摘要
针对泵站进水池在过渡过程中的水面波动现象,本文采用VOF模型对万家寨引黄工程北干线中的平鲁泵站进水池进行了三维流场计算,在对系统最小来流条件下三台泵运行时进水池稳态流场分析的基础上,采用UDF给定瞬态边界条件,对三台泵运行一台泵启动的动态过程进行了数值模拟。计算表明,由于进水池结构和进流方向的原因,泵站进水池流态有较明显的漩涡存在。在系统小流量来流条件下,现有溢流坎的设计可满足三台泵的运行需要,但如要更多水泵工作,需改变溢流坎设计(例如除去溢流坎)或控制出流以加大流入进水池的溢流量,满足运行水泵对流量的需要。
A VOF model was used for calculation of the flow in an inlet sump to study its water surface fluctuations at the flow transient stage of the Pinglu pumping station, located on the north main line of the Wanjiazhai Yellow River diversion project. The simulation was conducted for the low flow condition that one pump is at the startup stage while the other three keep running, on the basis of an analysis of the simulated steady flows in the sump. The results show that visible vortices occur in the sump owing to the existing structure and inflow direction, and the existing overflow bucket under the low flow into system can meet the requirement by the flow of three pumps running. If more pumps are put into operation, however, the overflow bucket should be modified （for example, remove it ） or the outflow should be controlled to increase the overflow into the inlet sump.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第6期244-249,255,共7页
Journal of Hydroelectric Engineering
关键词
水力机械
泵站
进水池
VOF模型
三维流场计算
hydraulic machinery
pumping station
inlet sump
VOF model
3D flow analysis
