喷管内临界泡状流计算分析  

NUMERICAL SIMULATION OF CRITICAL BUBBLY NOZZLE FLOWS

作　　者：付英杰[1] 魏英杰[1] 张嘉钟[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《工程力学》2010年第4期51-56,67,共7页Engineering Mechanics

摘　　要：基于均质混合流模型,引入Rayleigh-Plesset方程考虑气泡动力学作用,采用拉格朗日有限体积法,进行喷管内非稳态泡状流计算。分析临界泡状流的特性,并把流场计算结果与相关实验数据对比,吻合较好。将不同边界条件下的临界泡状流计算结果进行对比分析,得到了入口含气率、压力及初始气泡半径对临界泡状流动的影响。结果表明:临界入口速度随着入口含气率的增大而减小,而随入口压力、初始气泡半径的增大而增大。The unsteady bubbly flows through converging-diverging nozzle are studied numerically using Lagrangian finite volume scheme and homogeneous bubbly mixture model. The model accounts for bubble dynamics by Rayleigh-Plesset equation. Calculations of critical bubbly flows are performed and reasonable agreements with experiment results are observed. The critical bubbly flow fields with different boundary conditions are simulated, and the influences of initial bubble radius, inlet pressure and initial void fraction on the critical inlet velocity are discussed. The results show the critical inlet velocity increases with the increasing inlet pressure, initial bubble radius, and the decreasing initial void fraction.

关 键 词：缩放喷管 临界泡状流 数值模拟 均质混合流模型 Rayleigh-Plesset方程 

分 类 号：O359[理学—流体力学]