Please use this identifier to cite or link to this item:
Title: Active control of vortex-airfoil interaction
Authors: Zhang, MM
Zhou, Y
Cheng, L 
Issue Date: 2004
Source: 15th Australian Fluid Mechanics Conference, The University of Sydney, Sydney, 13-17 Dec, 2004 (CD-ROM) How to cite?
Abstract: It is well known that interactions between the leading edge of a blade and incoming vortical structures produce a sharp rise in pressure, contributing significantly to the noise production in fans, turbine machines, etc. Active control of interactions between an airfoil and incoming cylinder-generated vortices has been presently investigated. The essence of the control is to create a local perturbation, using piezo-ceramic actuators, on the surface near the leading edge of the airfoil, thus modifying the airfoil-vortex interactions. Both open- and closed-loop controls are used, where the surface perturbation was controlled by an external sinusoidal wave and a feedback pressure signal from a pressure transducer installed at the leading edge, respectively. Experiments were carried out in a wind tunnel. It was observed that the closed-loop control was superior to the open-loop one; the closed- and open-loop controls achieve a maximum reduction in the pressure fluctuation at the dominant vortex frequency by 73% and 44%, respectively.
Appears in Collections:Conference Paper

Show full item record

Page view(s)

Last Week
Last month
Checked on Aug 20, 2017

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.