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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Estimation of the local heat transfer coefficient in coiled tubes: Comparison between Tikhonov regularization method and Gaussian filtering technique
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Estimation of the local heat transfer coefficient in coiled tubes: Comparison between Tikhonov regularization method and Gaussian filtering technique

机译：盘管局部传热系数的估计：Tikhonov正则化方法与高斯滤波技术的比较

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Purpose - Most of the passive techniques for enhancing heat transfer inside pipes (e.g. rough surfaces, swirl-flow devices and coiled tubes) give origin to an irregular distribution of the heat transfer coefficient at the fluid-wall interface along the wall perimeter. This irregular distribution could be critical in some industrial applications, but most of the available research papers, mainly due to the practical difficulty of local measuring heat flux on the internal wall surface of a pipe, present the results only in terms of Nusselt number averaged along the wall circumference. This paper aims to study the application of inverse problem solution techniques, which could overcome this limitation. Design/methodology/approach - With regard to the estimation of the local convective heat transfer coefficient in coiled tubes, two different inverse heat conduction problem solution techniques were considered and compared both by synthetic and experimental data. Findings - The paper shows the success of two inverse problem solution techniques in the estimation of the local convective heat transfer coefficient in coiled tubes. Originality/value - This paper fulfills an identified need because most of the available research papers present the results only in terms of average thermal performance, neglecting local behavior.
机译：目的-大多数用于增强管道内部传热的无源技术（例如粗糙表面，旋流装置和盘管）是沿壁周长在流体-壁界面处传热系数的不规则分布的根源。这种不规则的分布在某些工业应用中可能很关键，但是大多数可用的研究论文主要是由于难以实际测量管道内壁表面上的热通量，因此仅根据沿Nusselt数求平均值的方法得出结果。墙的周长。本文旨在研究逆问题解决技术的应用，以克服这一局限性。设计/方法/方法-关于盘管中局部对流传热系数的估计，考虑了两种不同的逆导热问题求解技术，并通过合成和实验数据进行了比较。研究结果-本文展示了两种反问题求解技术在盘管局部对流传热系数估算中的成功。原创性/价值-本文满足了已确定的需求，因为大多数可用的研究论文仅以平均热性能表示结果，而忽略了局部行为。

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