HUANG Xianbei1, XI Chaonan1, DONG Zhaohua2, QIU Baoyun1*,PANG Kaiwen1,GUO Qiang1
1. College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; 2. Jiangsu Provincial Irrigation Canal Management Office, Huai′an, Jiangsu 223200, China
Abstract：Taking the intake model as the research object, this study explored effective methods for controlling the air-entrained vortex. Based on computational fluid dynamics(CFD)technology, the suppression effects of two methods, namely the wave-dissipation plate and curtain wall, on the air-entrained vortex were analyzed, with a focus on the influence of key geometric parameters. Using the open-source CFD software OpenFOAM for numerical simulation, the three-equations Bifurcation turbulence model was used to solve the turbulence field, the CLSVOF method was used to capture the gas-liquid interface. The calculation results were processed and compared from multiple perspectives such as air-entrained vortex shape, vorticity, streamline, and air-entrainment rate at outlet. The research results indicate that a curtain wall with a depth of 0.25D1 can effectively suppress the air-entrained vortex in the intake, and the air-entrainment rate can be reduced by half. As the depth of the curtain wall increases, the suction rate increases. The wave-dissipation plate proposed in the field of ocean enginee-ring can only delay the appearance and development of the air-entrained vortex, but cannot have a suppressive effect. When the center position and length of the plate remaine unchanged, changing the width of the plate has no significant inhibitory effect on the vortex. The research results can provide certain reference and guidance for the optimization design of intakes and related engineering facilities.
