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首页> 外文期刊>International Journal of Heat and Mass Transfer >Investigation of natural convection heat transfer around a radial heat sink with a concentric ring
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Investigation of natural convection heat transfer around a radial heat sink with a concentric ring

机译：具有同心环的径向散热器周围自然对流换热的研究

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摘要

This paper presents numerical and experimental studies on the heat transfer characteristics around a radial heat sink with a horizontal circular base, concentric ring, and rectangular fins that are subject to natural convection. An FVM (Finite Volume Method) numerical model was used to analyze the temperature and natural convection heat transfer on the surfaces of the radial heat sink for a wide range of geometric parameters. The effects of dimensionless fin length (0.40 ≤ l~* ≤ 0.53), dimensionless spacing between fins (0.127 ≤ s~* ≤ 0.288), and the Elenbaas number (0.5 ＜ El ＜ 50) on the Nusselt number of the heat sink were investigated. In order to support the numerical results, experimental study is performed. The experimental result indicates that the present numerical model predicts the Nusselt number well within a maximum error of 4%. Based on the numerical results, a generalized correlation for predicting the Nusselt number was developed as a function of the three aforementioned nondimensional parameters. This correlation can be widely utilized for predicting the thermal performance of radial heat sinks with concentric rings subject to natural convection.
机译：本文提供了关于径向散热器的传热特性的数值和实验研究，该散热器具有水平圆形底座，同心环和矩形翅片，这些翅片易受自然对流。 FVM（有限体积法）数值模型用于分析径向散热片表面上的温度和自然对流换热的各种几何参数。散热片长度的无量纲（0.40≤l〜*≤0.53），散热片之间的无量纲间距（0.127≤s〜*≤0.288）和Elenbaas数（0.5 ＜El ＜50）对散热器的Nusselt数有影响调查。为了支持数值结果，进行了实验研究。实验结果表明，该数值模型可以很好地预测努塞尔特数，最大误差为4％。基于数值结果，根据上述三个无量纲参数，开发了用于预测努塞尔数的广义相关性。这种相关性可广泛用于预测具有自然对流的同心环的径向散热器的热性能。

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