The effect of steady and pulsed air jet vortex generator blowing on a aerofoil section model undergoing sinusoidal pitching

Prince, S., Green, R. , Coton, F. and Wang, Y. (2019) The effect of steady and pulsed air jet vortex generator blowing on a aerofoil section model undergoing sinusoidal pitching. Journal of the American Helicopter Society, (doi:10.4050/JAHS.64.032004) (Early Online Publication)

Prince, S., Green, R. , Coton, F. and Wang, Y. (2019) The effect of steady and pulsed air jet vortex generator blowing on a aerofoil section model undergoing sinusoidal pitching. Journal of the American Helicopter Society, (doi:10.4050/JAHS.64.032004) (Early Online Publication)

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Abstract

Experimental results are reported on the assessment of steady and pulsed air jet vortex generators (AJVGs) for the suppression of dynamic stall on a sinusoidal pitching RAE9645 airfoil model. Tests at Rec of 1 million, at reduced pitching frequencies between 0.01 and 0.10 were performed with and without steady and pulsed AJVG blowing. The effect of jet momentum coefficient (0.0003 < Cμ < 0.0046), jet duty cycle (0.25 < DC < 1) and jet pulsing frequency (0.29 < F+ < 2.93) were investigated. Pulsed air jet blowing with F+ in the range 0.5–1.0 and with a duty cycle in the range 0.4–0.5, was found to be the most effective to achieve full suppression of dynamic stall vortex formation.

Item Type:Articles
Additional Information:This work was funded under the UK Defence Applied Research Partnership program, by the UK Defence Science & Technology Laboratory, QinetiQ Ltd., AgustaWestland Ltd., and the Technology Strategy Board.
Status:Early Online Publication
Refereed:Yes
Glasgow Author(s) Enlighten ID:Green, Dr Richard and Coton, Professor Frank and Prince, Dr Simon
Authors: Prince, S., Green, R., Coton, F., and Wang, Y.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Journal of the American Helicopter Society
Publisher:American Helicopter Society Inc.
ISSN:0002-8711
ISSN (Online):2161-6027
Published Online:30 July 2019
Copyright Holders:Copyright © 2019 AHS International
First Published:First published in Journal of the American Helicopter Society 2019
Publisher Policy:Reproduced with the permission of the Publisher

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