Three-dimensional numerical simulation in different flow conditions of hydro-brake
LI Chao1,2, MA Guangfei1,2*, LIU Deyou1,2, JIANG Chao1,2, FANG Yong1,2
1. Standard & Quality Control Research Institute, Ministry of Water Resources/Hangzhou Mechanical Design Research Institute, Ministry of Water Resources, Hangzhou, Zhejiang 310024, China; 2. Water Machinery and Remanufacturing Technology Engineering Laboratory of Zhejiang Province, Hangzhou, Zhejiang 310024, China
Abstract：In order to study the throttling effect and working characteristics of hydro-brake under different rainfall conditions and explore the throttling law, a three-dimensional numerical simulation was carried out to analyze hydro-brake by VOF model. The results show the greater the flow rate, the stronger the throttling capacity, but the higher water level that begins to produce throttling effects. And the throttling capacity further increases due to the direct impact on the hydro-brake, which consumes potential energy; the velocity distribution in the hydro-brake is different, but the velocity around the air zone in the center and the wall region is always low; the pressure has an eccentric layered distribution in the hydro-brake. And there is a negative pressure zone in the center, the greater the negative pressure zone is, the stronger the throttling capacity is. In the future research, the throttling effect can be improved by increasing the range of negative pressure area. The external and internal characteristics in different flow conditions, which can provide a theoretical basis and technical guidance for further research.
