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为了更好地强化叶片前缘的换热,对叶片前缘进行两相流强化冲击冷却的耦合数值模拟研究。利用水滴/蒸汽冲击曲面冷却系统进行数值模拟程序的校核。在此基础上,利用欧拉-拉格朗日颗粒追踪方法对叶片前缘的两相流冲击冷却进行耦合数值研究。研究了水滴加湿量、水滴直径和水滴与壁面的作用边界条件对换热性能的影响。结果表明当加湿量从3%增加到8%时,最大的平均传热增强系数从1.671增加到4.913;水滴直径从5μm增加到20μm时,最大的平均传热增强系数从2.128降低到1.164;反弹和反弹+破碎边界条件预测的传热效果好于粘附和粘附+破碎边界条件。
In order to enhance the heat transfer of the leading edge of the blade, a coupled numerical simulation of the two-phase flow with impingement cooling on the leading edge of the blade was carried out. Water drop / steam impact surface cooling system for numerical simulation program check. Based on this, the coupled numerical study of the impact cooling of two-phase flow in the leading edge of the blade was carried out by the Euler-Lagrange particle tracking method. The effects of the amount of water droplets wetting, the diameter of droplets and the boundary conditions of water droplets and the wall on the heat transfer performance were studied. The results show that when the humidification volume increases from 3% to 8%, the maximum average heat transfer enhancement coefficient increases from 1.671 to 4.913. When the droplet diameter increases from 5μm to 20μm, the maximum average heat transfer enhancement coefficient decreases from 2.128 to 1.164. And the rebound + broken boundary conditions predict heat transfer better than the adhesion and adhesion + broken boundary conditions.