THE STUDY ON ENERGY DISSIPATION OF TWO-JET WITH VARYING SPACING ON A PLUNGE POOL BASED ON CFD
Unsteady incompressible flowing N-S equation, RNG k-ε turbulence model, and VOF (Volume of Fluid) method have been adopted to numerically simulate the flow structure of two-jet with varying spacing on a plunge pool, with reference to the Xiluodu double curvature arch dam. The variable law of time average flow energy and dissipating rate of two-jet with different spacing shooting into a plunge pool have been computed and analyzed. The results show that for the two-jet into a plunge pool, flow energy is mostly used up at submerged jetting section, the change of jet flow spacing produces a little influence on the time average energy dissipating rate of the upstream flow, whereas, big influence on that of the downstream flow, the smaller jet spacing is, the larger the energy dissipating rate of the downstream flow will be. Therefore, if the flow is discharged from a dam in layers, after satisfying the requirements of fully functioning of hydrodynamic cushion, relatively small jet spacing shall be adopted as it can be to further raise time average energy dissipating rate at submerged jetting section. This study can offer reference to the optimum design of a plunge pool and appreciate layout of a dam outlets.
plunge pool time average flow energy energy dissipating rate 2 phase water-air flow turbulence numerical simulation
Aiping Jiao Peiqing Liu Xianliang Liu
The Institute of Fluid Mechanics, Beijing University of Aeronautics and Astranautics, Beijing, 10008 The Institute of Fluid Mechanics, Beijing University of Aeronautics and Astranautics, Beijing, 10008 Yellow River Conservancy Technical Institute, Kaifeng 475001, China
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
1694-1698
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）