| Analysis of the Transonic Buffet Characteristics of Stationary and Pitching OAT15A Airfoil | |
Nie XY(聂雪媛)1,2 ; Zheng GN(郑冠男)1,2; Wei LY(韦莲旖)1,3; Huang CD(黄程德)1,2; Yang GW(杨国伟)1,2; Ji ZL(纪占玲)1,2
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| Corresponding Author | Nie, Xueyuan([email protected]) ; Zheng, Guannan([email protected]) |
| Source Publication | APPLIED SCIENCES-BASEL
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| 2024-08-01 | |
| Volume | 14Issue:16Pages:18 |
| Abstract | Transonic buffet flow is a classical complex and unstable flow that has a negative effect on aircraft fly safety. Therefore, it is crucial to study the unsteady characteristics of buffet flow. The numerical analysis method is very useful in achieving the aforementioned goal. In this paper, focused on the typical supercritical airfoil OAT15A in fixed and pitching conditions, unsteady Reynolds averaged Navier-Stokes (URANS) closed with the sst-k omega turbulence mode, coupled with the structure dynamical equation, is utilized to investigate the transonic buffet flow. Firstly, from the perspective of coherent flow structure, flow velocity divergence snapshots constructed from unsteady flow solutions are used to analyze the feature of transonic buffets in the two cases mentioned. Then, DMD modes are extracted by the dynamic mode decomposition technique from the velocity snapshots and adopted to analyze the flow modes of the two distinct flow fields. The numerical simulation results show that, in the fixed case, the regular motion feature of the buffet is present, the shock oscillation is closely related to the vortex structure, and the durations of rearward and forward movements of the shock are both equal to half of the buffet period. In the pitching case, the duration of the rearward motion of the primary shock is approximately five eighths of one buffet period, and the secondary shock appears with the primary one moving downstream, and they interact with each other. The region of the shock movement is larger than that of the fixed case, and there is chaotic flow rather than periodic flow in its wake. Structural elastic oscillation changes the characteristics of the aerodynamic response, which is solely affected by the frequency of the pitching oscillation. |
| Keyword | transonic buffet shock wave DMD modes airfoil |
| DOI | 10.3390/app14167149 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:001305011800001 |
| WOS Keyword | FREQUENCY LOCK-IN |
| WOS Research Area | Chemistry ; Engineering ; Materials Science ; Physics |
| WOS Subject | Chemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied |
| Funding Project | National Natural Science Foundation ; [12302230] |
| Funding Organization | National Natural Science Foundation |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Nie, Xueyuan ; Zheng, Guannan |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96497 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Nie XY,Zheng GN,Wei LY,et al. Analysis of the Transonic Buffet Characteristics of Stationary and Pitching OAT15A Airfoil[J]. APPLIED SCIENCES-BASEL,2024,14,16,:18.Rp_Au:Nie, Xueyuan, Zheng, Guannan |
| APA | 聂雪媛,郑冠男,韦莲旖,黄程德,杨国伟,&纪占玲.(2024).Analysis of the Transonic Buffet Characteristics of Stationary and Pitching OAT15A Airfoil.APPLIED SCIENCES-BASEL,14(16),18. |
| MLA | 聂雪媛,et al."Analysis of the Transonic Buffet Characteristics of Stationary and Pitching OAT15A Airfoil".APPLIED SCIENCES-BASEL 14.16(2024):18. |
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