含气率对长圆管内气液两相流流场特性的影响
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摘要
为了解决不同工况下长圆管径向支撑承载力及其稳定性的问题,采用有限体积法,对长圆管内不同含气率的气液两相流的流场特性进行了数值计算。基于流体力学基本理论与多相流理论,完成了长圆管内气液两相流湍流流动形态的瞬态追踪,并计算了不同含气率的流场分布对管道内壁产生的流场作用力。结果表明:随着流动的进行,当气相流体加入液相流体时,气相流体作用于液相流体表面形成波浪,且含气率越大,气相流体对液相流体的作用越强,当含气率α>50%时,液相流体的流动效应被逐渐减弱,流动形态转变为层状流,管壁受到的流场作用力减小。
In order to solve the stability and supporting capacity of radial support on the long circular pipe under different conditions,using the finite volume method,the flow characteristics of gas-liquid two-phase flow in long circular pipe with different gas fraction was calculated.Based on the fluid mechanics theory and multiphase flow theory,transient tracking of gas-liquid two-phase turbulent flow in the long circular pipe was completed,and the flow force on the inner wall of the pipelines with different gas fraction was calculated.The results show that with the flow,when the gas phase fluid is added into the liquid,the gas phase act on the liquid fluid surface produce the wave,and the greater gas fraction,the stronger the effect,when the gas fraction is α>50%,the flow effect of liquid phase is weakened gradually,the flow pattern is changed into laminar flow,and the force acting on the wall is reduced.
In order to solve the stability and supporting capacity of radial support on the long circular pipe under different conditions,using the finite volume method,the flow characteristics of gas-liquid two-phase flow in long circular pipe with different gas fraction was calculated.Based on the fluid mechanics theory and multiphase flow theory,transient tracking of gas-liquid two-phase turbulent flow in the long circular pipe was completed,and the flow force on the inner wall of the pipelines with different gas fraction was calculated.The results show that with the flow,when the gas phase fluid is added into the liquid,the gas phase act on the liquid fluid surface produce the wave,and the greater gas fraction,the stronger the effect,when the gas fraction is α>50%,the flow effect of liquid phase is weakened gradually,the flow pattern is changed into laminar flow,and the force acting on the wall is reduced.
引文
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[13] 栾锋,阎昌琪,曹夏昕,等.摇摆对垂直上升管内气液两相流截面含气率影响的研究[J].核科学与工程,2006,26(3):215.LUAN Feng,YAN Changqi,CAO Xiaxin,et al.Research for Rolling Effects upon Void Fraction of Upward Gas-liquid Two Phase Flow in Vertical Tube[J].Chinese Journal of Nuclear Science and Engineering,2006,26(3):215.(in Chinese)
[14] 王红一,董峰.气液两相流中上升气泡体积的计算方法[J].仪器仪表学报,2009,30(11):2444.WANG Hongyi,DONG Feng.Calculation Method for Bubble Volume in Gas-liquid Two-phase Flow[J].Chinese Journal of Scientific Instrument,2009,30(11):2444.(in Chinese)
[15] 张东衡,唐志航,叶鸿明,等.一种气液两相流气相参数图像检测方法[J].计算机测量与控制,2006,14(5):597.ZHANG Dongheng,TANG Zhihang,YE Hongming,et al.Measurement Method of Gas-liquid Two-phase Flow Parameters Based on Digital Image Processing[J].Computer Measurement & Control,2006,14(5):597.(in Chinese)
[2] 王蒙,孙楠,王颖,等.曝气池中气液两相流速度场分布的实验研究与数值模拟[J].水利学报,2016,47(10):1322.WANG Meng,SUN Nan,WANG Ying,et al.Experimental Research and Numerical Simulation on Gas-Liquid Two-Phase Flow of Bubble Velocity Distribution in Aeration Tank[J].Journal of Hydraulic Engineering,2016,47(10):1322.(in Chinese)
[3] 卢金铃,席光,祁大同.气液两相流泵的研究进展[J].流体机械,2001,29(12):12.LU Jinling,XI Guang,QI Datong.Review of Research on Gas-Liquid Two-Phase-Flow Pumps[J].Fluid Machinery,2001,29(12):12.(in Chinese)
[4] 马虎根,涂文静,谢荣建,等.微尺度通道内气液两相流型可视化研究[J].中国电机工程学报,2011,31(29):85.MA Hugen,TU Wenjing,XIE Rongjian,et al.Visualization on Flow Pattern with Vapor-Liquid Two-Phase Flow in Microchannel[J].Proceedings of the CSEE,2011,31(29):85.(in Chinese)
[5] 张荣军,孙卫.垂直管流中的气液两相流压力计算[J].西北大学学报(自然科学版),2007,37(1):123.ZHANG Rongjun,SUN Wei.The Calculation on Flow Pressure of the Two-Phase[J].Journal of Northwest University(Natural Science Edition),2007,37(1):123.(in Chinese)
[6] 劳力云,张宏健,吴应湘,等.水平管道气液两相流中空隙率对动态压降信号的影响[J].化工学报,2000,51(4):547.LAO Liyun,ZHANG Hongjian,WU Yingxiang,et al.Influence of Void Fraction on Dynamic Characteristics of Pressure Drop Fluctuation in Horizontal Gas-Liquid Two-Phase Flow[J].Journal of Chemical Industry and Engineering,2000,51(4):547.(in Chinese)
[7] BALABEL A.Numerical Prediction of Droplet Dynamics in Turbulent Flow,Using the Level Set Method[J].International Journal of Computational Fluid Dynamics,2011,25(5):239.
