含水率对油水乳化液传输频率特性影响分析
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摘要
为了掌握油水乳化液中含水率对其动态特性的影响,建立含水率与乳化液传输的频率特性之间的非线性关系。首先,推导了油水乳化液在管体中压力波传播速度公式,分析了含水率对乳化液传输速度的影响规律;然后,利用分布参数理论以及传递矩阵法建立了油水乳化液的传输频率模型,表明在PVC透明钢丝软管中考虑流固耦合作用时含水率增加,其传播速度呈降低趋势;反之,钢管内乳化液的传输速度随着含水率的增加而呈递增趋势;含水率对系统的谐振频率影响也较为明显,乳化液中含水率越大,系统的同阶谐振频率越低,且随着含水率的增加,谐振频率的阶次越大,同阶次的谐振频率之间的差值也相应变大。实验验证所建模型是有效的,为有效检测油中含水率以及保障系统安全运行提供一定的理论基础。
In order to understand the influence of water content on the dynamic characteristics of oil-water emulsion,firstly the pressure wave velocity formula of the oilwater emulsion in the pipe is deduced in the body to establish the nonlinear relationship between water content and the frequency characteristics of e-mulsion transmission,and to analyze the law of effect of water content on the emulsion transmission speed.Then the parameters of distribution theory and transfer matrix method are used to develop the transmission frequency model of water in oil emulsions.The results show that oil-water emulsion propagation speed decreases with the increase of water content,considering fluid solid coupling effect of PVC transparent steel wire hose;on the contrary,with water content increasing,the transmission speed of emulsion is increasing trend in steel pipe.It′s obvious that the influence of water content on resonant frequency of the oil-water emulsion transmission system,is higher with water content rate in emulsion,and the same order of the resonant frequency of the system is lower.Further,with the resonant frequency of the order is greater under the increase of water content,the difference is corresponding bigger than the same order of the resonant frequency.The effectiveness of the model is validated by the experiments,to provide theoretical basis for water content detection in oil and guarantee the safe operation of the system.
In order to understand the influence of water content on the dynamic characteristics of oil-water emulsion,firstly the pressure wave velocity formula of the oilwater emulsion in the pipe is deduced in the body to establish the nonlinear relationship between water content and the frequency characteristics of e-mulsion transmission,and to analyze the law of effect of water content on the emulsion transmission speed.Then the parameters of distribution theory and transfer matrix method are used to develop the transmission frequency model of water in oil emulsions.The results show that oil-water emulsion propagation speed decreases with the increase of water content,considering fluid solid coupling effect of PVC transparent steel wire hose;on the contrary,with water content increasing,the transmission speed of emulsion is increasing trend in steel pipe.It′s obvious that the influence of water content on resonant frequency of the oil-water emulsion transmission system,is higher with water content rate in emulsion,and the same order of the resonant frequency of the system is lower.Further,with the resonant frequency of the order is greater under the increase of water content,the difference is corresponding bigger than the same order of the resonant frequency.The effectiveness of the model is validated by the experiments,to provide theoretical basis for water content detection in oil and guarantee the safe operation of the system.
引文
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[2]Kang J H,Lee K J,Nam J H,et al.Visualization of invasion percolation drainage process in porous media using density-matched immiscible fluids and refractive index matched solid structures[J].Journal of Power Sources,2010,195(9):2608-2612.
[3]Suga K Y,Matsumura A,Shitaka Y,et al.Effects of wall permeability on turbulence[J].International Journal of Heat and Fluid Flow,2010,31(6):974-984.
[4]吕宇玲,何利民,丁慎圆,等.原油-水分散流中液滴粒径及压降规律研究[J].工程热物理学报,2013,34(3):472-475.Lv Yuling,He Limin,Ding Shenyuan,et al.Investigation of droplet size and pressure drop in crude oil-water dispersed flows[J].Journal of Engineering Thermophysics,2013,34(3):472-475.(in Chinese)
[5]吕宇玲,何利民,程浩,等.油水两相分散流液滴粒径预测模型[J].化工学报,2012,63(7):2059-2063.LU Yuling,He Limin,Cheng Hao,et al.Oil and water two-phase flow droplet size dispersion prediction model[J].Journal of Chemical Industry and Engineering,2012,63(7):2059-2063.(in Chinese)
[6]徐广丽,张国忠,Brauner N,等.管道油流携水系统的界面分布[J].中国石油大学学报:自然科学版,2011,35(1):124-129.Xu Guangli,Zhang Guozhong,Brauner N,et al.Pipeline carrying oil flow water distribution system interface[J].Journal of China University of Petroleum:Natural Science Edition,2011,35(1):124-129.(in Chinese)
[7]Xu Weiwei,Wu Bo,Wu Turn,et al,Unsteady fluid and the U-shaped pipe coupling vibration characteristics[J].Journal of Chemical Engineering,2012,26(5):770-774.
[8]Sun Liqing,Li Zhongxing,Shen Xufeng,et al.Simulation and test study on dynamic characteristic of air spring with auxiliary chamber[J].Applied Mechanics&Materials,2013,341-342(341-342):391-394.
[9]Tang Xiaochun,Zhong Wei,Zhuang Dachang,et al.Study of optical fiber fluid flow monitoring system using pipe vibration frequency characteristic[J].Applied Mechanics and Materials,2013,295(2):2054-2057.
[10]廖健,何琳,祁晓野,等.一种变频率流量脉动吸收方法[J].舰船科学技术,2013,35(2):39-42.Liao Jian,He Lin,Qi Xiaoye,et al.A variable flow pulsation frequency absorption method[J].Ship Science and Technology,2013,35(2):39-42.(in Chinese)
[11]蒋祺,张方,姜金辉,等.动态载荷位置识别当量载荷误差判别法[J].振动、测试与诊断,2015,35(4):620-625.Jiang Qi,Zhang Fang,Jiang Jinhui,et al.Identification of equivalent load error for dynamic load position identification[J].Journal of Vibration,Measurement&Diagnosis,2015,35(4):620-625.(in Chinese)
[12]Liu Gongmin,Chen Hao,Li Shuaijun.Steam piping system parameters on the dynamic characteristics of research[J].Journal of Solid Mechanics,2012,33(2):168-175.
[13]贺尚红,王雪芝,何志勇,等.薄板振动式液压脉动衰减器滤波特性[J].机械工程学报,2013,49(4):148-153.He Shanghong,Wang Xuezhi,He Zhiyong,et al.Vibrating plate type hydraulic damper filtering characteristics[J].Journal of Mechanical Engineering,2013,49(4):148-153.(in Chinese)
[14]母东杰,李长春,延皓,等.基于特征线理论的阀控液压管路瞬变过渡流数值分析[J].兵工学报,2012,33(12):1455-1460.Mu Dongjie,Li Changchun,Yan Hao,et al.SUN meng feature-based line theory transitional flow valve hydraulic line transients numerical analysis[J].Acta Armamentarii,2012,33(12):1455-1460.(in Chinese)
[15]Chen Bin,Yi Menglin.A mathematics model investigation of ideal fluids in a pipeline of moving ending[J].Journal of Harbin Institute of Technology,2007,14(1):259-262.
[16]陈彬,刘阁,张贤明.基于动边界的阀控缸系统水击振动传输特性分析[J].机械科学与技术,2010,29(1):123-128.Chen Bin,Liu Ge,Zhang Xianming.Based on dynamic boundary valve cylinder system vibration transmission characteristics of water hammer[J].Mechanical Science and Technology for Aerospace Engineering,2010,29(1):123-128.(in Chinese)