两相流中柱状固粒对流体湍动特性影响的研究

林建忠; 林江; 石兴

两相流中柱状固粒对流体湍动特性影响的研究

林建忠¹,
林江^1,2,
石兴¹

1.
浙江大学力学系, 杭州 310027;
2.
杭州应用工程技术学院, 杭州 310012

基金项目: 国家杰出青年科学基金资助项目(19925210)

详细信息

作者简介:
林建忠(1958- ),男,福建建阳人,教授,博士,博导.

中图分类号: O359
计量
- 文章访问数: 2095
- HTML全文浏览量: 88
- PDF下载量: 634
- 被引次数: 0
出版历程
- 收稿日期: 2001-07-30
- 修回日期: 2001-11-28
- 刊出日期: 2002-05-15

Research on the Effect of Cylinder Particles on the Turbulent Properties in Particulate Flows

1.
Department of Mechanics, Zhejiang University, Hangzhou 310027, P R China;
2.
Hangzhou Institute of Applied Engineering, Hangzhou 310012, P R China

摘要

摘要: 对含柱状固粒的两相流场,建立了包含柱状固粒对流场影响的流体脉动速度方程,在求解脉动速度方程的基础上,经平均得到流体的湍流强度和雷诺应力.将该方法用于槽流湍流场的求解,并与单相流实验结果进行了比较.计算中变化柱状固粒的参数,给出了固粒的体积分数、长径比、松驰时间对流场湍动特性的影响,说明粒子对流场的湍动特性起着抑制作用,其抑制的程度与粒子的体积分数、长径比成正比,与粒子的松弛时间成反比.
- 两相流 /
- 柱状固粒 /
- 槽流 /
- 湍动特性
Abstract: The fluid fluctuating velocity equations which include the term of cylinder particles were established.The turbulent intensity and Reynolds stress of fluid were obtained by averaging fluctuating velocity based on the solution of the fluctuating velocity equations.Above approach was used to solve the channel turbulent flows,and computational results were compared with the experimental ones for the case of single phase flow.The effects of volume fraction of particles,the ratio of particle length to diameter and the particle relaxation time on turbulent properties were illustrated by changing cylinder particle parameters.It is shown that particles play a restraining role to turbulent properties in the flows.The degree of restraint is directly proportional to the volume fraction of particle,the ratio of particle length to diameter and inversely proportional to particle relaxation time.
- two-phase flow /
- cylinder particle /
- channel flow /
- turbulent property

HTML全文

参考文献(5)

[1]	Gore R A,Crowe C.Effect of particle size on modulating turbulent intensity[J].Intl J Multiphase Flow,1989,15:279-291.
[2]	LIN Jian-zhong,SHI Xing.Study on fibre suspended two-phase flow by two-way coupling model[A].In:Michaelides E E Ed.Inter of Confer Multiphase Flow 2001[C].May 27-June 1,USA New Oreans:Tulane University Press,No.708,2001.
[3]	CHOU Pei-yuan.Similarity structure of vorticity fluctuation and the theory of turbulence[J].Scientia Sinica,1958,8(10):1059-1119.
[4]	林建忠,黄永念.湍流准相性理论及其在矩形渠道流场中的应用[J].水利学报,1994,(12):72-77.
[5]	Clark J A.A study of incompressible turbulent boundary layers in channel flows[J].Trans ASME J Basic Engng,1968,90(8):455-462.