排灌机械工程学报2024，Vol.42Issue(7)：663-669,7.DOI:10.3969/j.issn.1674-8530.22.0224
地下泵站进水流道数值模拟与方案优化
Numerical simulation and design optimization on flow passage of underground pump station
摘要
Abstract
Taking the flow passage of an underground pump station as a case study,the numerical si-mulation model were established.The hydraulic performance and defects of designed layout was ana-lyzed,moreover,the optimal layout was presented.The results show that the flow separation occurres at the entrance of inlet pipe in the designed layout,which resultes from the large intersection angle of 70° between the inflow direction and the connection line from the center of inlet pipe entrance to that of the circular tunnel outlet.The head loss coefficient reaches 2.31-2.44,while the flow velocity distribu-tion uniformity and velocity weighted average angle are 95.09％-96.80％and 86.51°-87.41°,respec-tively.The pressure tank connectes the foregoing circular tank using sudden expansion cross-section and the following inlet pipe using abrupt contraction,without any guidance structure,which lead to large head loss coefficient.The optimal layout adoptes manifold tube and branch pipes to distribute wa-ter flow and two 60° elbows to offset the flow.There is no sudden expansion or contraction structure,and the head loss coefficient is largely reduced to 0.93-1.07.The hydraulic performance is improved,and the excavation and lining of pressure tank are avoided.The research results can serve as guidance for other similar projects.关键词
地下泵站/进水流道/水力性能/评价指标/数值模拟Key words
underground pump station/flow passage/hydraulic performance/evaluation index/numerical simulation分类
农业科技引用本文复制引用
李甲振,王涛,薛兴祖,郭永鑫,付辉,纪昌知..地下泵站进水流道数值模拟与方案优化[J].排灌机械工程学报,2024,42(7):663-669,7.基金项目
国家自然科学基金资助项目(52179082,51609265) （52179082,51609265）
国家重点研发计划项目(2016YFC0401808) （2016YFC0401808）
