| Citation: |
SHI D W, CHEN L T, FAN Z Y, et al. Experimental study on stall characteristics of wing sections with leading-edge protuberances inspired by humpback whale flipper[J]. Journal of Experiments in Fluid Mechanics, doi: 10.11729/syltlx20230165.
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In recent years, relevant studies have shown that wing sections with humpback whale-like leading-edge protuberances can effectively delay stall and improve aerodynamic performance after stall. To investigate the flow separation phenomenon of the biomimetic leading-edge protuberances wing section, a particle image velocimetry (PIV) experimental study on the NACA 634-021 wing section and modified wing sections with single and double leading-edge protuberances is carried out. The distributions of statistics such as the average velocity of the wing section suction surface and the turbulent kinetic energy at different angles of attack are compared. The proper orthogonal decomposition (POD) method is adopted to analyze the experimental data. The flow structures during the stall process are analyzed from an energy perspective. The study finds that: both single and double leading-edge protuberances wing sections have two-step stall characteristics. When a unilateral stall occurs, there is a stable attached flow at the convex peak, which suppresses the extension of the stall zone to the other side of the convex peak and plays a role similar to a wing blade. Compared to the single leading-edge protuberance wing section, the wing section with double leading-edge protuberances undergoes stall mode transition at smaller angles of attack. The energy of each mode of POD decomposition is related to the stall mode at which the wing section is located. The characteristics of the flow structure in the flow field change with the switching of stall modes. The flow separation mode of the single leading-edge protuberance wing section exhibits instability during the transition from unilateral stall to bilateral stall. This study provides an experimental reference for the theoretical research and potential engineering application of biomimetic leading-edge protuberances wing sections.
| [1] |
REIDENBERG J S, LAITMAN J T. Blowing bubbles: an aquatic adaptation that risks protection of the respiratory tract in humpback whales (Megaptera novaeangliae)[J]. The Anatomical Record, 2007, 290(6): 569–580. doi: 10.1002/ar.20537
|
| [2] |
HAIN J, CARTER G, KRAUS S, et al. Feeding behavior of the humpback whale, Megaptera novaeangliae, in the western North Atlantic[J]. Fishery Bulletin, 1981, 80: 259–268.
|
| [3] |
FISH F E, BATTLE J M. Hydrodynamic design of the humpback whale flipper[J]. Journal of Morphology, 1995, 225(1): 51–60. doi: 10.1002/jmor.1052250105
|
| [4] |
FISH F E, WEBER P W, MURRAY M M, et al. The tubercles on humpback whales' flippers: application of bio-inspired technology[J]. Integrative and Comparative Biology, 2011, 51(1): 203–213. doi: 10.1093/icb/icr016
|
| [5] |
MIKLOSOVIC D S, MURRAY M M, HOWLE L E, et al. Leading-edge tubercles delay stall on humpback whale (Megaptera novaeangliae) flippers[J]. Physics of Fluids, 2004, 16(5): L39–L42. doi: 10.1063/1.1688341
|
| [6] |
PEDRO H C, KOBAYASHI M. Numerical study of stall delay on humpback whale flippers[C]//Proc of the 46th AIAA Aerospace Sciences Meeting and Exhibit. 2008. doi: 10.2514/6.2008-584
|
| [7] |
WEBER P W, HOWLE L E, MURRAY M M, et al. Computational evaluation of the performance of lifting surfaces with leading-edge protuberances[J]. Journal of Aircraft, 2011, 48(2): 591–600. doi: 10.2514/1.C031163
|
| [8] |
JOHARI H, HENOCH C, CUSTODIO D, et al. Effects of leading-edge protuberances on airfoil performance[J]. AIAA Journal, 2007, 45(11): 2634–2642. doi: 10.2514/1.28497
|
| [9] |
