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Computational realization of multiple flame stabilization modes in DLR strut-injection hydrogen supersonic combustor
Wu K(吴坤); Zhang P(张鹏); Yao W(姚卫); Fan XJ(范学军)
Source PublicationPROCEEDINGS OF THE COMBUSTION INSTITUTE
2019-02-01
Volume37Issue:3Pages:3685-3692
ISSN1540-7489
AbstractInspired by the existence of multiple flame stabilization modes in cavity-assisted supersonic combustor, multiple flame stabilization modes of DLR hydrogen-fueled strut injection supersonic combustor were numerically realized and analyzed for a wide ranges of inflow stagnation temperature from 607 to 2141 K and overall equivalence ratio from 0.022 to 0.110. Finite-rate chemistry large eddy simulation with detailed hydrogen mechanism was employed to capture unsteady flow characteristics and the effects of chemical kinetics. Two typical flame stabilization modes were identified and presented in a regime nomogram, which shows the dominant influence of the stagnation temperature and the secondary influence of overall equivalence ratio. At relatively low stagnation temperatures, the flame is stabilized in an "attached flame" mode, which requires a low-speed recirculation zone behind the strut for radical production and a high-speed intense combustion zone for heat release. At relatively high stagnation temperatures, the flame is stabilized in a "lifted flame" mode, in which the effect of the low-speed recirculation zone is negligible, rendering most reactions take place in supersonic flow. At intermediate stagnation temperatures, blow-out was always observed and flame cannot be stabilized in the combustor even with initially forced ignition. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
KeywordSupersonic combustion Flame stabilization mode DLR Strut injection scheme Stagnation Temperature Overall equivalence ratio
DOI10.1016/j.proci.2018.07.097
Indexed BySCI ; EI
Language英语
WOS IDWOS:000456628600119
WOS KeywordLARGE-EDDY SIMULATION ; AIR
WOS Research AreaThermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical
WOS SubjectThermodynamics ; Energy & Fuels ; Engineering
Funding OrganizationTraining Program of the Major Research Plan of the National Natural Science Foundation of China [91641110] ; National Natural Science Foundation of China [11502270] ; RGC/GRF [PolyU 152217/14E, PolyU 152651/16E] ; NSFC [91641105]
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78202
Collection高温气体动力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
2.Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wu K,Zhang P,Yao W,et al. Computational realization of multiple flame stabilization modes in DLR strut-injection hydrogen supersonic combustor[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2019,37(3):3685-3692.
APA 吴坤,张鹏,姚卫,&范学军.(2019).Computational realization of multiple flame stabilization modes in DLR strut-injection hydrogen supersonic combustor.PROCEEDINGS OF THE COMBUSTION INSTITUTE,37(3),3685-3692.
MLA 吴坤,et al."Computational realization of multiple flame stabilization modes in DLR strut-injection hydrogen supersonic combustor".PROCEEDINGS OF THE COMBUSTION INSTITUTE 37.3(2019):3685-3692.
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