Results 141 to 150 of about 1,736 (190)

Flap Vortex Management Using Active Gurney Flaps

AIAA Journal, 2009
An experimental study was conducted to assess the applicability of limited-span Gurney flaps for altering the flap-edge vortex characteristics of a swept constant-chord half-model with a commercial aircraft airfoil and high-lift system (slat and flap).
Greenblatt, D., Vey, S., Paschereit, C. O., Meyer, R.   +3 more
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Gurney flap aerodynamic unsteadiness

Sports Engineering, 1999
A Gurney flap is a thin strip of material attached at the trailing edge of the upper surface of a racing car wing in order to increase the downforce of a wing of limited size. The flow around a single element racing car wing with and without a 4.7% Gurney flap has been investigated experimentally and computationally.
null Sims-Williams, null White, null Dominy   +2 more
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Experimental Investigation of Gurney Flaps

Journal of Aircraft, 2008
The aerodynamics of a Gurney-flap-equipped airfoil has been explored by means of low-speed wind-tunnel experiments performed at a chord Reynolds number of 1:0 10. Various chordwise locations and sizes of Gurney flaps were tested. Surface-pressure distributions and the wake momentum deficit were measured and used to determine lift, pitching moment, and ...
Mark D. Maughmer, Götz Bramesfeld
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Aerofoil at low speeds with Gurney flaps

The Aeronautical Journal, 2003
This paper reviews the research on Gurney flaps and related high lift trailing edge devices. It investigates aerofoil performances at Reynolds numbers Re ≅ 105 and below, both with the clean configuration and various Gurney flap sizes. The device height is optimised, and a semi-empirical formula linking flap height to free stream speed and aerofoil ...
Brown, L, Filippone, A.
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Gurney Flaps in Transonic Flows

2003
The application of Gurney flaps to airfoils, high aspect ratio wings and delta wings in transonic flow is being investigated at the Institute of Aerodynamics and Flow Technology of DLR. The present paper gives an overview over these studies explaining the basic working principles and advantages of these trailing edge devices at transonic Mach numbers ...
Rosemann, Henning, Richter, Kai
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Effects of Gurney Flaps on a NACA0012 Airfoil

Flow, Turbulence and Combustion, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Li, Yachen, Wang, Jinjun, Zhang, Panfeng
openaire   +1 more source

Active Gurney Flap Unit

2017
This chapter presents an overview of existing Gurney flap actuation concepts for rotorcraft applications as well as suggests a new concept applicable to airfoils with little space in the vicinity of airfoil toe. Kinematic and dynamic analysis of the mechanism is performed for the required flap motion pattern.
Ihor Berezin, R. Raczynski
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Gurney Flap Force Calculations

2017
This chapter presents results obtained in a numerical investigation to determine the effect of the Gurney flap on a NACA 23012 airfoil. Two-dimensional models for the airfoil with different Gurney flap deployment and retraction position due to the motion imparted by the actuators are studied from the geometric data of the PZL Sokol W-3 main rotor ...
Prasanta Sarkar, Radoslaw Raczynski
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Preliminary Parametric Study of Gurney Flap Dependencies

Journal of Aircraft, 2006
Introduction T HE Gurney flap1,2 is typically a small plate, which is attached at or near the trailing edge of an airfoil on the pressure side. The flap has been shown to be a highly effective small-scale (typically 0.5–1.5% of the chord) modification that can achieve significant lift and pitching-moment generation.1,2 The Gurney functions by ...
Lance W. Traub, Adam C. Miller, Othon Rediniotis   +2 more
openaire   +1 more source

Gurney Flap Scaling for Optimum Lift-to-Drag Ratio

AIAA Journal, 1997
This note aims at providing evidence that there exists a flow-based scaling for the Gurney flap heights that yield an increase in lift-to-drag performance compared with the baseline airfoil at the same angle of attack (beneficial Gurney flaps). The results presented here, support this statement and further suggest that the boundary-layer thickness δ ...
Philippe Giguere, Guy Dumas, Jean Lemay
openaire   +1 more source