Results 171 to 180 of about 2,745 (210)

Effects of Gurney Flaps on a NACA0012 Airfoil

Flow, Turbulence and Combustion, 2002
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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
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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
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Experimental Study on Gurney Flap and Apex Flap on Delta Wing

Journal of Aircraft, 2004
The effects of Gurney flaps and apex flaps on the longitudinal aerodynamic performance of a delta wing with 70-deg sweepback angle were investigated in low-speed wind tunnel at a Reynolds number of 3.16 × × 10 5 based on the root chord of the delta wing.
Jing-Xia Zhan, Jin-Jun Wang
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Rotor Computations with Active Gurney Flaps

2016
This paper builds on the Helicopter Multi-Block CFD solver of the University of Liverpool and demonstrates the implementation and use of Gurney flaps on wings, and rotors. The idea is to flag any cell face within the computational mesh with a solid, no slip boundary condition.
M. A. Woodgate, V. A. Pastrikakis, G. N. Barakos   +2 more
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CFD Method for Modelling Gurney Flaps

2017
A CFD method for dealing with Gurney flaps is presented in this chapter. The flap is implemented as a thin solid surface without the need to generate a detailed CFD mesh around it. The method is compared with results for fully resolved Gurney flaps and is also demonstrated for complete rotor configurations. The advantage of the method is its efficiency
Vasileios Pastrikakis, Mark Woodgate, George Barakos   +2 more
openaire   +1 more source

Wake Vortex Control Using Static Segmented Gurney Flaps

AIAA Journal, 2007
A study to assess the potential for using static segmented Gurney flaps, also known as miniature trailing edge effectors, for active wake vortex alleviation is conducted using a half-span model wing with NACA 0012 shape and an aspect ratio of 4.1. All tests are performed with the wing at an 8.9 deg angle of attack and chord-based Reynolds number around
Claude G. Matalanis, John K. Eaton
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Drag Reduction on Gurney Flaps and Divergent Trailing Edges

2001
Miniflaps at the trailing edges of airfoils (e.g., Gurney flaps or divergent trailing edges) change the Kutta condition and thus produce higher lift. Unfortunately, however, the drag is also increased due to the flow separation downstream of this particular type of trailing edge.
Meyer, R., Bechert, D. W., Hage, W.
openaire   +3 more sources