水泵吸水口临界淹没深度及其近场水力特性试验研究  

Experimental Study of Critical Submerged Depth and Near Field Hydraulic Characteristics of Pump Suction

作　　者：何耘[1] 刘成 

机构地区：[1]中国水利水电科学研究院,北京100038 [2]国际泥沙研究培训中心,北京100048

出　　处：《西安理工大学学报》2010年第1期92-96,共5页Journal of Xi'an University of Technology

摘　　要：通过试验观测水泵吸水管附近旋涡生成、发展的过程,得到了吸水口临界淹没深度与流量的关系式;同时应用粒子图像测速(PIV)技术,对吸水口近区流场进行了多方位、多断面连续拍摄,获取了全场瞬时及时均的流速场和涡量场,定量显示了吸水口周围流速分布、旋涡位置及大小等水力特性。The formation and development process of all kinds of the vortices around the pump suction were observed via the experiments so as to obtain the empirical equation between the critical submerged depth of pump suction and flow.Planes of near field flow around the pump suction with different orientations and different positions were photographed by using Particle Image Velocimetry（PIV） technique whereby obtaining plenty of instantaneous and time averaged velocity fields and vortex fields.The hydraulic characteristics of velocity distribution,vortex location,size and strength of near filed flow in the vicinity of pump suction were quantificationally presented.

关 键 词：旋涡 吸水口临界淹没深度 PIV技术 流速场 涡量场 

分 类 号：TV136.2[水利工程—水力学及河流动力学]