中文摘要：

关于过冷流动沸腾气泡脱离点（或称充分发展沸腾起始点,FDB）的研究大多局限在实验研究,缺少预测气泡脱离点的数值模拟模型和方法.建立了数值模拟过冷流动沸腾气泡脱离点的数学模型,利用Fluent实现了对气泡脱离点的数值模拟,并且对矩形通道内的气泡脱离点进行了实验研究.为了验证数值模拟结果的准确性,分别对比了圆管、矩形通道内数值模拟结果和经典模型计算结果,并将双面加热矩形通道内数值模拟结果与实验结果进行对比.分析表明：根据本文模型,可以实现对过冷流动沸腾气泡脱离点位置的数值模拟,而且具有较高的准确度.源于圆管实验的Saha-Zuber模型和Bowring模型适用于双面加热矩形通道.

英文摘要：

Investigations of vapor bubble departure or fully developed boiling（FDB） in sub-cooled flow boiling are mostly confined to experimental research and the lack of models and methods for numerically simulating FDB.A mathematical model for simulating FDB is established in this study.Numerical simulation of FDB is further explored by utilizing a Fluent based on the model.The experiment of FDB in sub-cooled flow boiling in a rectangular channel is performed.In order to verify the accuracy of numerical simulation,comparisons of simulation results,were calculated by using classical models in circular and rectangular channels respectively.Besides,the simulation results of a two-side heated rectangular channel are compared with experimental results.Analysis shows that based on the established model,FDB can be predicted with a higher precision through numerical simulation.The Saha-Zuber model Bowring model,which were originally used for experiment of circular channels,are suitable for two-side heated rectangular channels.