摘要
基于CAD-CFX联合计算方法,分别开展了淮安二站二期泵闸工程进水流道肘形收缩区不同设计体形下进水流道内的流场分布计算以及水力特性分析。结果表明,流道肘形收缩区内圆半径增大,则流速水平减小,但过大或过小的内圆半径设计方案,会导致收缩区内、外侧流速矢量方向不一致;当内圆半径增大,收缩区内上、下压力场压力差值减小,压力场梯度差减弱。通过引入流道水头损失、流速均匀度以及入泵水流加权平均角3个水力参数,认为流道收缩区内圆半径1.2 m最为适宜,有助于控制流道运营安全与渗流稳定。
Based on the CAD-CFX joint calculation method,the flow field distribution and hydraulic characteristics analysis in the elbow contraction zone of the inlet channel of the Huai'an Second Station Phase II pump gate project were carried out under different design shapes.The results indicate that as the radius of the inner circle in the elbow contraction zone of the flow channel increases,the horizontal flow velocity decreases.However,design schemes with excessively large or too small inner circle radii can lead to inconsistent flow velocity vector directions inside and outside the contraction zone.As the radius of the inner circle increases,the pressure difference between the upper and lower pressure fields in the contraction zone decreases,and the pressure field gradient difference weakens.By introducing three hydraulic parameters:channel head loss,flow velocity uniformity,and weighted average angle of inlet water flow,it is believed that a radius of 1.2m within the contraction zone of the channel is most suitable,which helps to control the safety of channel operation and seepage stability.
作者
施翔
龚志诚
沈冲
SHI Xiang;GONG Zhicheng;SHEN Chong(Jiangsu Hongze Lake Water Conservancy Engineering Management Office,Huai'an 223100,China)
出处
《广东水利水电》
2025年第3期15-18,46,共5页
Guangdong Water Resources and Hydropower
关键词
泵站
进水通道
流速
压力场
水力特性
pumping station
water inlet channel
flow rate
pressure field
hydraulic characteristics
