全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
化工学报  2015 

中心气流与环形气流作用下颗粒射流的流动与混合特性

DOI: 10.11949/j.issn.0438-1157.20150088, PP. 2411-2419

Keywords: 两相流,同轴射流,旋转射流,颗粒速度分布,混合,流动

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用PIV测速系统和高速摄像仪对同轴气固两相射流进行了实验研究,着重考察了同轴射流结构和旋流对颗粒流动与混合特性的影响。结果表明,环形气流作用下颗粒获得的轴向速度比相同条件下中心气流作用下的颗粒轴向速度大,且气固两相的混合效果更佳,在这两种同轴射流结构下,颗粒的轴向速度仅在靠近喷嘴的横截面上分布较为均匀。而旋流,特别是强旋的引入不仅可以促进远场区颗粒速度的均布,而且能够有效地改善两相混合效果。

References

[1]  Dong Zhiyong (董志勇). Mechanics of Jet (射流力学) [M]. Beijing: Science Press, 2005: 84-95.
[2]  Shuen J S, Solomon A S P, Zhang Q F, Faeth G M. Structure of particle-laden jets: measurements and predictions [J]. AIAA Journal, 1985, 23: 396-404.
[3]  Barlow R S, Morrison C Q. Two-phase velocity measurements in dense particle-laden jets [J]. Experiments in Fluids, 1990, 9(1/2): 93-104.
[4]  Sheen H J, Jou B H, Lee Y T. Effect of particle size on a two-phase turbulent jet [J]. Experimental Thermal and Fluid Science, 1994, 8: 315-327.
[5]  Aisa L, Garcia J A, Cerecedo L M, Garcia P I, Calvo E. Particle concentration and local mass flux measurements in two-phase flows with PDA. Application to a study on the dispersion of spherical particles in a turbulent air jet [J]. International Journal of Multiphase Flow, 2002, 28: 301-324.
[6]  Hadinoto K, Jones E N, Yurteri C, Curtis J S. Reynolds number dependence of gas-phase turbulence in gas-particle flows [J]. International Journal of Multiphase Flow, 2005, 31: 416-434.
[7]  Zhou H, Cen K F, Fan J R. Experimental investigation on flow structures and mixing mechanisms of a gas-solid burner jet [J]. Fuel, 2005, 84: 1622-1634.
[8]  Tamburello D A, Amitay M. Active manipulation of a particle-laden jet [J]. International Journal of Multiphase Flow, 2008, 34: 829-851.
[9]  Wicker R B, Eaton J K. Effect of injected longitudinal vorticity on particle dispersion in a swirling, coaxial jet [J]. Journal of Fluids Engineering, 1999, 121(4): 766-772.
[10]  Fan J R, Zhao H, Jin J. Two-phase velocity measurements in particle-laden coaxial jets [J]. Chemical Engineering Journal, 1996, 63(1): 11-17.
[11]  Mergheni M A, Sautet J C, Godard G, Ben Ticha H, Ben Nasrallah S. Experimental investigation of turbulence modulation in particle-laden coaxial jets by phase Doppler anemometry [J]. Experimental Thermal and Fluid Science, 2009, 33(3): 517-526.
[12]  Zhou Huahui(周华辉), Xu Jianliang(许建良), Li Weifeng(李伟锋), Liu Haifeng(刘海峰). Particle dispersion characteristics of dense gas-solids two-phase coaxial jets [J]. CIESC Journal(化工学报), 2009, 60(2): 332-337.
[13]  Liu H F, Cao W G, Xu J L, Li W F, Guo X L, Sun Z G. Characterization of the granular jet in a coaxial gas stream [J]. Powder Technology, 2012, 225: 206-213.
[14]  Liu H F, Cao W G, Xu J L, Li W F, Sun Z G. Dispersion mode of granular jet in a coaxial air jet [J]. Powder Technology, 2012, 217: 566-573.
[15]  Apte S V, Mahesh K, Moin P, Oefelein J C. Large-eddy simulation of swirling particle-laden flows in a coaxial-jet combustor [J]. International Journal of Multiphase Flow, 2003, 29(8): 1311-1331.
[16]  Liu Y, Zhou L X, Xu C X. Numerical simulation of instantaneous flow structure of swirling and non-swirling coaxial-jet particle-laden turbulence flows [J]. Physica A, 2010, 389(23): 5380-5389.
[17]  Lü Hui(吕慧), Li Weifeng(李伟锋), Xu Jianliang(许建良), Liu Haifeng(刘海峰). Characteristics of particle flow in dense gas-particle swirling jet with disturbance of air source [J]. CIESC Journal(化工学报), 2012, 63(2): 393-400.
[18]  Lu H, Liu H F, Li W F, Xu J L. Bubble formation in an annular granular jet dispersed by a central air round jet [J]. AIChE Journal, 2013, 59(6): 1882-1893.
[19]  Lu H, Liu H F, Li W F, Xu J L. Factors influencing the characterization of bubbles produced by coaxial gas-particle jet flow [J]. Fuel, 2013, 108: 723-730.
[20]  Lu H, Liu H F, Li W F, Xu J L, Cao G P. Bubbling feature of an annular granular jet dispersed by a central air jet with acoustic excitation [J]. Fuel, 2014, 123: 86-92.
[21]  Feng Y Q, Xu B H, Zhang S J, Yu A B, Zulli P. Discrete particle simulation of gas fluidization of particle mixtures [J]. AIChE Journal, 2004, 50(8): 1713-1728.
[22]  Fang M M, Luo K, Yang S L, Zhang K, Fan J R. Computational fluid dynamics-discrete element method investigation of solid mixing characteristics in an internally circulating fluidized bed [J]. Industrial & Engineering Chemistry Research, 2013, 52: 7556-7568.
[23]  Zhang Y, Zhong W Q, Jin B S, Xiao R. Mixing and segregation behavior in a spout-fluid bed: effect of the particle density [J]. Industrial & Engineering Chemistry Research, 2013, 52: 5489-5497.
[24]  Lacey P M C. Developments in the theory of particle mixing [J]. Journal of Applied Chemistry, 1954, 4(5): 257-268.
[25]  Campbell C S. Granular material flows—an overview [J]. Powder Technology, 2006, 162(3): 208-229.
[26]  Beer J M, Chigier N A. Combustion Aerodynamics (燃烧空气动力学) [M]. Chen Xi (陈熙), trans. Beijing: Science Press, 1979: 105-155.
[27]  Olof M, Anders R. PIV measurements of velocities and concentrations of wood fibres in pneumatic transport [J]. Experiments in Fluids, 2004, 37: 293-300.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133