管内层流中单相流传热的正弦热通量源的数值和实验分析

IF 1.7 4区 工程技术 Q3 MECHANICS Heat and Mass Transfer Pub Date : 2024-07-26 DOI:10.1007/s00231-024-03501-z
S. Solnař
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引用次数: 0

摘要

本文论述了温度振荡法(TOIRT 法)在管道中水流层流中的应用。这种动态非接触方法是在假设流体侧温度均匀的情况下推导出来的,但在层流情况下违反了这一假设。利用数值模拟发现了入射热通量(由正弦函数调制)对传热系数局部值的基本影响。而传输信号的频率则没有影响。实验测量结果证实了数值结果,即使有 25% 的偏差,由于实验方法在这方面的敏感性,这仍然是一个很好的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Numerical and experimental analysis of the sinusoidal heat flux source of heat transfer in laminar flow in a tube for single phase flow

This article deals with the application of the temperature oscillation method (TOIRT method) to the laminar flow of water in a pipe. This dynamic and contactless method was derived for the assumption of homogeneous temperature on the fluid side, but this assumption is violated in the case of laminar flow. Numerical simulations were used to discover the fundamental influence of the amount of incident heat flux, which is modulated by the sine function, on the resulting local values of the heat transfer coefficient. The frequency of the transmitted signal, on the other hand, has no effect. The experimental measurement confirmed the numerical results even with a deviation of 25%, which is still a good result due to the sensitivity of the experimental method in this area.

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来源期刊
Heat and Mass Transfer
Heat and Mass Transfer 工程技术-力学
CiteScore
4.80
自引率
4.50%
发文量
148
审稿时长
8.0 months
期刊介绍: This journal serves the circulation of new developments in the field of basic research of heat and mass transfer phenomena, as well as related material properties and their measurements. Thereby applications to engineering problems are promoted. The journal is the traditional "Wärme- und Stoffübertragung" which was changed to "Heat and Mass Transfer" back in 1995.
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