摘要
根据南水北调东线工程邳州泵站的基本参数,基于进水流道三维湍流流动数值模拟方法,研究了竖井式进水流道控制尺寸对其水力性能的影响。揭示了竖井式进水流道长度、宽度和高度等控制尺寸对进水流道出口流速分布均匀度、流速加权平均角度和水头损失的影响规律和原因,并分析了流道内的流速分布情况。研究结果表明:控制尺寸对竖井式进水流道水力性能影响较为显著;控制尺寸的增加明显提高了竖井式进水流道的水力性能,当增加至一定值后,影响趋于平缓;邳州泵站竖井式进水流道方案控制尺寸取值合理,水流收缩平顺均匀、流线层次分明,流道内无任何脱流或旋涡等不良流态,水头损失小。本项研究结果可为竖井式进水流道的水力设计、控制尺寸的合理确定提供理论依据。
According to the preliminary parameters of Pizhou pumping station in East Route Project of South-to- North Water Diversion, and based on the method of 3D turbulence flow numerical simulation for inlet conduit, the influence of the control size of the shaft inlet conduit on hydraulic performance has been studied. The influence of conduit control size including length, width and height on the velocity distribution, weighted average angle at the conduit outlet section and hydraulic loss has been revealed, and the velocity distribution in the conduit has been analyzed. The research results indicate that the control size has comparatively obvious influence on the hydraulic performance for the shaft inlet conduit; the increase of the control size improves the hydraulic performance of the conduit obviously, and its influence is going to be gentle after the size increases to a certain value; the control size of the shaft inlet conduit for the Pizhou pumping station is reasonable, the flow in the inlet conduit contracts smoothly and uniformly, and the stream line layers are clear; and there is no improper flow such as separation or vortex in the conduit, and the hydraulic loss is little. The analysis results can provide a theoretical basis for the hydraulic design as well as the control size of the shaft inlet conduit.
出处
《水利水运工程学报》
CSCD
北大核心
2014年第5期47-52,共6页
Hydro-Science and Engineering
基金
国家自然科学基金青年基金资助项目(51309200)
中国博士后科学基金资助项目(2013M540469)
江苏省博士后科研基金资助项目(1301021A)
关键词
贯流泵装置
竖井式进水流道
控制尺寸
水力性能
数值模拟
tubular pump unit
shaft inlet conduit
control size
hydraulic performance
numerical simulation
