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An inverse problem in determining the heat transfer rate around two in line cylinders placed in a cross stream

机译：确定交叉流中放置的两个直列圆柱周围传热速率的反问题

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摘要

In this study, a conjugate gradient method based on an inverse algorithm is applied to estimate the unknown space and time dependent forced convection heat transfer rate of two in line cylinders placed in a cross stream. While knowing the temperature history at the measuring positions near the surfaces of the cylinders, the heat transfer rate on the surfaces of both cylinders can be successfully computed. No prior information is needed on the functional form of the unknown heat transfer rate. A particular feature in this study is that the considered Reynolds number is high enough to result in an unsteady flow around the cylinders. In addition to the transient temperature field, this makes the flow field itself time dependent as well, thus adding more complexity to the numerical analysis. The accuracy of the inverse analysis is examined by using the simulated temperature measurement. Results show that an excellent estimation on the heat transfer rate and temperature distributions can be obtained for the case considered in this study.
机译：在这项研究中，基于逆算法的共轭梯度法被应用于估计两个未知的空间和时间相关的强制对流换热速率，这两个横向气缸放置在横流中。在知道气缸表面附近的测量位置处的温度历史的同时，可以成功地计算两个气缸表面上的传热率。不需要关于未知传热速率的功能形式的先验信息。这项研究的一个特殊特征是，考虑到的雷诺数足够高，以致导致圆柱体周围不稳定流动。除了瞬态温度场外，这还使流场本身也具有时间依赖性，因此增加了数值分析的复杂性。通过使用模拟温度测量来检查逆分析的准确性。结果表明，对于本研究中考虑的情况，可以很好地估计传热速率和温度分布。

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