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首页> 外文期刊>Journal of Thermophysics and Heat Transfer >Convective Droplet Impact and Heat Transfer from a NACA Airfoil
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Convective Droplet Impact and Heat Transfer from a NACA Airfoil

机译：NACA机翼的对流液滴冲击和传热

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摘要

This paper develops a new nondimensional correlation of convective heat transfer with impinging droplets on a NACA airfoil. Both average and local Nusselt numbers are determined in terms of the Reynolds number, Prandtl number, and liquid water content of the droplet flowfield. A new multiphase Reynolds parameter is developed to normalize the experimental data, along a curve fit to measured data over a range of flow conditions. In this way, a modified Hilpert correlation can be extended to include effects of droplet-air interactions on the effective heat transfer coefficient. Droplet impact on the airfoil surface affects the structure of the thermal boundary layer, as well as energy exchange through kinetic energy of impinging droplets and a thin flowing film along the surface. Using the empirical correlation with a multiphase Reynolds parameter, this paper demonstrates that effects of varying both air velocity and liquid water content can be normalized into a single modified Hilpert correlation. Results are presented at varying Reynolds numbers and applications to icing problems are discussed.
机译：本文开发了一种新的与对流传热与NACA机翼撞击液滴的无量纲相关性。平均和局部努塞尔数均根据雷诺数，普朗特数和液滴流场的液态水含量来确定。开发了新的多相雷诺参数，以沿着与一系列流动条件下的测量数据拟合的曲线对实验数据进行归一化。以这种方式，可以扩展修改的希尔伯特相关性，以包括液滴-空气相互作用对有效传热系数的影响。翼型表面上的液滴撞击影响热边界层的结构，以及通过撞击液滴的动能和沿表面流动的薄薄膜的能量交换。使用具有多相雷诺参数的经验相关性，本文证明可以将空气流速和液态水含量的变化影响标准化为单个修正的Hilpert相关性。结果以不同的雷诺数表示，并讨论了在结冰问题上的应用。

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