During multi-jet cooling, the complex hydrodynamic characteristics caused by the interaction between jets will affect the heat transfer of the plate. To further clarify the heat transfer characteristics in different flow regions, the double-jet cooling experiments were completed on a 50-mm-thick plate with the initial cooling temperature and jet angle in the range of 300–900 °C and 0°–60°, respectively. The inverse heat conduction was used to calculate the surface temperature and heat flux. Furthermore, the rewetting phenomenon, maximum heat flux and maximum cooling speed were studied. The results show that increasing the angle between jet and wall normal would increase the wetting front’s width downstream of the jet point. When the jet angle was 60°, the maximum value increased by 37.29 mm compared with that when the angle was 0°. The correlation between the width of the wetting front and the radial temperature gradient was further confirmed. In addition, it was found that the maximum heat flux would be affected by the duration of transition boiling, but not affected by complete wetting time. The results clarified the heat transfer mechanisms under various initial cooling temperature and inclination angle conditions on plate cooling in different flow regions, and provided valuable data for controlling heat transfer efficiency and improving cooling uniformity.

在多喷口冷却期间，由喷口之间的相互作用引起的复杂的流体动力学特性将影响板的热传递。为了进一步阐明不同流动区域的传热特性，在50毫米厚的板上完成了双喷冷却实验，初始冷却温度和喷角度在300–900°C和0°–60范围内°，分别。逆热传导用于计算表面温度和热通量。此外，研究了再润湿现象，最大热通量和最大冷却速度。结果表明，增加射流与壁法线之间的角度会增加射流点下游的湿润前沿宽度。当喷射角为60°时，与喷射角为0°时相比，最大值增加了37.29mm。湿润前沿的宽度与径向温度梯度之间的相关性得到了进一步证实。另外，发现最大热通量将受过渡沸腾的持续时间的影响，但不受完整润湿时间的影响。结果阐明了在不同初始冷却温度和倾角条件下板流在不同流动区域中的传热机理，为控制传热效率和改善冷却均匀性提供了有价值的数据。