Flame transfer functions of asymmetric conical and V-shaped flames

doi:10.1016/j.ast.2024.109439

IMECH-IR > 非线性力学国家重点实验室

	Flame transfer functions of asymmetric conical and V-shaped flames
	Qiao Z(乔正)1,2; Lv Y(吕钰)1,2
通讯作者	Lv, Yu([email protected])
发表期刊	AEROSPACE SCIENCE AND TECHNOLOGY
	2024-10-01
卷号	153 页码:9
ISSN	1270-9638
摘要	Transfer functions of asymmetric flames subjected to incident flow perturbations are explored using the classical kinematic model, the G-equation, parameterized by flame tip angle alpha, flame-base incline angle beta, and eccentricity e. With perturbations of various frequencies, we analyze perturbed asymmetric flames and derive analytical formulations of Flame Transfer Functions (FTF) for various flame conditions. It is observed that the gain of the asymmetric conical flame is increased compared to the symmetric case. Meanwhile, the amplification effect of the V-shaped flame is considerably suppressed as the flame becomes asymmetric. That means with a proper asymmetric geometry setting, the V-shaped flame no longer tends to amplify the perturbation and in other words becomes less susceptible to combustion instability. These findings have significant value for the future design and optimization of propulsion systems, where improving flame stability and reducing thermoacoustic instabilities are critical. Subsequently, a numerical study is conducted to verify the FTF results and examine the response of asymmetric flames under various perturbation levels. It has been demonstrated that the asymmetric conical flame is minimally affected by the amplitude of these perturbations, and the asymmetric V-shaped flame is highly sensitive to the convective amplitudes.
关键词	G-equation Transfer function Asymmetric V-shaped flame Asymmetric conical flame Combustion instabilities
DOI	10.1016/j.ast.2024.109439
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001290552900001
关键词[WOS]	LAMINAR PREMIXED FLAME ; KINEMATIC MODEL ; INSTABILITY ; PREDICTION
WOS研究方向	Engineering
WOS类目	Engineering, Aerospace
资助项目	NSFC Basic Science Center Program[11988102] ; Chinese Academy of Sciences[025GJHZ2022112FN] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620102]
项目资助者	NSFC Basic Science Center Program ; Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences
论文分区	一类
力学所作者排名	1
RpAuthor	Lv, Yu
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/96338
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
推荐引用方式 GB/T 7714	Qiao Z,Lv Y. Flame transfer functions of asymmetric conical and V-shaped flames[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2024,153:9.Rp_Au:Lv, Yu
APA	乔正,&吕钰.(2024).Flame transfer functions of asymmetric conical and V-shaped flames.AEROSPACE SCIENCE AND TECHNOLOGY,153,9.
MLA	乔正,et al."Flame transfer functions of asymmetric conical and V-shaped flames".AEROSPACE SCIENCE AND TECHNOLOGY 153(2024):9.