大型供水泵站吸水池模型流场PIV测试

Using PIV Method to Measure Flow Field in Model Cistern of Large-scale Pumps Station

针对大型自来水系统使用的供水泵空蚀严重问题 ,结合北京自来水九厂的实际情况 ,按比例制造了吸水池模型 ,采用 PIV测量技术测量和分析了该吸水池中水流流态。根据试验结果分析了吸水池设计中来水管和水泵吸入管在布置上不对称 ,以及在低水位运行时淹没深度过小等问题对水泵空化性能产生的影响。为优化水泵空化性能 ,针对泵站吸水池的设计提出建议 :来水管和水泵吸入管在结构布置上要一一对应 ;

To the question of the frequent appearance of cavitations in the pumps used in the large scale waterworks, combining with the real working surroundings of pumps station in the Beijing Ninth Water Supply Plant, the cistern model by appropriate scale was set up, take advantage of the PIV measuring technology to measure and analyze the flow field in the cistern model. According to the experiment result, the impact on the cavitations in pumps caused by the inapposite structure disposition of input and output of pipe and run time impropriety of insufficient submerge depth was analyzed, advices for the cistern design are as follows: input and output of pipe in cistern should be arranged correspondingly; the entrance plane of input pipe in cistern should be parallel to the underside of cistern.