气固两相圆射流场涡结构影响固粒扩散的研究

林建忠; 林江; 朱丽兵

气固两相圆射流场涡结构影响固粒扩散的研究

林建忠^{1, 2},
林江²,
朱丽兵¹

1.
浙江大学力学系流体传动及控制国家重点实验室, 杭州 310027;
2.
杭州应用工程技术学院, 杭州 310027

基金项目: 浙江省自然科学基金青年科技人才专项培养资金资助项目

详细信息

作者简介:
林建忠(1958~ ),男,教授,博导,院长,已发表专著3部,论文103篇,获科技论文专著奖21项.

中图分类号: O359
计量
- 文章访问数: 2651
- HTML全文浏览量: 155
- PDF下载量: 668
- 被引次数: 0
出版历程
- 收稿日期: 1998-04-03
- 修回日期: 1998-10-25
- 刊出日期: 1999-05-15

Research on the Particle Dispersion in the Particulate Two-Phase Round Jet

1.
Department of Mechanics, the State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, P R China;
2.
Hangzhou Institute of Applied Engineering, Hangzhou Institute of Applied Engineering, Hangzhou 310027, P R China

摘要

摘要: 用三维离散涡丝方法模拟轴对称圆射流场涡结构的发展.所得结果在某个周向位置上与用二维点涡方法计算的结果符合较好.然后采用单向耦合模型模拟固粒在圆射流中的运动,说明当固粒St数远小于1时,固粒受流场的作用较明显,当St数为1时,固粒主要分布在涡结构的周围,分布较均匀；当St数远大于1时,固粒受流场的影响较弱.当对涡环沿周向施以五个波长的扰动时,固粒扩散的范围较宽.固粒的扩散与扰动的振幅成正比.文中所得结论与一些实验结果相符,对实际应用有指导意义.
- 气固两相流 /
- 圆射流 /
- 大涡结构 /
- 固粒扩散
Abstract: In this paper,the three-dimensional vortex filament method was used to simulate the evolution of vortex structures in the axisymmetric round jet.The results agree well with the ones given by Chung and Troutt.Then one-coupling model was employed to calculate the particle motion based on the computed flows.The results show that the particle motion is affected by flows obviously at the case of particle number St 1 and negligibly at St 1,particles distribute around the vortex structures uniformly at St~1.When perturbations with wavenumber 5 are introduced to vortex rings, particles disperse wider along radial direction,which conforms to the experimental results.The degree of particle dispersion is in the direct ratio to the amplitude of perturbation.The conclusions given in the paper are useful to the practice usage.
- gas particle two-phase flow /
- round jet /
- large vortex stucture /
- particle dispersion

HTML全文

参考文献(8)

[1]	林建忠.湍流的拟序结构[M].北京:机械工业出版社,1995.
[2]	Ruetsch G R,Maxey M R.The evolution of small scale structure in homogeneous turbulence[J].Phys Fluids,1992,A4:2747.
[3]	Crowe C T,Gore R A,Troutt T R.Particle dispersion by coherent structures in free shear flows[J].Particle Science and Technology,1985,3:149.
[4]	Gore R A,et al.Particle dispersion by large scale vortex structures[J].Particle Science and Technology,1989,7:201.
[5]	Marcu B,Meiburg E.Three-dimensional features of particle dispersion in a nominally plane mixing layer[J].Phys Fluids,1996,8(9):2266.
[6]	Maxey M R,Riley J J.Equation of motion for a small rigid sphere in a uniform flow[J].Phys Fluids,1983,26(4):883.
[7]	Chung N,Troutt T R.Simulation of particle dispersion in axisymmetric jet[J].J Fluid Mech,1988,188:199.
[8]	Glauser M,Zheng X,Doering C R.The dynamics of organized structures in the axisymmetric jet mixing layer[A].In:O Metais,M Lesieur eds.Turbulence and Coherent Structure[C],Kluwer:springer-Verlag,1991.