1. Fluid Machinery Engineering Research Center, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Power and Me- chanical Engineering, Wuhan University, Wuhan, Hubei 430072, China ; 3. School of Power and Mechanical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China）
Abstract：The complicated inner flow state of the liquid jet gas pump is numerically and experimentally studied. To simplify the problem, the computational domain was divided into two blocks： the pump throat and the diffuser. Jet flow in the throat was simulated by parabolic equations with the control volume method, and the equations were solved by tridiagonal matrix algorithm. In the diffuser, where the flow state is bubbly flow, equations were established by the two-fluid model, the discretization Scheme was the hybrid finite analysis method, and the equations were solved by SIMPLE algorithm. The velocity distribution and the position where jet breakup takes place were obtained. The calculated wall pressure distributions were in good agreement with the experimental data, which shows that the simulation results can reflect the external hydraulic characteristics for the liquid jet gas pump.
2008, Vol. 29 
