水气二相流特点及其单流体模型  

Behaviors of Air-Water Two-Phase Flow and Its Homogeneous Model

作　　者：谭立新[1] 许唯临[2] 杨永全[2] 魏文礼[1] 李建中[1] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]四川大学高速水力学国家重点实验室,四川成都610065

出　　处：《西安理工大学学报》2000年第3期280-283,共4页Journal of Xi'an University of Technology

基　　金：国家自然科学基金!( 5970 90 0 4 );四川大学高速水力学国家重点实验室开放基金!资助项目( 990 7)

摘　　要：对水利工程中掺气水流的数值模拟进行了研究。从建立数学模型的角度 ,详细分析了水利工程中水气二相流的特点 ,从理论上证明 :对工程中常见的稀疏气泡流 ,单流体模型是可行的 ;且水气混合物的连续方程和动量方程可分别用水相的连续方程和动量方程代替 ,以使问题简化。提出了掺气水流的单流体模型 ,并用该模型对水垫塘掺气水流进行了计算 ,掺气浓度计算值与实测值基本吻合 。This paper deals with the numerical simulation of aerated flow and analyses the behaviors of air water two phase flow in details in water conservancy works from an angle of establishing maths models. It has been proved theoretically that the homogeneous model is applicable to the ′dilute bubbly flow′ in water works and that the continuity equation and momentum equation of air water mixture can be replaced by those of water so as to simplify the problems. The homogeneous model is used to calculate the aerated flow in the plunge pool. The calculated aerated concentration values are found to be basically in agreement with the actually measured values, whereby indicating that this model can be used in numerical simulation in air water two phase flow in plunge pool.

关 键 词：掺气水流 稀疏气泡流 单流体模型 水气二相流 

分 类 号：O359.1[理学—流体力学]