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Control of trailing-edge separation by tangential blowing inside the bubble

Published online by Cambridge University Press:  03 February 2016

P. R. Viswanath  and
K. T. Madhavan
P. R. Viswanath
Affiliation:
Experimental Aerodynamics Division, National Aerospace Laboratories, Bangalore, India
K. T. Madhavan
Affiliation:
Experimental Aerodynamics Division, National Aerospace Laboratories, Bangalore, India
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Abstract

Experiments have been performed investigating the effectiveness of steady tangential blowing, with the blowing slot located downstream of separation (but inside the separation bubble) to control a trailing-edge separated flow at low speeds. Trailing-edge separation was induced on a two-dimensional aerofoil-like body and the shear layer closure occurred in the near-wake. Measurements made consisted of model surface pressures and mean velocity, turbulent shear stress and kinetic energy profiles in the separated zone using a two-component LDV system. It is explicitly demonstrated that the novel concept of tangential blowing inside the bubble can be an effective means of control for trailing-edge separated flows as well. Blowing mass and momentum requirements for the suppression of wall and wake flow reversals have been estimated.

Type
Research Article
Information
The Aeronautical Journal , Volume 108 , Issue 1086 , August 2004 , pp. 419 - 425
Copyright
Copyright © Royal Aeronautical Society 2004 

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