矩形截面微通道内饱和沸腾传热系数的预测

The Prediction on the Saturated Boiling Heat Transfer Coefficient in Rectangular Section Micro-channel

通过观察矩形截面微通道内饱和沸腾传热实验的流型特点,并在前人的基础上,推导出适用于预测矩形截面微通道沸腾传热系数的物理模型——四区模型。采用该物理模型对矩形截面微通道内饱和沸腾传热系数进行预测,并采用最小二乘法进行拟合,结合实验数据对其进行最优处理,得到一组新的经验参数。最后利用该参数对矩形截面微通道内饱和沸腾传热系数进行预测计算,并将计算结果与实验数据进行对比、分析,结果显示了88.46%的数据误差在20%之内,平均误差为10.33%,吻合度较好。

Through observing the flow pattern features of saturated boiling heat transfer experiment in rectangular section micro-channel,this paper inferred four-region model of physical model suitable for predicting the saturated boiling heat transfer coefficient in rectangular section micro-channel.This physical model was adopted for predicting the saturated boiling heat transfer coefficient in rectangular section micro-channel,and the least square method was used for fitting.Combined with the experimental data,the optimal treatment was conducted to obtain a set of new empirical parameters that was used for predicting the saturated boiling heat transfer coefficient in rectangular section micro-channel.The computed results were compared with the experimental data,and the results showed that 88.46% of data error was within 20% with average error of 10.33%,which had well goodness of fit.