有液滴卷吸时的环状流换热系数的预测模型

PREDICTION MODEL OF ANNULAR FLOW HEAT TRANSFER COEFFICIENT WHEN CONSIDER LIQUID DROP ENTRAINMENT

本文对垂直上升光管中环状流流动沸腾的理论模型进行了分析，以液膜紊流的动量方程和能量方程为基础，推导了环状流的数学模型，通过求解动量方程和能量方程，获得了流动沸腾换热系数的预测模型，并对该预测模型进行了数值求解，将预测的换热系数同实验值作了比较。

The present paper analyzes the theoretical model of upward annular flow boiling heat transfer in vertical smooth tube. Based on the liquid film turbulent flow momentum and energy equations, the mathematical model of the annular flow is derived. By solving the equations, the prediction model of annular flow heat transfer coefficient is obtained. The model is numerically solved. The predicted results are compared with the experimental results. Good agreements between the predicted and experimental results are obtained. This confirms the rationality of the prediction model of annular flow heat transfer coefficient.