| Flame transfer functions of asymmetric conical and V-shaped flames | |
| Qiao Z(乔正)1,2; Lv Y(吕钰)1,2 | |
| Corresponding Author | Lv, Yu([email protected]) |
| Source Publication | AEROSPACE SCIENCE AND TECHNOLOGY
 |
| 2024-10-01 | |
| Volume | 153Pages:9 |
| ISSN | 1270-9638 |
| Abstract | 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. |
| Keyword | G-equation Transfer function Asymmetric V-shaped flame Asymmetric conical flame Combustion instabilities |
| DOI | 10.1016/j.ast.2024.109439 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001290552900001 |
| WOS Keyword | LAMINAR PREMIXED FLAME ; KINEMATIC MODEL ; INSTABILITY ; PREDICTION |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Aerospace |
| Funding Project | NSFC Basic Science Center Program[11988102] ; Chinese Academy of Sciences[025GJHZ2022112FN] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620102] |
| Funding Organization | NSFC Basic Science Center Program ; Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Lv, Yu |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96338 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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. |
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