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Investigation into clustering of syntheticjet actuators for flow separation controlapplications

Published online by Cambridge University Press:  03 February 2016

S. C. Liddle  and
N. J. Wood
S. C. Liddle
Affiliation:
School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
N. J. Wood
Affiliation:
School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
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Abstract

An investigation into the behaviour of clusteredsynthetic jet Actuators for flow-controlapplications is described. Experiments have beenundertaken with two small-scale synthetic jetactuators in a zero-pressure gradientboundary-layer, in order to investigate the effectof configuration yaw angle and relative input signalphase. Oil-flow visualisation and hotwire anemometrytechniques were used, demonstrating that changes inthe downstream flow structure could be observed.Compared to a streamwise configuration, in which asymmetrical counter-rotating vortex pair wasproduced by the synthetic jet-boundary-layerinteraction, a broader asymmetric interaction wasproduced in a 15° yaw configuration. Streamwisevelocity contour plots, illustrating the developmentof the interaction downstream, over four phaseangles, were presented. Significant differences inthe PSD analyses of downstream streamwise velocitytime histories were found, suggesting that inputsignal phase could influence the stability and henceeffectiveness of flow structures used inflow-control applications.

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 109 , Issue 1091 , January 2005 , pp. 35 - 44
Copyright
Copyright © Royal Aeronautical Society 2005 

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