1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2. Cooperative Innovation Center for Water Safety & Hydro Science, Hohai University, Nanjing, Jiangsu 210098, China
Abstract：Transverse water intake along the Bank of open channel is a common form of water intake. At the junction of the main channel of open channel and transverse intake, the transverse water intake is liable to generate vortices, which resulting in the reduction of water intake efficiency. The influencing factors and mechanism need to be further explored. Based on the VOF method, a 3D numerical model of a horizontal water intake project in Southern China is established. Numerical simulation of the vortex induced by the transverse water intake process is carried out to explore its mechanism. At the same time, the influence of arc radius, main channel and water intake velocity on the vortex is quantitatively analyzed, which is verified by physical model test. The results show that due to the sudden diffusion of the river, the water flow in the transverse water intake connecting section breaks away from the side wall and is easy to form vortices. At the same time, the arc radius of the connecting section, the main channel and the water intake velocity all have effects on the generation, dissipation and shape of the vortex zone. When the arc radius of the connecting section becomes larger and the velocity of the main channel and water intake becomes smaller, the radius of a single vortex becomes smaller and the existence time of the whole vortex zone will be shortened, and the existence range of the whole vortex zone will be narrowed. The study further deepens the hydraulic mechanism of the transverse water intake and provides technical support for the optimization design of the transverse water intake.
张天翔,俞晓东,贺蔚,张健,肖洋,. 明渠横向取水旋涡影响因素数值模拟及试验研究[J]. 排灌机械工程学报, 2021, 39(5): 464-470.
ZHANG Tianxiang,YU Xiaodong,HE Wei*,ZHANG Jian,XIAO Yang,. Numerical simulation and experimental study on influence factors of transverse intake vortex in open channel. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(5): 464-470.
