Prediction Model of Boiling Heat Transfer Coefficient in Rectangular Narrow Channel
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摘要: 对窄矩形通道内流动沸腾换热特性进行实验研究,拟合出沸腾换热系数计算关系式。使用不同的沸腾换热预测模型计算窄矩形通道的沸腾换热系数并将预测值与实验值进行对比,结果表明:各关系式预测窄矩形通道的沸腾换热系数,预测效果都不同程度地存在一些问题。根据Schrock-Grossman模型并以强迫对流沸腾换热原理为基础,建立了窄矩形通道沸腾换热系数的预测模型,与实验数据符合良好。Abstract: Flow boiling heat transfer experiments were performed in a rectangular narrow channel,and a new correlation was developed for predicting the boiling heat transfer coefficient.Different models for flow boiling heat transfer were used to predict the boiling heat transfer and the values were compared against the experimental database.The results show that Chen correlation and Lazarek-Black correlation could not well predict the boiling heat transfer coefficient of the rectangular narrow channel,and the Kim and Mudawar correlation is the best method among the models.A new correlation is developed based on the Schrock-Grossman model and the mechanism of forced convection boiling heat transfer.The correlation can well predict the boiling heat transfer coefficient.
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