[1]陈良勇,段钰锋,刘猛,等.水平管入口段内水煤浆流动特性数值模拟[J].东南大学学报(自然科学版),2010,40(2):402-408.[doi:10.3969/j.issn.1001-0505.2010.02.036]
 Chen Liangyong,Duan Yufeng,Liu Meng,et al.Numerical study of developing coal-water slurry flow in entrance region of horizontal pipe[J].Journal of Southeast University (Natural Science Edition),2010,40(2):402-408.[doi:10.3969/j.issn.1001-0505.2010.02.036]
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水平管入口段内水煤浆流动特性数值模拟()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第2期
页码:
402-408
栏目:
数学、物理学、力学
出版日期:
2010-03-20

文章信息/Info

Title:
Numerical study of developing coal-water slurry flow in entrance region of horizontal pipe
作者:
陈良勇12 段钰锋1 刘猛1 蒲文灏1 赵长遂1
1 东南大学能源与环境学院,南京 210096; 2 南京工业大学能源学院,南京 210009
Author(s):
Chen Liangyong12 Duan Yufeng1 Liu Meng1 Pu Wenhao1 Zhao Changsui1
1 School of Energy and Environment, Southeast University, Nanjing 210096, China
2 College of Energy, Nanjing University of Technology, Nanjing 210009, China
关键词:
水煤浆 入口段 多相流模型 颗粒动理学
Keywords:
coal water slurry entrance region multi-fluid model kinetic theory of granular flow
分类号:
O373
DOI:
10.3969/j.issn.1001-0505.2010.02.036
摘要:
以Eulerian多相流方法为基础建立了水煤浆流动的液固两相流体动力学模型,并对水平管入口段内水煤浆流动进行了模拟.模型采用颗粒动理学理论求解固相本构方程,采用RNG k-ε湍流混合模型描述颗粒间具有强烈作用的两相湍流流动.针对水煤浆中煤粉颗粒的双峰分布特性,将煤粉看作2种大小不同的固相,同时考虑固相与液相、固相与固相之间的动量交换.模型有效性通过Kaushal等试验结果和水煤浆的压降试验验证.通过模拟考察了入口段内速度及浓度分布过程和入口段长度的变化规律.结果表明:重力和颗粒间的相互作用对浓度和速度分布过程具有重要影响; 固相体积分数在30%~49.5%范围内,入口段长度随浓度的增加而减小,随平均流速(0.2~5.0 m/s)先增加后减小.
Abstract:
An Eulerian multi-fluid flow model is developed to carry out a numerical study on coal-water slurry flow in the entrance region of horizontal pipe. The kinetic theory of granular flow is used to calculate constitutive equations of the solid-phase components and the RNG k-ε turbulent model is incorporated into the governing equation to model turbulent two phase flow with strong particle-particle interactions. In this model, the coal particles with bimodal distribution are considered as two solid-phase components and the moment exchange between solid and liquid phase as well as that between solid and solid phase are taken into account. The model was validated with Kaushal experimental data from available literature and the pressure gradient data by author’s experiments. The numerical investigations focus mainly on the developing processes of volume fraction and velocity distributions in the entrance region as well as the entry length. The results show that the gravitational force and the strong particle-particle interaction have significant effects on concentration and velocity distribution profile. The entry length decreases as solid concentration increases from 30% to 49.5% and for the same slurry, the entry length firstly increases and then decreases when the inlet velocity increases from 0.2 to 5.0 m/s.

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备注/Memo

备注/Memo:
作者简介: 陈良勇(1977—),男,博士生; 段钰锋(联系人),男,博士,教授,博士生导师, yfduan@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2010CB227001).
引文格式: 陈良勇,段钰锋,刘猛,等.水平管入口段内水煤浆流动特性数值模拟[J].东南大学学报:自然科学版,2010,40(2):402-408. [doi:10.3969/j.issn.1001-0505.2010.02.036]
更新日期/Last Update: 2010-03-20