A scale analysis has been performed to investigate the film boiling heat transfer associated with cooling of a horizontal flat plate through water jet impinging. The forced convection film boiling of water is treated by classifying a wide spectrum of subcooling regime by two extreme situations of low and high subcooling dominated by mass evaporation and sensible heating respectively. A simple expression of heat ratio is derived for executing the classification. The ratio is derived by considering the heat and mass transport phenomena and vaporization effect. The radiation heat effect is considered, while obtaining the scale of wall Nusselt number for convective and total heat transfer under both low and high subcooling cases. The comparison of the developed correlations, based on scaling, are made for the wall superheat between 290 and 1100 °C and jet velocity of water between 0.4–3.2 m/s along with the variation of water subcooling between 5 and 45 °C. The proper coefficient of the scaling is developed by making overall comparison of the data from the analysis with experimental data to predict the heat transfer. The effect of liquid to vapor viscosity ratio indicates a substantially higher Nusselt number for the jet impingement of plate under film boiling condition. The density ratio influences the heat transfer only at low subcooling condition. A lower Jakob superheat number, higher Jakob liquid subcooling number, and higher jet Reynolds number increases Nusselt number.

已经进行了规模分析以研究与通过水射流冲击冷却水平平板相关的膜沸腾传热。强制对流膜沸腾的水处理是通过将两种过低的过冷状态和高过冷状态分别以质量蒸发和显热为主的两种极端情况进行分类来处理的。导出热比的简单表达式以执行分类。该比率是通过考虑传热和传质现象以及汽化效应得出的。考虑辐射热效应，同时获得低和高过冷情况下对流和总传热的壁努塞尔数标度。根据比例对已开发的相关性进行比较，壁过热度在290至1100°C之间，水的喷射速度在0.4至3.2 m / s之间，水过冷度在5至45°C之间变化。通过将分析数据与实验数据进行整体比较以预测热传递，可以开发出适当的比例系数。液体与蒸气的粘度比的影响表明，在薄膜沸腾条件下，板的射流冲击的努氏数明显更高。密度比仅在低过冷条件下影响传热。较低的雅各布过热度数，较高的雅各布液体过冷数和较高的射流雷诺数会增加Nusselt数。通过将分析数据与实验数据进行整体比较以预测热传递，可以开发出适当的比例系数。液体与蒸气的粘度比的影响表明，在薄膜沸腾条件下，板的射流冲击的努氏数明显更高。密度比仅在低过冷条件下影响传热。较低的雅各布过热度数，较高的雅各布液体过冷数和较高的射流雷诺数会增加Nusselt数。通过将分析数据与实验数据进行整体比较以预测热传递，可以开发出适当的比例系数。液体与蒸气的粘度比的影响表明，在薄膜沸腾条件下，板的射流冲击的努氏数明显更高。密度比仅在低过冷条件下影响传热。较低的雅各布过热度数，较高的雅各布液体过冷数和较高的射流雷诺数会增加Nusselt数。密度比仅在低过冷条件下影响传热。较低的雅各布过热度数，较高的雅各布液体过冷数和较高的射流雷诺数会增加Nusselt数。密度比仅在低过冷条件下影响传热。较低的雅各布过热度数，较高的雅各布液体过冷数和较高的射流雷诺数会增加Nusselt数。