IMECH-IR  > 高温气体动力学国家重点实验室
Hypergolic ignition by head-on collision of N,N,N',N'-tetramethylethylenediamine and white fuming nitric acid droplets
Zhang DW; Zhang P; Yuan YM(袁越明); Zhang TC(张泰昌); Zhang, P (reprint author), Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.
Source PublicationCOMBUSTION AND FLAME
2016-11-01
Volume173Pages:276-287
ISSN0010-2180
Abstract

Hypergolic ignition by the head-on collision of a smaller N,N,N',N' tetramethylethylenediamine (TMEDA) droplet and a larger white fuming nitric acid (WFNA) droplet was experimentally investigated by using a droplet collision experimental apparatus equipped with a time-resolved shadowgraph, a photodetector and an infrared detector. The investigation was focused on understanding the influence of droplet collision and mixing, which vary with the collisional Weber number (We = 20-220) and the droplet size ratio (Delta = 1.2-2.9) while have a fixed Ohnesorge number (Oh = 2.5x10(-3)), on the hypergolic ignitability and the ignition delay times. The hypergolic ignition was found to critically rely on the heat release from of the liquid-phase reaction of TMEDA and nitric acid, which is subsequent to and enhanced by the effective mixing of the droplets of proper size ratios. Consequently, the ignitability regime nomogram in the We-A space shows that the hypergolic ignition favors small Delta s and large Wes; the ignition delay times tend to decrease with either decreasing Delta, or increasing We, or both. A non-monotonic variation of the ignition delay times with We was observed and attributed to the non-monotonic emergence of jet-like mixing patterns that enhance the droplet mixing and hence the liquid-phase reaction. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

KeywordHypergolic Ignition White Fuming Nitric Acid n Droplet Collision n Jet-like Mixing N' N'-tetramethylethylenediamine
DOI10.1016/j.combustflame.2016.08.010
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000385909500026
WOS KeywordCOALESCENCE ; MONOMETHYLHYDRAZINE ; DYNAMICS ; N,N,N',N'-TETRAMETHYLETHYLENEDIAMINE ; SEPARATION ; VISCOSITY ; BEHAVIOR ; DROPS
WOS Research AreaThermodynamics ; Energy & Fuels ; Engineering
WOS SubjectThermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical ; Engineering, Mechanical
Funding OrganizationHong Kong RGC/GRF(PolyU 152217/14E) ; Central Research Grants of the Hong Kong Polytechnic University(G-UA2M ; G-YBGA)
DepartmentLHD超声速燃烧
Classification一类
RankingFalse
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59702
Collection高温气体动力学国家重点实验室
Corresponding AuthorZhang, P (reprint author), Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China.
Recommended Citation
GB/T 7714
Zhang DW,Zhang P,Yuan YM,et al. Hypergolic ignition by head-on collision of N,N,N',N'-tetramethylethylenediamine and white fuming nitric acid droplets[J]. COMBUSTION AND FLAME,2016,173:276-287.
APA Zhang DW,Zhang P,Yuan YM,Zhang TC,&Zhang, P .(2016).Hypergolic ignition by head-on collision of N,N,N',N'-tetramethylethylenediamine and white fuming nitric acid droplets.COMBUSTION AND FLAME,173,276-287.
MLA Zhang DW,et al."Hypergolic ignition by head-on collision of N,N,N',N'-tetramethylethylenediamine and white fuming nitric acid droplets".COMBUSTION AND FLAME 173(2016):276-287.
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