摘要
摘要：某闸站结合式侧向进水泵站进水池内存在的不良流态会危害到水泵机组的正常运行。采用CFD（Computational Fluid Dynamic）技术对原方案前池和进水池的流态进行了数值模拟，通过数值计算发现：1#-10#进水池内存在大尺度的回流，所有进水池后壁处均有水流旋转。针对上述不良流态，在进水池内设置了三种不同的组合整流措施。计算结果表明：方案4-三段型隔墩、立柱和后隔板组合措施的整流效果最好。该组合措施下，大范围的回流区消失，进水池横剖面上的轴向速度分布均匀，各特征线上的流速均匀度提高3-11个百分点，后壁处的水流不再回旋，水流能对称均匀地流入吸水管，不良流态基本得到解决。该研究成果对其他同类泵站进水池的改造有一定的参考价值。
In one side-intake pumping station, unfavorable flow patterns in its forebay and sump existed, harming the operation of its pump units. CFD simulations by a commercial code revealed large-scale recirculations in sumps No. 1--No. 10 and water whirls along the semicircular back wall. To control these unfavorable flows, three sets of flow-control devices were installed in the sump. By CFD analysis and comparison of these control schemes, an effective scheme is to install diversion piers, a straight baffle plate, and two upright columns in the sump. As a result of this scheme, the large-scale recirculations disappear, the cross-sectional distribution of axial velocity in the sump is uniform with an increase of 3%-11% in flow uniformity, and the flow whirls around the back wall are also suppressed. The flows into all the suction pipes are distributed uniformly and symmetrically. This work would be applicable to intake sumps of similar pumping stations.
出处
《水力发电学报》
EI
CSCD
北大核心
2015年第1期207-214,共8页
Journal of Hydroelectric Engineering
基金
国家自然科学基金(51279173)
江苏省普通高校研究生科研创新计划(KYLX_1345)
江苏省重点实验室开放课题资助项目(K13021)
关键词
水力机械
组合整流
CFD
侧向进水
进水池
hydraulic machinery
combined rectification measures
CFD
side-intake
intake sump
