基于Fluent的气井放喷时气液两相流流场仿真研究
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摘要
在气井放喷时管道内会出现不确定比例的气液两相流,随着流动参数和物性参数的不同形成不同的流动状态,其中一些复杂的流态会对流体流量的测量带来很大的困难。采用Fluent仿真软件分析了放喷管内气液两相流流场的相关特性,得到了不同相比例条件下的管内压力、速度分布规律,以及气液两相分布规律。在现场工况条件下,根据仿真结果可以直观的了解管内两相流的流动情况,气液两相流没有发生明显的分层流动现象,基本上呈湍流状态。当含气量一定时,流体流速在不同流层分布不同,并在0～1 m/s的范围内变化,气体集中在水平管道上部,液体多集中在水平管道下部;当含气量越高时,对流体流速的影响不大,而气液两相流体混合程度更复杂。
The gas-liquid two-phase flow with uncertain proportions will occur in the gas well blow-out pipeline. With the different flow parameters and physical parameters, different flow states will be formed. Some complex flow patterns will bring great difficulties to the measurement of fluid flow. In this paper, Fluent simulation software is used to analyze the correlation characteristics of gas-liquid two-phase flow field in the nozzle. The pressure, velocity distribution and gas-liquid two-phase distribution in the nozzle under different ratio conditions are obtained. Under the field conditions, the simulation results can intuitively understand the flow of two-phase flow in the pipe. There is no obvious stratified flow in the gas-liquid two-phase flow, which is basically turbulent. When the gas content is constant, the distribution of fluid velocity varies in different flow layers and varies in the range of 0～1 m/s. Gas is concentrated in the upper part of the horizontal pipeline, while liquid is mostly concentrated in the lower part of the horizontal pipeline. When the gas content is higher, the influence on fluid velocity is small, while the mixing degree of gas-liquid two-phase fluid is more complex.
The gas-liquid two-phase flow with uncertain proportions will occur in the gas well blow-out pipeline. With the different flow parameters and physical parameters, different flow states will be formed. Some complex flow patterns will bring great difficulties to the measurement of fluid flow. In this paper, Fluent simulation software is used to analyze the correlation characteristics of gas-liquid two-phase flow field in the nozzle. The pressure, velocity distribution and gas-liquid two-phase distribution in the nozzle under different ratio conditions are obtained. Under the field conditions, the simulation results can intuitively understand the flow of two-phase flow in the pipe. There is no obvious stratified flow in the gas-liquid two-phase flow, which is basically turbulent. When the gas content is constant, the distribution of fluid velocity varies in different flow layers and varies in the range of 0～1 m/s. Gas is concentrated in the upper part of the horizontal pipeline, while liquid is mostly concentrated in the lower part of the horizontal pipeline. When the gas content is higher, the influence on fluid velocity is small, while the mixing degree of gas-liquid two-phase fluid is more complex.
引文
[1] 李琦瑰,郭贤贤,程浩,等. 基于Fluent的水平管油水两相分散流数值模拟[J]. 油气田地面工程,2013,32(9):68-69.
[2] 沈子木. 管道气液两相流研究[J]. 石化技术,2018,25(07):175.
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[11] 何青. 管内气液两相流相间作用力特性仿真研究[D].保定:河北大学,2014.
[12] 张剑. 水平管气液两相流钝体绕流机理研究[D]. 天津:天津大学,2013.
[13] 陈晨. 垂直上升管内气液两相流的三维仿真与实验研究[D]. 天津:天津大学,2009.
[14] 崔宇翔. 直管水道Fluent模拟使用方法[J]. 山东工业技术,2015(1):195-195.
[15] 罗冰. 基于超声波的气液两相流流动特性研究[D]. 杭州:中国计量学院,2015.
[16] 汤士忠. 两相流测量超声传感器的研究与设计[D]. 天津:天津大学,2011.
[2] 沈子木. 管道气液两相流研究[J]. 石化技术,2018,25(07):175.
[3] 张月皓,董峰,徐聪,等. 气液两相流含气率超声测试方法研究[J]. 仪器仪表学报,2014,35(9):2094-2101.
[4] 杨显锋. 管内气液两相流场和声场研究[D]. 哈尔滨:哈尔滨工程大学,2013.
[5] 牟海维,王爱林,刘超,等. 基于FLUENT的气液分离器内流场仿真研究[J]. 自动化与仪器仪表,2013(3):8-9.
[6] 庄状,江永军,张堃,等. Fluent在气液两相雾化喷嘴模拟分析中的应用[J]. 广东化工,2014(8):203-204.
[7] 赵铎. 水平管内气液两相流流型数值模拟与实验研究[D].北京:中国石油大学,2007.
[8] 袁一星,杨坤,刘海星,等. 基于Fluent的气水脉冲冲洗圆形弯管流场仿真[J].中国给水排水,2014,30(5):61-63.
[9] 罗志国,倪冰. 利用FLUENT模拟连铸结晶器内的气液两相流动[J].工业加热,2008,37(1):6-7.
[10] 李琦瑰,郭贤贤,程浩,等. 基于Fluent的水平管油水两相分散流数值模拟[J].油气田地面工程,2013,32(9):68-69.
[11] 何青. 管内气液两相流相间作用力特性仿真研究[D].保定:河北大学,2014.
[12] 张剑. 水平管气液两相流钝体绕流机理研究[D]. 天津:天津大学,2013.
[13] 陈晨. 垂直上升管内气液两相流的三维仿真与实验研究[D]. 天津:天津大学,2009.
[14] 崔宇翔. 直管水道Fluent模拟使用方法[J]. 山东工业技术,2015(1):195-195.
[15] 罗冰. 基于超声波的气液两相流流动特性研究[D]. 杭州:中国计量学院,2015.
[16] 汤士忠. 两相流测量超声传感器的研究与设计[D]. 天津:天津大学,2011.