Oil jet impingement cooling is the standard approach to cool high-speed high-power gears. The heat transfer between oil jets and gears is experimentally investigated in this paper. The three established methods of oil jet impingement cooling -into-mesh, out-of-mesh and inclined impingement on one of the gears- are studied. Heat transfer coefficients for these methods are experimentally determined. A loss correction approach is implemented for the evaluation of measurements. For the inclined impingement method, heat transfer on the non-impinged gear and the influence of meshing on the heat transfer coefficient are investigated. Gear meshing has an insignificant effect on the average heat transfer coefficient over the gear tooth. However, the spatial distribution of the heat transfer coefficient depends on the meshing configuration. Significant cooling on the non-impinged gear is observed with the inclined impingement method. The inclined impingement method is superior to the into-mesh and out-of-mesh methods at all measured operating points.

喷油冲击冷却是冷却高速大功率齿轮的标准方法。本文对喷油嘴和齿轮之间的传热进行了实验研究。研究了三种已建立的喷油冲击冷却方法——其中一个齿轮的啮合、脱离啮合和倾斜冲击。这些方法的传热系数是通过实验确定的。采用损耗校正方法来评估测量结果。对于倾斜冲击法，研究了非冲击齿轮上的传热以及啮合对传热系数的影响。齿轮啮合对轮齿上的平均传热系数影响不大。然而，传热系数的空间分布取决于网格配置。通过倾斜冲击方法观察到非冲击齿轮的显着冷却。在所有测量的工作点上，倾斜冲击法均优于啮合内和啮外法。