多相流耦合水击模型在泄压阀压力精度设定中的应用
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摘要
氮气式水击泄压阀的压力精度设定问题与油气管道系统能否安全运行紧密相关,为进一步提高泄压阀的设定压力精度,构建了油气水三相流耦合水击模型和阀芯运动力学模型;根据泄压阀的工作原理,对泄压阀阀芯的受力情况进行分析,建立水击压强、氮气压力、弹簧力之间的数学联系;实现了油气水三相流耦合水击模型和运动力学模型的融合。研究结果表明:构建的数学模型能准确地计算出符合实际工况的水击压强、氮气压力、弹簧力的理论数值;水击压强、氮气压力与弹簧力大小呈周期性变化;氮气压力与弹簧力设定数值的确定,可进一步提高泄压阀的设定压力精度。
The problem of setting the pressure accuracy of the nitrogen type hydraulic pressure relief valve is closely related to the safe operation of the oil and gas pipeline system,so as to further improve the set pressure accuracy of the pressure relief valve. Firstly,a coupled water hammer model and a valve core movement mechanics model of oil-gas-water three-phase flow were constructed. Secondly,based on the working principle of pressure relief valve,the stress conditions of the pressure relief valve spool were analyzed,and the mathematical relationship between the water hammer pressure,nitrogen pressure and the spring force were established. Finally,the integration of the coupled water hammer model of the oil-gas-water threephase flow and the kinetic mechanics model is realized. The results show that the mathematical model constructed can accurately calculate the theoretical values of water hammer pressure,nitrogen pressure,and spring force that are in line with actual working conditions; the water hammer pressure,nitrogen pressure,and spring force are periodically changed; the determination of the set value of nitrogen pressure and spring force,solves the problem of pressure accuracy setting of pressure relief valve.
The problem of setting the pressure accuracy of the nitrogen type hydraulic pressure relief valve is closely related to the safe operation of the oil and gas pipeline system,so as to further improve the set pressure accuracy of the pressure relief valve. Firstly,a coupled water hammer model and a valve core movement mechanics model of oil-gas-water three-phase flow were constructed. Secondly,based on the working principle of pressure relief valve,the stress conditions of the pressure relief valve spool were analyzed,and the mathematical relationship between the water hammer pressure,nitrogen pressure and the spring force were established. Finally,the integration of the coupled water hammer model of the oil-gas-water threephase flow and the kinetic mechanics model is realized. The results show that the mathematical model constructed can accurately calculate the theoretical values of water hammer pressure,nitrogen pressure,and spring force that are in line with actual working conditions; the water hammer pressure,nitrogen pressure,and spring force are periodically changed; the determination of the set value of nitrogen pressure and spring force,solves the problem of pressure accuracy setting of pressure relief valve.
引文
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[14]吴维,刘嘉,胡纪滨,等.液压自由活塞发动机自激振动的控制[J].机械工程学报,2012,48(22):133-138.WU Wei,LIU Jia,HU Jibin,et al.Hydraulic free piston engine self-excited vibration control[J].Chinese Journal of Mechanical Engineering,2012,48(22):133-138.
[15]陈明,伍建林,王建华.气液固三相管流藕合水击振动特性的参数影响分析[J].工程力学,2015,32(2):233-240.CHEN Ming,WU Jianlin,WANG Jianhua.Analysis of parameters affecting the vibration characteristics of gas-liquid-solid ThreePhase turbulence flow[J].Engineering Mechanics,2015,32(2):233-240.
[16]李树勋,王伟波,范宜霖,等.基于浸人实体法的氮气式水击泄压阀动态仿真[J].工程热物理学报,2017,38(2):253-258.LI Shuxun,WANG Weibo,FAN Yilin,et al.Dynamic simulation of nitrogen-type water hammer pressure relief valve based on immersion solid method[J].Journal of Engineering Thermophysics,2017,38(2):253-258.
[2]ASLIK H,HARIRI A K,NAGHIYEV F B,et al.Physical and numerical modelling of fluid flow in pipeline[J].Journal of the Balkan Tribological Association.2010,16(1):20-34.
[3]王国荣,蒋金辰,陶思宇,等.脉动内流作用下L型弯管应力&振动特性实验研究[J].应用力学学报,2017,34(4):628-633.WANG Guorong,JIANG Jinchen,TAO Siyu,et al.Experimental study on the stress and vibration characteristics of L-shaped elbow under the action of pulsating inflow[J].Chinese Journal of Applied Mechanics,2017,34(4):628-633.
