【作者】 刘振宇； 吴慧英；

【Author】 Zhenyu Liu,Huiying Wu~* (School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,200240)

【机构】 上海交通大学机械与动力工程学院；

【摘要】 本文采用数值方法研究膜状冷凝传热传质问题,以板式冷凝换热器为应用背景,基于VOF方法建立平行平板通道内冷凝传热预测数值模型,膜状冷凝现象模拟通过在VOF模型守恒方程中施加源项实现。通过数值分析研究,对影响冷凝传热过程的各项因素进行了讨论分析。分析结果表明,冷凝传热的增强可通过增加表面张力、提高入口蒸汽速度以及降低壁面温度实现。更多还原

【Abstract】 In this work,the numerical method has been adopted to study the filmwise condensation heat transfer,in which the plate heat exchanger is applied as a condenser.A computational model has been developed to predict condensation heat transfer between vertical parallel plates using a VOF model.The UDF has been specifically developed to calculate the source terms associated with phase change.The predictions indicate that the condensation heat transfer increases with increasing surface tension,increasing vapor inlet velocity and decreasing wall temperature.更多还原