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Optimization of tungsten particles spheroidization with different size in thermal plasma reactor based on numerical simulation
He, Jiaping1,2; Bai, Liuyang1; Jin, Hucheng1,2; Yuan, Fangli1
2016-11-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume302Issue:NOVPages:288-297
Abstract

Micro-size tungsten particles have been prepared by radio-frequency (RF) thermal plasma reactor. SEM images show that spheroidization ratio of small particles is obviously lower than that of big particles. Numerical model has been founded to simulate the spheroidization system to explain this phenomenon based on FLEUNT software. The calculation results indicate that small particles are easy to diffuse and 'back-mix', which will urge small particles to escape from the high temperature area, while big particles are flowing straightly through the high temperature area, as a result that small particles cannot absorb enough heat and cannot be spheroidized well. The forces of diffusion and 'back-mixing' are each radial velocity and axial velocity. With some calculations based on the change of each gas flow, it can be found that appropriate combinations of gas flow can improve the spheroidization ratio of small particles. (C) 2016 Elsevier B.V. All rights reserved.

KeywordTungsten Particles Spheroidization Numerical Simulation Thermal Plasma
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2016.08.067
Indexed BySCI
Language英语
WOS KeywordHEAT-TRANSFER ; CFD ; PROGRESS ; POWDER ; ARMOR
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11535003)
WOS IDWOS:000386420500029
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21583
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
He, Jiaping,Bai, Liuyang,Jin, Hucheng,et al. Optimization of tungsten particles spheroidization with different size in thermal plasma reactor based on numerical simulation[J]. POWDER TECHNOLOGY,2016,302(NOV):288-297.
APA He, Jiaping,Bai, Liuyang,Jin, Hucheng,&Yuan, Fangli.(2016).Optimization of tungsten particles spheroidization with different size in thermal plasma reactor based on numerical simulation.POWDER TECHNOLOGY,302(NOV),288-297.
MLA He, Jiaping,et al."Optimization of tungsten particles spheroidization with different size in thermal plasma reactor based on numerical simulation".POWDER TECHNOLOGY 302.NOV(2016):288-297.
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