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Technical Brief

Effect of trailing-edge flap deflection on a symmetric airfoil over a wavy ground

[+] Author and Article Information
Vincent Tremblay-Dionne

Department of Mechanical Engineering, McGill University, Montreal, Quebec, Canada H3A 2K6
vincent.tremblay.dionne@gmail.com

Timothy Lee

Department of Mechanical Engineering, McGill University, Montreal, Quebec, Canada H3A 2K6
Tim.Lee@McGill.ca

1Corresponding author.

ASME doi:10.1115/1.4041736 History: Received July 28, 2018; Revised October 08, 2018

Abstract

The effect of trailing-edge flap deflection on the aerodynamic properties and flowfield of a symmetric airfoil over a wavy ground is investigated experimentally. This Technical Brief is a continuation of Ref [14] in which an unflapped airfoil was employed. Regardless of flap deflection, the cyclic variation in the sectional lift Cl and pitching moment Cm coefficients over the wavy ground always persists. The Cm also has an opposite trend to Cl. The flap deflection, however, produces an increased maximum and minimum Cl and Cm with a reduced fluctuation compared to their unflapped counterparts. The Cd increase outperforms the Cl increase, leading to a lowered Cl/Cd of the flapped airfoil.

Copyright (c) 2018 by ASME
Topics: Deflection , Airfoils
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