膜应变片阵列测量下吹式风洞中试验的涡轮机内热流的步骤。该传感器由一个镍热敏电阻沉积在一个灵活的聚酰胺片，可以很容易地结合在一个基板上使用双面胶。该组件构成两层系统。首先，提出了一种数值算法来提取壁面热流从表面温度的历史测量的薄膜计。它非常灵活，可以处理多层系统。然后，提出了一个原始的程序来确定不同层的热性能和厚度。它使用上述数值算法加上最小化例程。评估程序的可重复性。最后，根据所提出的方法进行测试。结果成功地与使用单层薄膜压力计进行的测量进行了比较。
This paper describes the steps undertaken to measure heat flux in a turbine tested in a blowdown windtunnel when using a two-layered thin film gauge array. The sensor consists of a nickel thermoresistor deposited onto a flexible polyamide sheet that can be easily bounded on a substrate using double sided adhesive. The assembly constitutes a two-layered system. First, a numerical algorithm is proposed to extract the wall heat flux from the surface temperature history measured by the thin film gauge. It is very flexible and handles multilayered systems. Then, an original procedure is proposed to determine the thermal properties and the thickness of the different layers. It uses the above numerical algorithm coupled with a minimization routine. The repeatability of the procedure is assessed. Finally, tests are processed according to the proposed method. The results are successfully compared with measurements performed with single-layered thin film gauges.