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首页> 外文期刊>International Journal of Heat and Mass Transfer >Analysis of a free surface film from a controlled liquid impinging jet over a rotating disk including conjugate effects, with and without evaporation
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Analysis of a free surface film from a controlled liquid impinging jet over a rotating disk including conjugate effects, with and without evaporation

机译：分析旋转盘上受控液体撞击射流的自由表面膜，包括共轭效应（有和没有蒸发）

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摘要

A detailed analysis of the liquid film characteristics and the accompanying heat transfer of a free surface controlled liquid impinging jet onto a rotating disk are presented. The computations were run on a two-dimensional axi-symmetric Eulerian mesh while the free surface was calculated with the volume of fluid method. Flow rates between 3 and 15 lpm with rotational speeds between 50 and 200 rpm are analyzed. The effects of inlet temperature on the film thickness and heat transfer are characterized. The evaporative effects are captured when the fluid impinges on the disk at saturated conditions. The conjugate heating effect is modeled, and was found to effect the heat transfer results the most at both the inner and outer edges of the heated surface. The heat transfer was enhanced with both increasing flow rate and increasing rotational speeds. When evaporative effects were modeled, the evaporation was found to increase the heat transfer at the lower flow rates the most because of a fully developed thermal field that was achieved. The evaporative effects did not significantly enhance the heat transfer at the higher flow rates.
机译：给出了液膜特性的详细分析，以及自由表面控制的液体撞击射流到旋转盘上的伴随传热。计算是在二维轴对称欧拉网格上进行的，而自由表面是使用流体体积法计算的。分析了3至15 lpm之间的流量以及50至200 rpm的转速。表征了入口温度对薄膜厚度和传热的影响。当流体在饱和条件下撞击到磁盘上时，会捕获蒸发效果。对共轭加热效果进行了建模，发现在加热表面的内边缘和外边缘都对传热效果产生最大影响。随着流量的增加和转速的增加，传热得到了增强。当对蒸发效果进行建模时，发现蒸发会最大程度地提高较低流量下的热传递，这是因为获得了充分发展的热场。在较高的流速下，蒸发作用并未显着增强传热。

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