多喷嘴液液引射器的试验与数值模拟研究
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摘要
采用控制变量法,模拟研究了不同进出口压力等因素对多喷嘴液液引射器性能及增压效果的影响规律。结果表明,在引射泵组中,随着工作压力和引射压力增大,引射器的引射系数和引射流量都增大;而随着出口压力增大,引射器的引射系数和引射流量减小;引射器出口压力的增加对引射泵组中的泵前增压效果优于工作压力和引射压力;泵前压力随引射器进出口压力的增大而增大。试验在综合考虑泵的效率和增压效果后,采用30%回流率,引射泵组可提高1.59 m压头,与模拟结果 1.54 m吻合较好。
Using control variable method the effect of different inlet and outlet pressure on the performance and supercharging effect was simulated. The results showed that along with the increase of working pressure and injection pressure in the ejector pump group,the entrainment coefficient and flow rate increased; howerver with the increase of outlet pressure,the entrainment coefficient and the flow rate decreased; the effect of outlet pressure on front pump pressure was better than that of working pressure and injection pressure; the front pump pressure increased with the increase of inlet and outlet pressure. After considering pump efficiency and supercharging effect,the test used 30% backflow rate,the ejector pump group could improve 1. 59 m pressure head,which agreed well with simulation result 1. 54 m.
Using control variable method the effect of different inlet and outlet pressure on the performance and supercharging effect was simulated. The results showed that along with the increase of working pressure and injection pressure in the ejector pump group,the entrainment coefficient and flow rate increased; howerver with the increase of outlet pressure,the entrainment coefficient and the flow rate decreased; the effect of outlet pressure on front pump pressure was better than that of working pressure and injection pressure; the front pump pressure increased with the increase of inlet and outlet pressure. After considering pump efficiency and supercharging effect,the test used 30% backflow rate,the ejector pump group could improve 1. 59 m pressure head,which agreed well with simulation result 1. 54 m.
引文
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[2]温懋,张雷,韩昊,等.利用水喷射技术防止水泵的汽蚀[J].可再生能源,2010,28(2):145-147.
[3]陆宏圻.射流泵技术的理论及应用[M].北京:水利电力出版社,1989.
[4]陆宏圻,曾祥金.液体射流泵理论的研究[J].中国科学,1981(1):119-130.
[5]朱祖超.提高高速泵气蚀性能的理论分析与试验研究[J].机械工程学报,1999,35(6):85-88.
[6]吴昱,朱祖超.利用引射结构提高离心泵的汽蚀[J].工程设计学报,2002,9(2):86-88.
[7]吴昱.引射离心泵的理论分析与试验研究[D].杭州:浙江大学,2003.
[8]崔宝玲,张剑慈,朱祖超,等.引射离心泵的试验研究[EB/OL].北京:中国科技论文在线[2004-10-27].http://www.paper.edu.cn/releasepaper/content/200410-55.
[9]赵良举,李德胜,李斌,等.引射式增压装置的设计与试验研究[J].工程热物理学报,2008,29(8):1283-1286.
[10]龙新平,姚鑫,杨雪龙.多孔喷嘴射流泵流动模拟与涡结构分析[J].排灌机械工程学报,2012,30(2):136-140.
[11]LONG X,ZHANG J,WANG Q.Experimental investigation on the performance of jet pump cavitation reactor at different area ratios[J].Experimental Thermal&Fluid Science,2016,78:309~321.
[12]袁丹青.多喷嘴射流泵流场的数值模拟及试验研究[D].镇江:江苏大学,2009.
[13]刘传超.液液喷射器引射结构的数值模拟及优化研究[D].青岛:中国海洋大学,2015.
[14]肖杨杨,叶立,杨秋香,等.PEMFC发动机系统氢气喷射器流场模拟及性能分析[J].能源工程,2016(6):27-33.