Effect of helical fins on the combustion performance in a micro-step combustor

doi:10.1016/j.fuel.2022.123718

	Effect of helical fins on the combustion performance in a micro-step combustor
	Zhang Z(张政)1 ; Shen WBY 3; Yao W(姚卫)1,2 ; Wang Q(汪球)1 ; Zhao W(赵伟)1,2
通讯作者	Yao, Wei([email protected])
发表期刊	FUEL
	2022-07-01
卷号	319 页码:13
ISSN	0016-2361
摘要	This study proposed a novel helical-fin-assisted micro-step Helix combustor to improve the performance of micro-combustors under high flow rates. The effects of the helical fins on the flow and combustion characteristics were analyzed with the aid of detailed hydrogen-air chemistry and a conjugated heat transfer mode. The performance of the proposed Helix combustor and the conventional micro-step combustor was compared. With the increase of the inlet velocity, two flame stabilization modes can be identified, i.e., the helical-fin-anchored flame and the traditional step-stabilized flame. The intensified heat transfer conjugation between the flame and helical fins enables the ignition and stabilization of the premixed flame before the inlet velocity reaches 34 m/s. The swirl flow induced by the helical fins reduces the length of the recirculation zones behind the step while augmenting the mixing between the hydrogen and the high-temperature products, which finally improves the combustion efficiencies. The helical-fin-anchored flame is preferred for thermo-electric/photovoltaic systems due to the uniform yet high wall temperature, as well as higher thermal efficiency. Meanwhile, the step-stabilized flame in the proposed combustor shows advantages of higher combustion efficiency and higher exhaust temperature for micro-engines under higher inlet velocities.
关键词	Micro-combustion Helical fin Combustion performance Conjugate heat transfer Mixing
DOI	10.1016/j.fuel.2022.123718
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000783215200005
关键词[WOS]	PREMIXED HYDROGEN/AIR FLAMES ; HOT SURFACE IGNITION ; THERMAL PERFORMANCE ; WALL TEMPERATURE ; NARROW CHANNELS ; HEAT-TRANSFER ; AIR ; METHANE/AIR ; STABILITY ; RECIRCULATION
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical
资助项目	National Key Research and Devel-opment Program of China[2019YFB1704200]
项目资助者	National Key Research and Devel-opment Program of China
论文分区	一类
力学所作者排名	1
RpAuthor	Yao, Wei
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/88890
专题	高温气体动力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Xiamen Univ, Sch Aerosp Engn, Xiamen 361102, Peoples R China
推荐引用方式 GB/T 7714	Zhang Z,Shen WBY,Yao W,et al. Effect of helical fins on the combustion performance in a micro-step combustor[J]. FUEL,2022,319:13.Rp_Au:Yao, Wei
APA	张政,Shen WBY,姚卫,汪球,&赵伟.(2022).Effect of helical fins on the combustion performance in a micro-step combustor.FUEL,319,13.
MLA	张政,et al."Effect of helical fins on the combustion performance in a micro-step combustor".FUEL 319(2022):13.

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