|
|||||
|
|
Computational fluid-dynamics-based analysis of a ball valve performance in the presence of cavitation |
|
| Authors: | A S Tabrizi M Asadi G Xie G Lorenzini C Biserni |
| Institution: | 1. Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran 2. Department of Mechanical Engineering, Azad Islamic University Science and Research Branch, Tehran, Iran 3. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, 710129, P.R. China 4. Department of Industrial Engineering, University of Parma, Parco Area delle Scienze 181/A, Parma, Italy 5. Department of Industrial Engineering, University of Bologna, viale Risorgimento 2, Bologna, Italy |
| Abstract: | In this paper, the ball valve performance is numerically simulated using an unstructured CFD (Computational Fluid Dynamics) code based on the finite volume method. Navier-Stokes equations in addition to a transport equation for the vapor volume fraction were coupled in the RANS solver. Separation is modeled very well with a modification of turbulent viscosity. The results of CFD calculations of flow through a ball valve, based on the concept of experimental data, are described and analyzed. Comparison of the flow pattern at several opening angles is investigated. Pressure drop behind the ball valve and formation of the vortex flow downstream the valve section are also discussed. As the opening of the valve decreases, the vortices grow and cause higher pressure drop. In other words, more energy is lost due to these growing vortices. In general, the valve opening plays very important roles in the performance of a ball valve. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |