基于气液界面能量模型的冷凝不稳定性分析  

Instability analysis of vapor-liquid condensation flow based on interface energy model

作　　者：臧国军[1,2] 李佩[2] 赵宏涛[2] 刘刚[1] 张鸣远[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]中国石油长庆油田分公司第一输油处,陕西西安710021

出　　处：《化学工程》2015年第5期20-24,共5页Chemical Engineering(China)

摘　　要：建立了管道内冷凝诱发的段塞流生成与演化动力学模型。在分析前人的研究成果基础上考虑传热的因素,预测了冷凝流动过程中分层流向段塞流等不稳定流型转化的界限,在预测过程中将光滑分层流模型和从能量角度考虑的界面模型联合起来求解流动过程中的截面含气率,并将结果同前人(Cavallini,2003)使用实验关联式求解截面含气率来分析分层流不稳定性模型的结果进行了比较。研究结果表明:新建立的模型在较大管径下,干度x>0.25时,模型与Cavallini(2003)的模型较吻合;同时,选取不同的质量流速初值qm对建立的模型的计算结果的影响可以忽略不计。A dynamic model of the formation and evolution of condensation-induced slug in pipes was proposed. On the basis of previous researches, this study predicted the transition from a stratified flow to a slug flow during condensation inside tubes. Smooth stratified flow model and interface energy model were employed to obtain the void fraction. The results were compared with Cavallini （2003） model in which experimental correlations were used to get the void fraction. It concludes that when the vapor quality is larger than 0.25 and the pipe diameter is large enough, the present model agrees with the Cavallini （2003） model and the initial mass flux has little influence on the results of the present model.

关 键 词：冷凝 动力学模型 传热 段塞流 

分 类 号：O359[理学—流体力学]