向清江;恽强龙;李红;吴燕兰;
XIANG Qing-jiang,YUN Qiang-long,LI Hong,WU Yan-lan(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China)

• 1:江苏大学流体机械及工程技术研究中心

摘要(Abstract)：

结合液气射流泵的工作特点,介绍了其不同的应用场合时对泵具有不同的性能要求。以喉管/喷嘴面积比m为主要研究参数,在喉管长度固定情况下,对15种面积比(1.1025～110.25)单级液气射流泵工作性能进行了试验研究,结果显示面积比大小具有一定范围使泵正常工作,小面积比的液气射流泵可以得到较大的压力比,大面积比情况下可以得到较大的液气比。对于本文试验中给定的供水离心泵扬程大小和液气射流泵模型,以液气射流泵效率最高为衡量,存在最优面积比使泵效率最高,且该值与Cunningham经验公式变换后的计算值一致,同时试验得到小面积比情况下(m<4.41)合适的工作水压力值。试验结果为液气射流泵的工业应用提供依据。
The characteristics of the liquid jet gas pump's(LJGP) working performance were introduced,and its different performance should adapt to its different applications.The throat /nozzle area ratio m of LJGP is the main parameter that was studied in this paper.With the throat length fixed,the hydraulic performance experiments of single-stage LJGP were carried out with 15 kinds of area ratio(1.1025¹10.25).The results show that there is a range of area ratio that keeps the pump working normally.The smaller area ratio could bring about the larger pressure ratio,and the larger area ratio of LJGP could lead to a larger gas/ liquid volume flow ratio.Under the condition of the given model LJGP and the water supply centrifugal pump,and judging by the efficiency,there is an optimal area ratio value which make the LJGP working more efficiently,this value is consistent well with the calculating result of the transformed Cunningham's empirical formula,and as for the small area ratio(m<4.41),there is an appropriate working pressure value.The experiment results and the conclusions provide the basis for the LJGP's engineering applications.

关键词(KeyWords)： 液气射流泵;面积比;性能;效率
liquid jet gas pump;area ratio;hydraulic performance;efficiency

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50906034);; 江苏大学科研启动基金资助项目(09JDG049)

作者(Authors): 向清江;恽强龙;李红;吴燕兰;
XIANG Qing-jiang,YUN Qiang-long,LI Hong,WU Yan-lan(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China)

参考文献(References)：

• [1]陆宏圻.喷射技术理论及应用[M].武汉:武汉大学出版社,2004.
• [2]恽强龙,向清江,李红.几种异形喷嘴喷射的液气射流泵性能试验研究[J].流体机械,2011,39(11):8-11.
• [3]葛研军,葛强,阳俊.液气射流泵喉嘴距数值模拟及其最优范围确定[J].流体机械,2012,40(4):29-32.
• [4]苏吉鑫,陈正文,王永强,等.船用消防射流泵流场的数值分析[J].流体机械,2010,38(6):39-42.
• [5]Witte J H.Mixing shocks in two phase flow[J].Jour-nal Fluid Mechanics,1969,36(4):639-655.
• [6]Cunningham R G.Liquid jet pumps for two-phaseflows[J].Journal of Fluids Engineering,1995,117:309-316.
• [7]Neve R S.The Performance and modeling of liquid jetgas pumps[J].Int.J.Heat and Fluid Flow,1988,9(2):156-164.
• [8]高传昌.脉冲液体射流泵技术理论与试验[M].北京:中国水利水电出版社,2009.
• [9]刘明杰,戎轸.单喷嘴液气射流泵的实验研究[J].东南大学学报,1993,23(2):33-37.
• [10]乌俊,袁丹青,王冠军,等.射流泵的发展现状及展望[J].排灌机械,2007,25(2):65-68.
• [11]Senthil Kumar R,Mani A,Kumaraswamy S.Analysisof a jet-pump-assisted vacuum desalination system u-sing power plant waste heat[J].Desalination,2005,17(9):345-354.
• [12]郭金基,陈海,叶谋平,等.液-气喷射紊流混合装置的作用及其在环境工程的应用[J].中山大学学报,2001,40(4):28-31.
• [13]Mandal A,Kundu G,Mukherjee D.A comparative stud-y of gas holdup,bubble size distribution and interfacialarea in a downflow bubble column[J].Chemical Engi-neering Research and Design,2005,83(A4):423-428.
• [14]龙新平,朱劲木,梁爱国,等.射流泵喉管最优长度的数值计算[J].水利学报,2003,(10):14-18.