压缩空气泡沫管路输送的模拟计算
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摘要
采用Fluent软件,选用Spalart-Allmaras模型模拟不同气液比下压缩空气A类泡沫在管路中的流动,对不同气液比下压缩空气泡沫的黏度和阻力损失进行研究。实验结果表明,采用Rabinowitsch-Mooney方程计算泡沫在较高流速下的剪切速率,再得出不同流量下泡沫的黏度,与模拟所得泡沫黏度吻合较好;数值模拟阻力损失与文献实验值的相对误差在10%以内;利用达西公式得到沿程阻力系数与广义雷诺数的关系,并得到了不同流量下泡沫运输管路出口处的压力。
Using Fluent software,the Spalart-Allmaras model was used to simulate the flow of compressed air A foam in the pipeline under different gas-liquid ratios,and the viscosity and resistance loss of the compressed air foam under different gas-liquid ratios were studied. The results showed that the shear rate of foam at high ?ow rate was calculated by Rabinowitsch-Mooney equation,and the viscosity of foam at different ?ow rates are in good agreement with that obtained by simulation. The relative error between the numerical simulation resistance loss and the experimental value in literature was less than 10%. The relation between the resistance coef?cient along the path and the generalized Re was obtained by using Darcy formula,and the pressure at the outlet of the foam transportation pipeline at different ?ow rates was obtained.
Using Fluent software,the Spalart-Allmaras model was used to simulate the flow of compressed air A foam in the pipeline under different gas-liquid ratios,and the viscosity and resistance loss of the compressed air foam under different gas-liquid ratios were studied. The results showed that the shear rate of foam at high ?ow rate was calculated by Rabinowitsch-Mooney equation,and the viscosity of foam at different ?ow rates are in good agreement with that obtained by simulation. The relative error between the numerical simulation resistance loss and the experimental value in literature was less than 10%. The relation between the resistance coef?cient along the path and the generalized Re was obtained by using Darcy formula,and the pressure at the outlet of the foam transportation pipeline at different ?ow rates was obtained.
引文
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[14]王新民,丁德强,吴亚斌,等.膏体充填管道输送数值模拟与分析[J].中国矿业,2006,15(7):57-59.
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[16]王勇凯,高红,宋波,等.压缩空气A类泡沫水平管路压降试验及数值模拟[J].化工学报,2018,69(10):4184-4193.
[2]初迎霞,王海明,乔启宇,等.压缩空气泡沫系统在林火扑救中的应用[J].林业机械与木工设备,2004,32(8):33-36.
[3]傅学成,叶宏烈,包志明,等.A类泡沫灭火剂的发展与瞻望[J].消防科学与技术,2008,27(8):590-592.
[4]傅学成,包志明,陈涛,等.压缩空气泡沫的隔热防护性能研究[J].消防科学与技术,2009,28(3):204-207.
[5]葛晓霞,高健,赵昊.压缩空气泡沫管内流动特性分析[J].消防科学与技术,2016,35(10):1408-1410.
[6]Sun Xiao,Liang Xiaobing,Wang Shuzhong,et al.Experimental study on the rheology of CO2 viscoelastic surfactant foam fracturing fluid[J].J Pet Sci Eng,2014,119(3):104-111.
[7]陈旸,陈涛,胡成,等.压缩空气泡沫传输阻力损失研究[J].消防科学与技术,2017,36(10):1418-1420.
[8]Hu Dongfang,Huang Zhengliang,Sun Jingyuan,et al.Numerical simulation of gas-liquid flow through a 90°duct bend with a gradual contraction pipe[J].J Zhejiang Univ Sci A,2017,18(3):212-224.
[9]Supa-Amornkul S,Steward F R,Lister D H.Modeling twophase flow in pipe bends[J].J Pressure Vessel Technol,2005,127(2):204-209.
[10]林全生,张猛,宋波,等.压缩空气A类泡沫在水平管道内流动研究[J].消防科学与技术,2017,36(9):1265-1268.
[11]张仂,谷芳.基于计算流体力学热流固耦合仿真的换热器折流板结构优化[J].石油化工,2012,41(6):682-687.
[12]Pravakar M,Khakhar D V.Hydraulic resistance of rigid polyurethane foams.I.Effect of different surfactants on foam structure and properties[J].J Appl Polym Sci,2004,93(6):2821-2829.
[13]甘德清,高锋,陈超,等.管道输送高浓度全尾砂充填料浆的阻力损失研究[J].矿业研究与开发,2016,36(1):94-98.
[14]王新民,丁德强,吴亚斌,等.膏体充填管道输送数值模拟与分析[J].中国矿业,2006,15(7):57-59.
[15]Rouhani S Z,Sohal M S.Two-phase flow patterns:A review of research results[J].Prog Nucl Energy,1983,11(3):219-259.
[16]王勇凯,高红,宋波,等.压缩空气A类泡沫水平管路压降试验及数值模拟[J].化工学报,2018,69(10):4184-4193.