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Aerodynamic Analysis of a Localized Flexible Airfoil at Low Reynolds Numbers

Published online by Cambridge University Press:  20 August 2015

Wei Kang ,
Jia-Zhong Zhang  and
Pei-Hua Feng
Wei Kang*
Affiliation:
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
Jia-Zhong Zhang*
Affiliation:
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
Pei-Hua Feng*
Affiliation:
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
*
Email:wkangxjtu@stu.xjtu.edu.cn
Corresponding author.Email:jzzhang@mail.xjtu.edu.cn
Email:f-peihua@stu.xjtu.edu.cn
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Abstract

A localized flexible airfoil at low Reynolds numbers is modeled and the aerodynamic performance is analyzed numerically. With characteristic based split scheme, a fluid solver for two dimensional incompressible Navier-Stokes equations is developed under the ALE framework, coupled with the theory of shallow arch, which is approximated by Galerkin method. Further, the interactions between the unsteady flow and the shallow arch are studied in detail. In particular, the effect of the self-excited vibration of the structure on aerodynamic performance of the airfoil is investigated deeply at various angles of attack. The results show that the lift-to-drag ratio has been increased greatly compared with the rigid airfoil. Finally, the relationship between the self-excited vibration and the evolution of the flow is analyzed using FFT tools.

Keywords

74F1076G2576D5576D05Fluid-structure interactionNavier-Stokes equationsaerodynamic performancelift enhancement and drag reductionflow control
Type
Research Article
Information
Communications in Computational Physics , Volume 11 , Issue 4 , April 2012 , pp. 1300 - 1310
Copyright
Copyright © Global Science Press Limited 2012

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