天然气水合物管道螺旋流动与传热数值模拟
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摘要
为了对输气管道中天然气水合物颗粒输送体系的螺旋悬浮流动规律做进一步研究,通过建立圆管螺旋流的三维模型,采用RNG k-ε湍流模型和DPM模型对天然气管道内的气固两相螺旋流动和传热进行三维瞬态的数值模拟,主要研究了天然气管道内不同横截面的速度场、温度场、水合物颗粒体积分数分布规律以及传热规律。数值模拟计算表明,螺旋流具有较强的颗粒携带能力,对增强水合物颗粒之间的传热、防治输气管道中水合物堵塞有较好的效果。该研究结果可为输气管道的安全输送提供理论指导。
In order to make further research on the spiral suspended flow law of natural gas hydrate particle transportation system in gas transportation pipelines,a three-dimensional round tube spiral flow model is established,and the RNG k-ε turbulent model and the DPM model are used to conduct the numerical simulation of three-dimensional transient on the gas-solid two-phase spiral flow and heat transfer in natural gas pipelines.The velocity field,temperature field,volume fraction distribution law and heat transfer law of distribution of hydrate particles of different cross sections in natural gas pipelines are mainly studied. Through numerical simulation calculation, it is shown that the spiral flow has stronger particle carrying capacity,which has good effects on enhancing the heat transfer between hydrate particles and the prevention and treatment of hydrate blockage in gas transportation pipelines and provides theoretical guidance on transportation safety of gas transportation pipelines.
In order to make further research on the spiral suspended flow law of natural gas hydrate particle transportation system in gas transportation pipelines,a three-dimensional round tube spiral flow model is established,and the RNG k-ε turbulent model and the DPM model are used to conduct the numerical simulation of three-dimensional transient on the gas-solid two-phase spiral flow and heat transfer in natural gas pipelines.The velocity field,temperature field,volume fraction distribution law and heat transfer law of distribution of hydrate particles of different cross sections in natural gas pipelines are mainly studied. Through numerical simulation calculation, it is shown that the spiral flow has stronger particle carrying capacity,which has good effects on enhancing the heat transfer between hydrate particles and the prevention and treatment of hydrate blockage in gas transportation pipelines and provides theoretical guidance on transportation safety of gas transportation pipelines.
引文
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[2]DURMUS A,ESEN M.Investigation of Heat Transfer and Pressure drop in Concentric Heat Exchanger with Snail Entrance[J].Applied Thermal Engineering,2002,22(3):321-332.
[3]BERGLES A E,JENSEN M K,SHOME B.The Literature on Enhancement of Convective Heat and Mass Transfer[J].Journal of Enhanced Heat Transfer,1996,4(1):1-6.
[4]宫崎薰.Solid Transportation In spiral Flow Pipe Line for Underground Digging system[D].日本:福井大学,2000.
[5]陈鹏,刘福旺,李玉星,等.水合物浆液流动特性数值模拟[J].油气储运,2014,33(2):160-164.
[6]饶永超,王树立,代文杰,等.天然气水合物浆体流变性与安全流动边界研究进展[J].化工进展,2015,34(10):3 551-3 556.
[7]刘雯,程小莉.管内螺旋导流板引发的气液两相旋流场[J].机械工程学报,2013,49(22):164-169.
[8]王树立,饶永超,张琳,等.水平管内螺旋流流动特性研究现状与进展[J].太原理工大学学报,2013,44(2):232-236.
[9]王树立,饶永超,韩永嘉,等.螺旋流发生装置的对比分析研究[J].流体机械,2013,41(2):30-38.
[10]WANG W,FAN S,LIANG D,et al.Experimental study on flow characteristics of tetrahydrofuran hydrate slurry in pipelines[J].Journal of Natural Gas Chemistry,2010,19(3):318-322.
[11]王武昌,陈鹏,李玉星,等.天然气水合物浆在管道中的流动沉积特性[J].天然气工业,2014,34(2):99-104.
[12]WONGCHAREE K,EIAMSA-ARD S.Friction and heat transfer characteristics of laminar swirl flow through the round tubes inserted with alternate clockwise and counterclockwise twisted-tapes[J].International Communications in Heat and Mass Transfer,2011,38(3):348-352.
[13]ZOHIR A E,ABDEL AZIZ A A,HABID M A.Heat transfer characteristics in a sudden expansion pipe equipped with swirl generators[J].International Journal of Heat and Fluid Flow,2011,32(1):352-361.
[14]张琳,钱红卫,宣益民,等.自转螺旋扭带管内三维流动与传热数值模拟[J].化工学报,2005,56(9):1 633-1 638.
[15]BHUIYA M M K,CHOWDHURY M S U,SHAHABUDDIN M,et al.Thermal characteristics in a heat exchanger tube fitted with triple twisted tape inserts[J].International Communication in Heat and Mass Transfer,2013,48(11):124-132.
[16]LIU Yang,LI Jiexun,WANG Zhihua,et al.The role of surface and subsurface integration in the development of a high-pressure and low-production gas field[J].Environmental Earth Sciences,2015,73(10):5 891-5 904.