0
Technical Brief

Flow over the Tip Region of a Flexible Cantilever Wing with the Effect of Angle of Attack

[+] Author and Article Information
Ye Hu

Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
mehy@ust.hk

Xiaohui Liu

Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
xliuat@connect.ust.hk

Wei Shyy

ASME Fellow, Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
weishyy@ust.hk

Huihe Qiu

ASME Member, Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
meqiu@ust.hk

1Corresponding author.

ASME doi:10.1115/1.4042667 History: Received June 28, 2018; Revised January 24, 2019

Abstract

The investigation focused on the conversions of flow structures with a change in angle of attack (AOA) for a flexible cantilever wing, which experienced a self-excited vibration. Stereoscopic particle imaging velocimetry (Stereo-PIV) was utilized to measure the velocity field in the wing-tip region as AOA varied from 0° to 12°. At the Reynolds number (Re) of 3×104, instability waves shedding from the wing were amplified as they propagated and developed into Karman Vortex Street in the far downstream region at low AOAs (AOA=4° & 6°). As AOA increased to 8° with the wing model was still steady, the Karman Vortex Street no longer existed. The wing started to vibrate at AOA=10° owing to the self-excited vibration, and the Karman Vortex Street appeared again. The inception location of the Karman Vortex Street moved further upstream than in the cases at AOA=4° & 6°. A new vortex structure, secondary vortex-pairs, appear outside the main wing-tip vortex (WTV).

Copyright (c) 2019 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In