射流泵喷嘴收缩角的取值  

Value of nozzle falloff angle of jet pump

作　　者：吕忠斌[1] 王洋[1] 刘洁琼[1] 曹璞钰[1] 李贵东[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2015年第3期281-287,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：国家科技支撑计划项目(2011BAF14B01);江苏高校优势学科建设工程项目(BK2009218)

摘　　要：为了研究喷嘴收缩角对射流泵性能的影响,采用数值计算和试验研究相结合的方法,对浙江某公司生产的XDPm255A型射流泵进行了研究.根据Fluent的数值模拟结果,在射流泵不同面积比下,分析不同的喷嘴收缩角对射流泵内部流场以及外特性的影响.通过数据拟合,进一步得到面积比在2.01~5.06时射流泵喷嘴收缩角在高效区取值的拟合趋势线,并对其进行试验验证.结果表明：当射流泵的面积比一定时,对应不同的喷嘴收缩角均存在1个最优流量比,其可使射流泵的效率达到最高;当面积比增大时,最优流量比也随之增大;射流泵高效区喷嘴收缩角取值拟合趋势线是可靠的.In order to obtain the influence of nozzle falloff angle on jet pump,the jet pump of XDPm255 A from a company in Zhejiang was investigated based on the combination of numerical calculation and experimental research. According to numerical results of Fluent,the influence of nozzle falloff angle on internal flow field and external characteristic of jet pump in different area ratio was analyzed. By data fitting,the fitting trendline of nozzle falloff angles in high efficiency area with area ratio from 2. 01 to 5. 06 was realized and verified by experiments. The results show that when the area ratio of jet pump is constant,there is an optimal flow ratio to obtain the maximum efficiency of jet pump for each nozzle angle.As the area ratio increases,the optimal flow ratio increases. The reliability of the fitting trendline of nozzle falloff angles in high efficiency area was validated by test results.

关 键 词：射流泵 喷嘴收缩角 数值计算 面积比 流量比 

分 类 号：TH311[机械工程—机械制造及自动化]