半径比对气液喷射器吸气量的影响研究
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摘要
气液喷射器是石油化工行业中广泛使用的设备,介绍了气液喷射器的研究情况和进展,建立了气液喷射器三维几何模型,并运用计算流体力学模拟方法对混合室与喷嘴出口半径比对喷射器吸气性能的影响规律进行了研究。研究结果表明,喷射器的吸气量随混合室与喷嘴出口半径比的增加先增大后减小,且取得最大吸气量时的半径比与工作流体在喷嘴出口处液相流速有关,喷嘴出口流速越高,比值越大。
Gas-liquid ejectors are widely used in petrochenical industry.The research and progress of the gas-liquid ejector are introduced.The three-dimensional geometric model of the gasliquid ejector is set up.The influence law of the radius ratio of the mixing chamber and the nozzle outlet on gas suction performance of the ejector is studied by using the computational fluid dynamics simulation method.The results show that the suction volume of the ejector increases first and then decreases with the increase of the ratio of the mixing chamber to the nozzle outlet radius,and the radius ratio of the maximum suction is related to the liquid velocity of the working fluid at the nozzle exit.The higher the flow velocity of the nozzle is,the larger the ratio is.
Gas-liquid ejectors are widely used in petrochenical industry.The research and progress of the gas-liquid ejector are introduced.The three-dimensional geometric model of the gasliquid ejector is set up.The influence law of the radius ratio of the mixing chamber and the nozzle outlet on gas suction performance of the ejector is studied by using the computational fluid dynamics simulation method.The results show that the suction volume of the ejector increases first and then decreases with the increase of the ratio of the mixing chamber to the nozzle outlet radius,and the radius ratio of the maximum suction is related to the liquid velocity of the working fluid at the nozzle exit.The higher the flow velocity of the nozzle is,the larger the ratio is.
引文
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[16]张峰,包家汉,梁海琴,等.特定条件下气-液喷射器结构合理性分析[J].机械研究与应用,2012(4):12-14.ZHANG F,BAO J H,LIANG H Q,et al.Rationality analysis on the structure of gas-liqulid ejector in a particular situation[J].Mechanical research&application,2012(4):12-14.
[2]耿利红,马新灵,魏新利,等.喷射器几何结构对压缩/喷射制冷循环性能的影响研究[J].高校化学工程学报,2015,29(5):1073-1081.GENG L H,MA X L,WEI X L,et al.Effects of ejector geometry on performance of compression/ejection refrigeration cycle[J].Journal of chemical engineering of Chinese universities,2015,29(5):1073-1081.
[3] Kandakure M,Gaikar V,Patwardhan A.Hydrodynamic aspects of ejectors[J].Chemical engineering science,2005,60(22):6391-6402.
[4] Li C,Li Y,Wang L.Configuration dependence and optimization of the entrainment performance for gas-gas and gas-liquid ejectors[J].Applied thermal engineering,2012,48(48):237-248.
[5] Zhang K,Zhu X,Ren X,et al.Numerical investigation on the effect of nozzle position for design of high performance ejector[J].Applied thermal engineering,2017,126:594-601.
[6] Sharma D,Patwardhan A,Ranade V.Estimation of gas induction in jet loop reactors:Influence of nozzle designs[J].Chemical engineering research and design,2017,125:24-34.
[7]秦敬轩,郑平,陈旭.不同出入口条件下气液喷射器喷射性能的数值模拟[J].过程工程学报,2017,17(3):469-476.QIN J X,ZHENG P,CHEN X.Numerical simulation of ejection performance of gas-liquid ejector under different inlet and outlet conditions[J].The Chinese journal of process engineering,2017,17(3):469-476.
[8]姚云,郭方飞,周波,等.气液喷射器内的气液流型分析[J].高校化学工程学报,2008,22(5):895-899.YAO Y,GUO F F,ZHOU B,et al.The flow regimes of gas-liquid flow in up-flow ejectors[J].Journal of chemical engineering of Chinese universities,2008,22(5):895-899.
[9]范军领,李帅,韩雷,等.回路反应器工业应用及研究现状[J].石油化工设备,2018,47(2):34-38.FAN J L,LI S,HAN L,et al.Industrial application and research status of jet loop reactor[J].Petro-chemical equipment,2018,47(2):34-38.
[10]李韶璞.喷射回路反应器中文丘里喷射器混合特性的研究[D].青岛:青岛科技大学,2018.LI S P.Study on mixing characteristics of Venturie jector in jet loop reactor[D].Qingdao:Qingdao University of Science and Technology,2018.
[11]吴伟烽,冯全科,向清江,等.气-液喷射器内两相流流型分析[J].核动力工程,2007(6):34-38.WU W F,FENG Q K,XIANG Q J,et al.Analysis of inner flow patterns in gas-liquid ejectors[J].Nuclear power engineering,2007(6):34-38.
[12]姚云,郭方飞,周波,等.喷射器内气-液两相流流型及其转换特性的研究[J].高校化学工程学报,2009,23(3):392-396.YAO Y,GUO F F,ZHOU B,et al.Study on the flow pattern and its transition character of gas-liquid two phase flow in ejectors[J].Journal of chemical engineering of Chinese universities,2009,23(3):392-396.
[13]郑平,秦敬轩,陈旭.气液喷射器喷射性能的数值模拟与优化[J].江苏大学学报(自然科学版),2017(1):30-36.ZHENG P,QIN J X,CHEN X.Numerical simulation and optimization of ejection performance for gas-liquid ejector[J].Journal of Jiangsu university(natural science edition),2017(1):30-36.
[14]张宪瑞,闫鹏,毕荣山.气液喷射器的不同液滴粒径分布特性研究[J].科学技术与工程,2012(16):3933-3936.ZHANG X R,YAN P,BI R S.Characteristic study of droplet size distribution in the gas-liquid two-phase ejector[J].Science technology and engineering,2012(16):3933-3936.
[15]沈胜强,曲晓萍,张博.气-液喷射器工作参数的数值模拟[J].太阳能学报,2006(1):106-110.SHEN S Q,QU X P,ZHANG B.Numerical simulation on process parameters in gas-liquid ejector[J].Acta energiae solaris sinica,2006(1):106-110.
[16]张峰,包家汉,梁海琴,等.特定条件下气-液喷射器结构合理性分析[J].机械研究与应用,2012(4):12-14.ZHANG F,BAO J H,LIANG H Q,et al.Rationality analysis on the structure of gas-liqulid ejector in a particular situation[J].Mechanical research&application,2012(4):12-14.