摘要
针对田山一级泵站采用闸门控制前池与进水池水位形成闸下射流的引水特点,提出了改善前池与进水池水流流态的不同整流方案。采用雷诺时均N-S方程结合标准k-ε的湍流模型,对不同整流方案的前池与进水池水流流态进行数值模拟,分析并选择了合适的整流工程措施。模拟结果表明,采用非连续底坎、非连续挑流坎与压水板三种整流措施相结合的方案后,整个前池与进水池内的流态得到较好地改善,池底部及水泵进口处的流速明显减小且能够有效避免与减小前池内、底坎与挑流坎后的泥沙淤积。现场试验证明,在实施整流措施后,明显消除了机组振动,提高了泵的运行效率,池内泥沙淤积基本消除。研究成果可为沿黄类似泵站前池和进水池的改造提供重要的科学依据。
At the Tianshan first-grade pumping station, water level of the forebay and suction sump is controlled by a sluice at the forebay inlet. To improve flow patterns formed by the jet under the sluice, the RANS equations and a standard k-ε turbulence model are used to simulate the flow and to study different schemes. Simulation results show that the most effective scheme is the one combining three engineering measures, non-continuous bottom sills, non-continuous trajectory sills and pressurized water plate. In this scheme, the overall flow in the forebay and suction sump is improved with smaller velocities near the bottom and around the pump inlet. Sediment accumulations in the forebay and behind the bottom sills and trajectory sills are avoided or decreased. Field test showed that since the proposed schemes were adopted, pumping station vibrations have been redficed obviously, operating efficiency of the pump increased, and sediment accumulation decreased. These results provide important data for renovation of foreby and suction sump of the pumping stations on Yellow River.
出处
《水力发电学报》
EI
CSCD
北大核心
2011年第2期54-59,共6页
Journal of Hydroelectric Engineering
基金
济南市科技攻关项目(061084)
水利部公益性行业科研专项经费项目(200801011)
关键词
水力机械
前池
进水池
数值模拟
hydraulic turbine
forebay
suction sump
numerical simulation
作者简介
高传昌（1957-），男，博士，教授．E-mail：lxywd2008@126．com
