(1.Technical and Research Center of Fluid Machinery Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;2.Aerosun Corporation,Nanjing,Jiangsu 211100,China;3.GuoDian Science and Technology Institute,Nanjing,Jiangsu 210031,China)
Abstract：Considering the problem that the leakage of liquid seriously affects the safety of submersible pumps,an online device to resolve the harm of leakage of liquid to submersible pumps was designed.In order to compare the performance of two kinds of nozzles,expansion and non-expansion,4 different-sized distance of mixing tube to nozzle and 6 different-sized mixing tube diameter were designed.Experiments were done in the same test-bed.The results show that liquid leaking excluder devices with the expansion nozzle have better performance,the best distance of mixing tube to nozzle is 1.67 times the diameter of nozzle throat,and the best diameter is 2 times the diameter of nozzle throat.The liquid leaking excluder device after optimization can solve the problem of fluid leakage better.
[1]朱荣生,李继忠,付强,等.潜水泵泄漏液体在线排除装置的设计与开发[J].排灌机械,2008,26(5):5-8.Zhu Rongsheng,Li Jizhong,Fu Qiang,et al.Design and implementation of online liquid leaking excluder device for submersible pump[J].Drainage and Irrigation Machinery,2008,26(5):5-8(in Chinese)[2]陆宏圻.喷射技术理论及应用[M].武汉:武汉大学出版社,2004.[3]裴二荣,柴金城.喷嘴水力性能分析及设计[J].排灌机械,2004,22(5):29-31.Pei Errong,Cai Jincheng.Research on the flow characteristic of spray nozzle and design[J].Drainage and Irrigation Machinery,2004,22(5):29-31.(in Chinese)[4]Chuech S G,Chen C C,Lu J C,et al.Design and implementation of ejector driven micropump[J].Energy Conversion and Management,2007,48(10):2657-2662.[5]Cramers P H M R,Beenackers A A C M.Influence of the ejector configuration,scale and the gas density on the mass transfer characteristics of gas-liquid ejectors[J].Chemical Engineering Journal,2001,82(1-3):131-141.[6]Kumar R S,Kumaraswamy S,Mani A.Experimental investigations on a two-phase jet pump used in desalination systems[J].Desalination,2007,204(1-3):437-447.[7]Rogdakis E D,Alexis G K.Investigation of ejector design at optimum operating condition[J].Energy Conversion & Management,2000,41(17):1841-1849.
