Turbulent drag reduction using riblets on a supercritical airfoil at transonic speeds

Viswanath, PR and Mukund, R (1995) Turbulent drag reduction using riblets on a supercritical airfoil at transonic speeds. AIAA Journal, 33 (5). pp. 945-947.

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Abstract

Numerous studies have shown that viscous drag reduction of 4-8% at low speeds can be achieved in simple two-dimensional flows at wind-tunnel Reynolds numbers. Because of the encouraging benefits realized at low speeds, an evaluation of riblet effectiveness at subsonic and transonic speeds, both in wind tunnels and flight, has been reported. Realistic applications involve, among other factors, pressure gradient (eg, airfoil and wing) and three-dimensionality. Drag reductions under these conditions are being assessed currently. This paper presents recent results of drag reduction using 3M riblets on a supercritical airfoil at transonic speeds covering an angle of attack range of -0.5 to 1 deg, which is relevant to cruise conditions. (Authors)

Item Type: Journal Article
Uncontrolled Keywords: Aerofoils; Drag Reduction; Transonic Flow;
Subjects: AERONAUTICS > Aircraft Stability and Control
Division/Department: Experimental Aerodynamics Division, Experimental Aerodynamics Division
Depositing User: Mr Vijaianand SK
Date Deposited: 10 Mar 2005
Last Modified: 24 May 2010 09:38
URI: http://nal-ir.nal.res.in/id/eprint/320

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