[4]李长俊,季楚凌,陈磊,等.气固两相流下球阀磨损特性研究[J].中国安全生产科学技术,2015,11(3):5-11.LI Changjun,JI Chuling,CHEN Lei,et al.Wear characteristics of ball valve under gas-solid two-phase flow[J].Journal of Safety Science and Technology,2015,11(3):5-11.
[5]GASSMANN S,PAGEL L.Magnetic actuated pressure relief valve[J].Sensors and Actuators A:Physical,2013,194(5):106-111.
[6]SONG X G,WANG L,PARK Y C.Transient analysis of a springloaded pressure safety valve using computational fluid dynamics CFD[J].Journal of Pressure Vessel Technology,2010,132(5):1-5.
[7]SONG X G,PARK Y C,PARK J H.Blowdown prediction of a conventional pressure relief valve with a simplified dynamic model[J].Mathematical and Computer Modelling,2013,57(1/2):279-288.
[8]周云龙,段晓宁,陈晓波,等.基于考虑含气量变化浆体水击模型的复合管道水击数值计算[J].水动力学研究与进展,2006,21(1):107-112.ZHOU Yunlong,DUAN Xiaoning,CHEN Xiaobo,et al.Numerical calculation of water hammer in composite pipeline based on water slug model considering changes of gas content[J].Hydrodynamics Research and Progress,2006,21(1):107-112.
[9]周云龙,黄娜.微重力环境下水平方管内气液两相流动特性的数值研究[J].中国电机工程学报,2014,34(26):4500-4507.ZHOU Yunlong,HUANG Na.Numerical study of gas-liquid twophase flow in horizontal square tubes under microgravity[J].Proceedings of the CSEE,2014,34(26):4500-4507.
[10]ALDEEB A A,DARBY R,ARNDT S.The dynamic response of pressure relief valves in vapor or gas service[J].Journal of Loss Prevention in the Process Indus-tries,2014,31(6):127-132.
[11]李树勋,胡建华,李连翠,等.先导式疏水阀阀芯组件动力特性分析[J].江苏大学学报(自然科学版),2013,34(6):643-649.LI Shuxun,HU Jianhua,LI Liancui,et al.Analysis on dynamic characteristics of pilot valve element of steam trap[J].Journal of Jiangsu University(Natural Science Edition),2013,34(6):643-649.
[12]李树勋,侯英哲,李连翠,等.液流旋启式止回阀关闭动态特性数值模拟[J].排灌机械工程学报,2013,31(4):335-339.LI Shuxun,HOU Yingzhe,LI Liancui,et al.Numerical simulation of dynamic characteristics of liquid-swirling check valve closing[J].Journal of Drainage and Irrigation Machinery Engineering,2013,31(4):335-339.
[13]李树勋,王虎斌,范宜霖,等.氮气式水击泄压阀初启阶段动态特性研究[J].华中科技大学学报(自然科学版),2016,44(7):10-13.LI Shuxun,WANG Hubin,FAN Yilin,et al.Study on the dynamic characteristics of the initial stage of nitrogen pressure relief valve[J].Journal of Huazhong University of Science and Technology(Nature Science),2016,44(7):10-13.
[14]吴维,刘嘉,胡纪滨,等.液压自由活塞发动机自激振动的控制[J].机械工程学报,2012,48(22):133-138.WU Wei,LIU Jia,HU Jibin,et al.Hydraulic free piston engine self-excited vibration control[J].Chinese Journal of Mechanical Engineering,2012,48(22):133-138.
[15]陈明,伍建林,王建华.气液固三相管流藕合水击振动特性的参数影响分析[J].工程力学,2015,32(2):233-240.CHEN Ming,WU Jianlin,WANG Jianhua.Analysis of parameters affecting the vibration characteristics of gas-liquid-solid ThreePhase turbulence flow[J].Engineering Mechanics,2015,32(2):233-240.
[16]李树勋,王伟波,范宜霖,等.基于浸人实体法的氮气式水击泄压阀动态仿真[J].工程热物理学报,2017,38(2):253-258.LI Shuxun,WANG Weibo,FAN Yilin,et al.Dynamic simulation of nitrogen-type water hammer pressure relief valve based on immersion solid method[J].Journal of Engineering Thermophysics,2017,38(2):253-258.