Application of transient heat flux sensors to resolve time-dependent convective heat transfer from wall-mounted cubes

机译：瞬态热通量传感器在壁挂立方体中解析时间依赖性对流热传递

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The application of an active fast-responding heat flux sensor to time-dependent heat flux measurements was studied for two aerodynamically interfering wall-mounted cubes. This sensor was in-house made and it consisted of a heated thin platinumfilm deposited on an insulating substrate of glass. The frequency response of the sensor was determined from a calibration with chopped laser beams and with responses to on forehand known periodic oscillations in the flow. The purpose of the study was tomeasure possible correlation between the vortex shedding, induced at the upstream cube in the tandem, and the convective heat flux from the side faces of the downstream cube. This implied that we were mainly interested in detecting possible characteristic frequencies carried by the time-dependent heat flux signal rather than determining the absolute value of the time-dependent convective heat flux. The results showed maxima in the power density spectra of the heat flux signal at frequencies which were ingood agreement with the shedding frequencies found in the corresponding velocity spectra.

机译：研究了主动快速响应的热通量传感器到时间依赖的热通量测量值，用于两个空气动力学干扰壁挂式立方体。该传感器是内部制造的，并且它由沉积在玻璃绝缘基板上的加热薄铂金翅片组成。根据具有切碎激光束的校准确定传感器的频率响应，并在流动中的正前部周期性振荡上的响应。该研究的目的是在串联上游立方体诱导的涡旋脱落之间的可能相关性，以及来自下游立方体的侧面的对流热通量。这意味着我们主要有兴趣检测时间依赖的热通量信号所携带的可能特征频率，而不是确定时间依赖性对流热通量的绝对值。结果显示了热通量信号的频率密度光谱的最大值，其与相应速度光谱中的脱落频率相着。

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《ASME international mechanical engineering congress and exposition》|1998年||共7页
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E. R. Meinders; M. J. Geuzebroek; K. Hanjalic; A. Ortega;
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中图分类机械零件及传动装置;
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Application of transient heat flux sensors to resolve time-dependent convective heat transfer from wall-mounted cubes

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