Loading [MathJax]/jax/output/HTML-CSS/config.js
Journals
Resources
About Us
Open Access

Unsteady Flow Separation and High Performance of Airfoil with Local Flexible Structure at Low Reynolds Number

Unsteady Flow Separation and High Performance of Airfoil with Local Flexible Structure at Low Reynolds Number

Year:    2014

Author:    Peng-Fei Lei, Jia-Zhong Zhang, Wei Kang, Sheng Ren, Le Wang

Communications in Computational Physics, Vol. 16 (2014), Iss. 3 : pp. 699–717

Abstract

The unsteady flow separation of airfoil with a local flexible structure (LFS) is studied numerically in Lagrangian frames in detail, in order to investigate the nature of its high aerodynamic performance. For such aeroelastic system, the characteristic-based split (CBS) scheme combined with arbitrary Lagrangian-Eulerian (ALE) framework is developed firstly for the numerical analysis of unsteady flow, and Galerkin method is used to approach the flexible structure. The local flexible skin of airfoil, which can lead to self-induced oscillations, is considered as unsteady perturbation to the flow. Then, the ensuing high aerodynamic performances and complex unsteady flow separation at low Reynolds number are studied by Lagrangian coherent structures (LCSs). The results show that the LFS has a significant influence on the unsteady flow separation, which is the key point for the lift enhancement. Specifically, the oscillations of the LFS can induce the generations of moving separation and vortex, which can enhance the kinetic energy transport from main flow to the boundary layer. The results could give a deep understanding of the dynamics in unsteady flow separation and flow control for the flow over airfoil.

You do not have full access to this article.

Already a Subscriber? Sign in as an individual or via your institution

Journal Article Details

Publisher Name:    Global Science Press

Language:    English

DOI:    https://doi.org/10.4208/cicp.111013.090514a

Communications in Computational Physics, Vol. 16 (2014), Iss. 3 : pp. 699–717

Published online:    2014-01

AMS Subject Headings:    Global Science Press

Copyright:    COPYRIGHT: © Global Science Press

Pages:    19

Keywords:   

Author Details

Peng-Fei Lei

Jia-Zhong Zhang

Wei Kang

Sheng Ren

Le Wang

  1. Adjoint-based optimal actuation for separated flow past an airfoil

    Thompson, Ernold | Goza, Andres

    Physics of Fluids, Vol. 37 (2025), Iss. 3

    https://doi.org/10.1063/5.0257571 [Citations: 0]
  2. Investigating chaotic wake dynamics past a flapping airfoil and the role of vortex interactions behind the chaotic transition

    Bose, Chandan | Sarkar, Sunetra

    Physics of Fluids, Vol. 30 (2018), Iss. 4

    https://doi.org/10.1063/1.5019442 [Citations: 68]
  3. Micro-vibration control of an aerostatic bearing with micro cylindrical array

    Cheng, Cheng | Chen, Jiahuan | Zhao, Ming | Liu, Zhengxian | Xu, Jialiang | Li, Guangyan | Hou, Yueting | Zhao, Weiling

    Physics of Fluids, Vol. 37 (2025), Iss. 1

    https://doi.org/10.1063/5.0250613 [Citations: 0]
  4. Experimental Investigation of Local Flexible Surface on Aerodynamic Effects for Finite Wing with NACA0018 Section

    Eroğlu, Ali Emirhan | Durhasan, Tahir | Jafari, Javad Rashid | Karasu, İlyas

    Çukurova Üniversitesi Mühendislik Fakültesi Dergisi, Vol. 40 (2025), Iss. 1 P.61

    https://doi.org/10.21605/cukurovaumfd.1665840 [Citations: 0]
  5. Using Lagrangian coherent structure to understand vortex dynamics in flow around plunging airfoil

    Chen, Jiahui | Zhang, Jiazhong | Cao, Shengli

    Journal of Fluids and Structures, Vol. 67 (2016), Iss. P.142

    https://doi.org/10.1016/j.jfluidstructs.2016.10.001 [Citations: 12]
  6. Effects of local oscillation of airfoil surface on lift enhancement at low Reynolds number

    Kang, Wei | Lei, Pengfei | Zhang, Jiazhong | Xu, Min

    Journal of Fluids and Structures, Vol. 57 (2015), Iss. P.49

    https://doi.org/10.1016/j.jfluidstructs.2015.05.009 [Citations: 28]
  7. Effect of dielectric barrier discharge plasma actuator on the dynamic moment behavior of pitching airfoil at low Reynolds number

    Huang, Guangjing | Dai, Yuting | Yang, Chao | Wu, You | Xia, Yingjie

    Physics of Fluids, Vol. 33 (2021), Iss. 4

    https://doi.org/10.1063/5.0048235 [Citations: 44]
  8. Mode competition in a plunging foil with an active flap: A multiscale modal analysis approach

    Wang, Tso-Kang | Shoele, Kourosh

    Physical Review Fluids, Vol. 7 (2022), Iss. 4

    https://doi.org/10.1103/PhysRevFluids.7.044701 [Citations: 4]
  9. A Lagrangian criterion of unsteady flow separation for two-dimensional periodic flows

    Han, Shuaibin | Zhang, Shuhai | Zhang, Hanxin

    Applied Mathematics and Mechanics, Vol. 39 (2018), Iss. 7 P.1007

    https://doi.org/10.1007/s10483-018-2350-8 [Citations: 6]
  10. Modal Phase Study on Lift Enhancement of a Locally Flexible Membrane Airfoil Using Dynamic Mode Decomposition

    Kang, Wei | Hu, Shilin | Chen, Bingzhou | Yao, Weigang

    Aerospace, Vol. 12 (2025), Iss. 4 P.313

    https://doi.org/10.3390/aerospace12040313 [Citations: 0]
  11. Surface morphing for aerodynamic flows at low and stalled angles of attack

    Thompson, Ernold | Goza, Andres

    Physical Review Fluids, Vol. 7 (2022), Iss. 2

    https://doi.org/10.1103/PhysRevFluids.7.024703 [Citations: 13]
  12. Local vibrations and lift performance of low Reynolds number airfoil

    Khan, TariqAmin | Li, Wei | Zhang, Jiazhong | Shih, Tom I-P.

    Propulsion and Power Research, Vol. 6 (2017), Iss. 2 P.79

    https://doi.org/10.1016/j.jppr.2017.05.001 [Citations: 6]
  13. Stall flutter mitigation of an airfoil by active surface morphing

    Xia, Yingjie | Dai, Yuting | Huang, Guangjing | Yang, Chao

    Physics of Fluids, Vol. 36 (2024), Iss. 8

    https://doi.org/10.1063/5.0222902 [Citations: 0]
  14. Lock-in mechanism of flow over a low-Reynolds-number airfoil with morphing surface

    Kang, Wei | Xu, Min | Yao, Weigang | Zhang, Jiazhong

    Aerospace Science and Technology, Vol. 97 (2020), Iss. P.105647

    https://doi.org/10.1016/j.ast.2019.105647 [Citations: 22]
  15. Complex Motions and Chaos in Nonlinear Systems

    Some Singularities in Fluid Dynamics and Their Bifurcation Analysis

    Zhang, Jiazhong | Liu, Yan

    2016

    https://doi.org/10.1007/978-3-319-28764-5_2 [Citations: 1]
  16. Complex Motions and Chaos in Nonlinear Systems

    Lock-In Behaviors of an Airfoil with Local Excitation in Low-Reynolds-Number Flow

    Kang, Wei | Dai, Xiangyan

    2016

    https://doi.org/10.1007/978-3-319-28764-5_4 [Citations: 0]