摘要
建立了一种新的水气两相紊流数学模型 ,其中对流速、气体质量分数以及紊动特征量采用了质量加权的时间平均 ,对雷诺应力采用代数应力方程模拟 ,对气体质量分数的脉动通量采用涡粘性概念模拟 ,气体质量分数由其控制方程求解。通过对明渠掺气水流和水垫塘掺气射流的数值模拟表明 ,计算结果与实验结果符合较好 ,同时 ,计算的时间和收敛性也较好。
WT5”BZ]A mathematical model of the air water two phase flow was developed, where the mass weighted averaging was adopted for the velocity, the air mass concentration, the turbulent energy and the turbulent energy dissipation rate. The algebraic equations of the Reynolds stresses were employed to solve the turbulent stresses. The eddy viscosity was used to calculate the turbulent transport of the air mass fraction, and the air mass fraction was solved by its controlling equation. The numerical modeling of the air water two phase flows in a open channel and a phunge pool shows that the calculated air concentration distribution and pressure distribution are in reasonable agreement with the measured data. [WT5HZ]
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2001年第2期225-229,共5页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金!资助项目 ( 5970 90 0 4 )
关键词
水气两相流
数学模型
掺气浓度
水利工程
air water two phase flow
mathematical model
air concentration
