含高浓度悬浮固粒运动射流稳定性研究

林建忠; 周泽宣

含高浓度悬浮固粒运动射流稳定性研究

林建忠^1,2,
周泽宣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310012

基金项目: 教育部跨世纪优秀人才培养计划基金资助项目

详细信息

作者简介:
林建忠(1958- ),男,福建建阳人,教授,博导,院长,已出版专著4部,发表论文130篇,获奖22项.

中图分类号: O359
计量
- 文章访问数: 2287
- HTML全文浏览量: 173
- PDF下载量: 481
- 被引次数: 0
出版历程
- 收稿日期: 2000-03-14
- 修回日期: 2000-08-21
- 刊出日期: 2000-12-15

Research on Stability of Moving Jet Containing Dense Suspended Solid Particles

LIN Jian-zhong^1,2,
ZHOU Ze-xuan¹

1.
Department of Mechanics, State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310017, P R China;
2.
Hangzhou Institute of Applied Engineering, Hangzhou 310017, P R China

摘要

摘要: 首先用连续介质耦合模型推导出含高浓度悬浮固粒运动射流的空间稳定性方程,然后借助渐进分析法和欧拉守恒差分格式,用有限差分数值解法得到不同流向位置、流场雷诺数、固粒属性和喷射装置运动速度时流场的稳定性特征曲线,说明喷射装置的反向运动使不稳定扰动频率范围扩大,正向运动则相反。固粒抑制流场的不稳定性,随着固粒等效斯托克斯数的减小,这种效应增强。这些结论,对于两相运动射流发展的认识有重要意义。
- 悬浮固粒 /
- 连续介质耦合模型 /
- 稳定性 /
- 运动射流 /
- 数值计算
Abstract: The spatial stability equation of moving jet containing dense suspended solid particles was derived out by means of the continuum phase-coupled model.The stability curves of moving jet for different downstream distances,Reynolds number of flow-field,particle properties and velocities of jetting device are got by the finite difference method based on the asymptotic method and the Eulerian conservative difference scheme.Founded on the analyses of the obtained stability curves it is found that the positive velocity of jetting device widens the unstable frequency range of flow-field but the effect of the negative one is contrary.In addition,particles existing in the flow-field curb the instability of flow-field and the effect enhances with the decrease of Reynolds number of flow-field.These conclusions benefit learning the development of moving two-phase jet.
- suspended solid particles /
- continuum phase-coupled model /
- stability /
- moving jet /
- numerical computation

HTML全文

参考文献(11)

[1]	Chung J N, Troutt T R. Simulation of particle dispersion in an axisymmetric jet[J]. J Fluid Mech,1998,186:199-222.
[2]	Logmire E K, Eaton J K. Structure of a particle-laden round jet[J]. J Fluid Mech,1992,236:217-257.
[3]	Logmire E K, Eaton J K. Active open-loop control of particle dispe rsion in round jets[J]. J AIAA,1994,32:555-563.
[4]	Peterson R A, Samet M M. On the preferred mode of jet instability [J]. J Fluid Mech,1988,194:153-173.
[5]	Yang Y, Chung J N, Troutt T R, et al. The influence of particles on the spatial stability of two-phase mixing layers[J]. Physics of Fluids A,1990,2:1839-1845.
[6]	Sykes D, Lyell M J. The effect of particle loading on the spatial stability of a circular jet[J]. Physics of Fluids A,1994,6:1937-1939.
[7]	Ramkumar N P. Stability of particle-laden round jets to small dist urbances[J]. J ASME,1995,228:427-433.
[8]	Alfons M, Gunter H. On the instability of a circular jet with external flow[J]. J Fluid Mech,1982,114:343-359.
[9]	LIN Jian-zhong, ZHOU Ze-xuan. Effect of suspended solid particles on stability of interface of moving jet[J]. Journal of Hydrodynamics,1999, 11(4):60-66.
[10]	Morris P J. The spatial viscous instability of axisymmetric jets [J]. J Fluid Mech,1976,77:511-529.
[11]	KONG Kang, QIN Meng-zhao. Hamilton algorithm of Hamilton dynamic system[J]. Progress in Natural Science,1991,2:102-112