竖直管道内冰浆流体流动特性的数值模拟
为研究竖直管道内冰浆流体流动特性,采用基于颗粒动力学理论的两相流双流体模型,通过CFD模拟研究了竖直管道内冰浆流体的等温流动过程。结果表明,在竖直管道内冰浆湍流输送过程中,流速沿管道中心轴线处近似呈对称分布。当冰浆流速较低时,管道截面处冰粒子的速度分布梯度较小,浓度分布趋于均匀,而随着冰浆流速升高,冰粒子的流场及浓度场均呈现出一定的梯级分布：管道近壁面处冰粒子浓度较低,而管道中心处冰粒子浓度较高,并在略偏于管道中心轴线位置处冰粒子浓度达到峰值。竖直管道内冰浆流体的流向变化对速度分布影响较弱,但对冰粒子浓度分布会产生一定影响,进而使得冰浆流体的管道压降在不同流向时存在着一定差异。...
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| Published in | 制冷学报 Vol. 33; no. 2; pp. 42 - 46 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
大连理工大学土木学院 大连116024%煤炭科学研究总院沈阳研究院煤矿安全技术国家重点实验室 沈阳110016
2012
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-4339 |
| DOI | 10.3969/j.issn.0253-4339.2012.02.042 |
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| Abstract | 为研究竖直管道内冰浆流体流动特性,采用基于颗粒动力学理论的两相流双流体模型,通过CFD模拟研究了竖直管道内冰浆流体的等温流动过程。结果表明,在竖直管道内冰浆湍流输送过程中,流速沿管道中心轴线处近似呈对称分布。当冰浆流速较低时,管道截面处冰粒子的速度分布梯度较小,浓度分布趋于均匀,而随着冰浆流速升高,冰粒子的流场及浓度场均呈现出一定的梯级分布：管道近壁面处冰粒子浓度较低,而管道中心处冰粒子浓度较高,并在略偏于管道中心轴线位置处冰粒子浓度达到峰值。竖直管道内冰浆流体的流向变化对速度分布影响较弱,但对冰粒子浓度分布会产生一定影响,进而使得冰浆流体的管道压降在不同流向时存在着一定差异。 |
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| AbstractList | TP391.9%TB61+1; 为研究竖直管道内冰浆流体流动特性,采用基于颗粒动力学理论的两相流双流体模型,通过CFD模拟研究了竖直管道内冰浆流体的等温流动过程.结果表明,在竖直管道内冰浆湍流输送过程中,流速沿管道中心轴线处近似呈对称分布.当冰浆流速较低时,管道截面处冰粒子的速度分布梯度较小,浓度分布趋于均匀,而随着冰浆流速升高,冰粒子的流场及浓度场均呈现出一定的梯级分布:管道近壁面处冰粒子浓度较低,而管道中心处冰粒子浓度较高,并在略偏于管道中心轴线位置处冰粒子浓度达到峰值.竖直管道内冰浆流体的流向变化对速度分布影响较弱,但对冰粒了浓度分布会产生一定影响,进而使得冰浆流体的管道压降在不同流向时存在着一定差异. 为研究竖直管道内冰浆流体流动特性,采用基于颗粒动力学理论的两相流双流体模型,通过CFD模拟研究了竖直管道内冰浆流体的等温流动过程。结果表明,在竖直管道内冰浆湍流输送过程中,流速沿管道中心轴线处近似呈对称分布。当冰浆流速较低时,管道截面处冰粒子的速度分布梯度较小,浓度分布趋于均匀,而随着冰浆流速升高,冰粒子的流场及浓度场均呈现出一定的梯级分布：管道近壁面处冰粒子浓度较低,而管道中心处冰粒子浓度较高,并在略偏于管道中心轴线位置处冰粒子浓度达到峰值。竖直管道内冰浆流体的流向变化对速度分布影响较弱,但对冰粒子浓度分布会产生一定影响,进而使得冰浆流体的管道压降在不同流向时存在着一定差异。 |
| Author | 王继红 张腾飞 王树刚 梁运涛 |
| AuthorAffiliation | 大连理工大学土木学院,大连116024 煤炭科学研究总院沈阳研究院煤矿安全技术国家重点实验室,沈阳110016 |
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| Author_FL | Liang Yuntao Wang Shugang Wang Jihong Zhang Tengfei |
| Author_FL_xml | – sequence: 1 fullname: Wang Jihong – sequence: 2 fullname: Zhang Tengfei – sequence: 3 fullname: Wang Shugang – sequence: 4 fullname: Liang Yuntao |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DocumentTitleAlternate | Numerical Simulation of Ice Slurry Flow in a Vertical Pipe |
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| EndPage | 46 |
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| Keywords | 工程热物理 双流体模型 流动特性 竖直管道 冰浆 数值模拟 |
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| Notes | The two fluids Eulerian model based on the kinetic theory of granular flow has been applied to predict the ice slurry flow in a vertical pipe without considering ice melting process.It can be seen that the ice particle velocity profile is symmetrical along the central axis in the vertical pipe.When ice slurry moves at low speed,the velocity gradient becomes small,and the concentration profile approaches even in the pipe cross section.When the moving speed increases,the ice particle velocity and concentration stratify.The ice particle concentration is relatively small near the pipe wall,but larger close to the central axis with a concentration peak nearby.The flow direction imposes minimal effects to velocity profiles but makes a great impact on particle concentration distribution.In addition,there are meaningful differences in pressure drop when flowing with different directions. 11-2182/TB Engineering thermophysics; Ice slurry; Flow characteristic; Numerical simulation; Vertical pipe; Two fluids model Wang Jiho |
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| Publisher | 大连理工大学土木学院 大连116024%煤炭科学研究总院沈阳研究院煤矿安全技术国家重点实验室 沈阳110016 |
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| Snippet | 为研究竖直管道内冰浆流体流动特性,采用基于颗粒动力学理论的两相流双流体模型,通过CFD模拟研究了竖直管道内冰浆流体的等温流动过程。结果表明,在竖直管道内冰浆湍流输送过... TP391.9%TB61+1; 为研究竖直管道内冰浆流体流动特性,采用基于颗粒动力学理论的两相流双流体模型,通过CFD模拟研究了竖直管道内冰浆流体的等温流动过程.结果表明,在竖直管道... |
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| SubjectTerms | 冰浆 双流体模型 工程热物理 数值模拟 流动特性 竖直管道 |
| Title | 竖直管道内冰浆流体流动特性的数值模拟 |
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