[8] 方立德,张涛,徐英,等.利用U形管测量低压环雾状流与液束环状流体积含气率[J].化工学报,2008,59(5):1131.FANG Lide,ZHANG Tao,XU Ying,et al.Gas Volume Fraction Metering with U Tube in Low Pressure Annular-Mist and Wispy Annular Two-Phase Flow[J].Journal of Chemical Industry and Engineering,2008,59(5):1131.(in Chinese)
[9] 谢黎明,朱绪胜,姜伟.油气润滑系统中油气两相膜形成的数值模拟[J].新技术新工艺,2011(3):39.XIE Liming,ZHU Xusheng,JIANG Wei.Oil Gas Two Membrane Forming Process Value Simulation in Oil-gas Lubrication System[J].New Technology & New Process,2011(3):39.(in Chinese)
[10] 陈斌,傅宇晨,郭烈锦,等.水平管束间气液两相流局部含气率分布的实验研究[J].化工学报,2003,54(3):316.CHEN Bin,FU Yuchen,GUO Liejin,et al.Experimential Investigation of Distribution of Void Fraction Between Horizontal Tube Bundle[J].Journal of Chemical Industry and Engineering,2003,54(3):316.(in Chinese)
[11] 洪文鹏,滕飞宇,刘燕.管束间气液两相流动特性的研究进展[J].化工机械,2012,39(2):124.HONG Wenpeng,TENG Feiyu,LIU Yan.Progress in Researching Gas-Liquid Flow Characteristics of Tube Bundles[J].Chemical Engineering & Machinery,2012,39(2):124.(in Chinese)
[12] 孙波,孙立成,幸奠川,等.漂移流模型在大管内气液两相流动的适用性研究[J].实验流体力学,2013,27(3):56.SUN Bo,SUN Licheng,XING Dianchuan,et al.A Study of the Application of Drift-flux Model in Gas-liquid Two-phase Flow in a Large Tube[J].Journal of Experiments in Fluid Mechanics,2013,27(3):56.(in Chinese)
[13] 栾锋,阎昌琪,曹夏昕,等.摇摆对垂直上升管内气液两相流截面含气率影响的研究[J].核科学与工程,2006,26(3):215.LUAN Feng,YAN Changqi,CAO Xiaxin,et al.Research for Rolling Effects upon Void Fraction of Upward Gas-liquid Two Phase Flow in Vertical Tube[J].Chinese Journal of Nuclear Science and Engineering,2006,26(3):215.(in Chinese)
[14] 王红一,董峰.气液两相流中上升气泡体积的计算方法[J].仪器仪表学报,2009,30(11):2444.WANG Hongyi,DONG Feng.Calculation Method for Bubble Volume in Gas-liquid Two-phase Flow[J].Chinese Journal of Scientific Instrument,2009,30(11):2444.(in Chinese)
[15] 张东衡,唐志航,叶鸿明,等.一种气液两相流气相参数图像检测方法[J].计算机测量与控制,2006,14(5):597.ZHANG Dongheng,TANG Zhihang,YE Hongming,et al.Measurement Method of Gas-liquid Two-phase Flow Parameters Based on Digital Image Processing[J].Computer Measurement & Control,2006,14(5):597.(in Chinese)
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