Design and numerical simulation of upstream flow channel in gate station based on Star CCM+
XU Jie1, SHI Wei2, YUAN Shouqi1, LI Yanjun1, LI Yaling1*
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China;2. The Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co. Ltd., Nanjing, Jiangsu 210029, China
Abstract：In order to study the influence of flow pattern in an upstream flow channel on the operation of gate station, a large gate station was used as the research object, and numerical simulations of flow in the upstream channel of the station were carried out based on Star CCM+ software. It was found that there are many large vortices in the upstream flow channel in pump station operating mode, resulting in a poor uniformity of velocity in the inlet to the pump due to asymmetry of the channel and change in the cross-sectional area. To remove the unfavorable flow patterns in the inlet flow channel, the upstream flow channel was redesigned by altering channel diffusion angle, channel curvature profile, and flow conditioner length. Their effects on the hydraulic performance of channel were analyzed comparatively. The results show that a smaller flow channel diffusion angle in the pump intake can significantly eliminate the vortex in the flow channel. Specially, when the diffusion angle is 10°, the velocity deviation angle is the smallest and the inflow is the most uniform at the pump inlet. A properly extended straight line channel profile can make the streamlines in the flow channel even smooth. A slightly extended flow conditioner length can suppress the dead water vortex area in front of the flow passage, but the flow conditioner can also worsen the pump inlet flow condition and allow the vortex size in the primary flow to be enlarged.
徐捷,施伟,袁寿其,李彦军,李亚林*. 基于Star CCM+的闸站上游流道方案设计与数值模拟[J]. 排灌机械工程学报, 2021, (1): 37-43.
XU Jie,SHI Wei,YUAN Shouqi,LI Yanjun,LI Yaling*. Design and numerical simulation of upstream flow channel in gate station based on Star CCM+. Journal of Drainage and Irrigation Machinery Engin, 2021, (1): 37-43.