TY - GEN
T1 - The study on energy dissipation of two-jet with varying spacing on a plunge pool based on CFD
AU - Jiao, Aiping
AU - Liu, Peiqing
AU - Liu, Xianliang
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - 2 phase water-air flow
KW - Energy dissipating rate
KW - Plunge pool
KW - Time average flow energy
KW - Turbulence numerical simulation
UR - https://www.scopus.com/pages/publications/84903438614
U2 - 10.1007/978-3-540-89465-0_292
DO - 10.1007/978-3-540-89465-0_292
M3 - 会议稿件
AN - SCOPUS:84903438614
SN - 9783540894643
T3 - Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS
SP - 1694
EP - 1698
BT - Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS
PB - Springer Berlin Heidelberg
T2 - 16th Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research, APD 2008 and the 3rd IAHR International Symposium on Hydraulic Structures, ISHS 2008
Y2 - 20 October 2008 through 23 October 2008
ER -