Experimental study of free stream turbulence effects on dynamic stall of pitching airfoil by using particle image velocimetry

T. S. Leu, J. M. Yu, C. C. Hu, J. J. Miau, S. Y. Liang, J. Y. Li, J. C. Cheng, S. J. Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

The unsteady flow fields above NACA 0015 airfoil pitching with/without upstream turbulence generator are investigated in a water tunnel by mean of particle image velocimetry (PIV). The turbulence was generated by a square bar mesh situated at the inlet of the test section. The airfoil pitching waveform is performed under the condition calculated from the angle of attack histogram of a vertical axis wind turbine (VAWT). By using PIV, the instantaneous vortex structures above the pitching airfoil can be revealed. It allows us to study the free stream turbulence effects on dynamic stall over an airfoil at pitching waveform the same as VAWT. It is found that the free stream turbulence intensity has significant impacts on the dynamic stall process. The dynamic stall process is delayed to higher incidence angles on increasing the turbulence intensity.

Original languageEnglish
Title of host publicationAEROTECH IV - Recent Advances in Aerospace Technologies
Pages103-108
Number of pages6
DOIs
Publication statusPublished - 2012 Dec 20
EventAEROTECH IV - 2012 - Kuala Lumpur, Malaysia
Duration: 2012 Nov 212012 Nov 22

Publication series

NameApplied Mechanics and Materials
Volume225
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

OtherAEROTECH IV - 2012
CountryMalaysia
CityKuala Lumpur
Period12-11-2112-11-22

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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