ZHANG M M, WANG G F, XU J Z. Aerodynamic control of Low-Reynolds-Number airfoil with leading-edge protuberances[J]. AIAA Journal, 2013, 51(8): 1960–1971. doi: 10.2514/1.J052319
|
| [10] |
CAI C, LIU S H, ZUO Z G, et al. Experimental and theoretical investigations on the effect of a single leading-edge protuberance on airfoil performance[J]. Physics of Fluids, 2019, 31(2): 027103. doi: 10.1063/1.5082840
|
| [11] |
CAI C, ZUO Z G, MAEDA T, et al. Periodic and aperiodic flow patterns around an airfoil with leading-edge protuberances[J]. Physics of Fluids, 2017, 29(11): 115110. doi: 10.1063/1.4991596
|
| [12] |
李德友, 常洪, 左志钢, 等. 仿座头鲸前缘凸起数对NACA 634-021翼型失速控制机理影响研究[J]. 大电机技术, 2020(4): 1–9. DOI: 10.3969/j.issn.1000-3983.2020.04.001
LI D Y, CHANG H, ZUO Z G, et al. The effect of humpback whalelike leading-edge protuberances number on stall control mechanism of NACA634-021 airfoil[J]. Large Electric Machine and Hydraulic Turbine, 2020(4): 1–9. doi: 10.3969/j.issn.1000-3983.2020.04.001
|
| [13] |
ZHAO M, ZHAO Y J, LIU Z X, et al. Proper orthogonal decomposition analysis of flow characteristics of an airfoil with leading edge protuberances[J]. AIAA Journal, 2019, 57(7): 2710–2721. doi: 10.2514/1.J058010
|
| [14] |
YANG P X, ZHU Y C, WANG J J. Effect of leading-edge tubercles on the flow over low-aspect-ratio wings at low Reynolds number[J]. Theoretical and Applied Mechanics Letters, 2023, 13(1): 100386. doi: 10.1016/j.taml.2022.100386
|
| [15] |
GHAZI M A, GHASSEMI H, GHAFARI H R. Hydrodynamic performance and the power production of the tidal turbine by new profiles at the leading-edge tubercles[J]. Ships and Offshore Structures, 2023, 18(6): 875–885. doi: 10.1080/17445302.2022.2078532
|
| [16] |
DONG J Z, CHU W L, ZHANG H G, et al. Flow control mechanism of compressor cascade: a new leading-edge tubercles profiling method based on sine and attenuation function[J]. Physics of Fluids, 2023, 35(6): 066118. doi: 10.1063/5.0151476
|
| [17] |
李润泽, 王琦, 徐宁, 等. 凹凸前缘压气机叶栅旋涡结构探索[J]. 热能动力工程, 2021, 36(9): 69–78. DOI: 10.16146/j.cnki.rndlgc.2021.09.009
LI R Z, WANG Q, XU N, et al. Exploration on the vortex structure of concave-convex leading edge compressor cascade[J]. Journal of Engineering for Thermal Energy and Power, 2021, 36(9): 69–78. doi: 10.16146/j.cnki.rndlgc.2021.09.009
|
| [18] |
陈柳, 曹琳琳, 赵国寿, 等. 仿生前缘流动与空化控制机理的数值研究[J]. 工程热物理学报, 2019, 40(10): 2291–2298. DOI: CNKI:SUN:GCRB.0.2019-10-014
CHEN L, CAO L L, ZHAO G S, et al. Numerical study on the mechanism of flow and cavitation control by leading-edge tubercles on hydrofoil[J]. Journal of Engineering Thermophysics, 2019, 40(10): 2291–2298. doi: CNKI:SUN:GCRB.0.2019-10-014
|
| [19] |
杨伟琦. 仿座头鲸胸鳍翼段空化流动控制机理研究[D]. 哈尔滨: 哈尔滨工业大学, 2021.
YANG W Q. Study on the control mechanism of cavitation flow in the pectoral fin segment of humpback whale[D]. Harbin: Harbin Institute of Technology, 2021. doi: 10.27061/d.cnki.ghgdu.2021.002838
|
| [20] |
侯宇飞, 李志平. 仿生正弦前缘对翼面动态失速的影响[J]. 航空学报, 2020, 41(1): 123276. DOI: 10.7527/S1000-6893.2019.23276
HOU Y F, LI Z P. Effect of bionic sinusoidal leading-edge on dynamic stall of airfoil[J]. Acta Aeronautica et Astronautica Sinica, 2020, 41(1): 123276. doi: 10.7527/S1000-6893.2019.23276
|
| [21] |
蔡畅. 仿座头鲸鳍肢前缘凸起对翼型失速特性控制机理研究[D]. 北京: 清华大学, 2018.
CAI C. Effect of leading-edge protuberances inspired by humpback whale flipper on airfoil stall control[D]. Beijing: Tsinghua University, 2018. doi: 10.27266/d.cnki.gqhau.2018.000320
|
| [22] |
LUMLEY J L. The structure of inhomogeneous turbulence[J]. Atmospheric Turbulence and Radio Wave Propagation, 1967: 166–178. doi: 10.1007/BF00271656
|
| [23] |
BERKOOZ G, HOLMES P, LUMLEY J L. The proper orthogonal decomposition in the analysis of turbulent flows[J]. Annual Review of Fluid Mechanics, 1993, 25: 539–575. doi: 10.1146/annurev.fl.25.010193.002543
|
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