Results 151 to 160 of about 1,736 (190)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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

Performance Analysis of NACA4412 Airfoil with Gurney Flap

2020
Gurney flap has been used to increase lift in varied types of wings used in aerial vehicles. It is also preferred as it increases pressure on the pressure side of the airfoil thus increasing the lift. Gurney flaps delay the onset of boundary layer separation in fluid flows.
Ankit Kumar, Pooja Chaubdar, Gyan Sagar Sinha, Atal Bihari Harichandan   +3 more
openaire   +1 more source

Pitching Airfoil with Combined Gurney Flap and Unsteady Trailing-Edge Flap Deflection

AIAA Journal, 2012
b = semispan c = airfoil chord Cl = lift coefficient Cm = pitching moment coefficient Cp = surface pressure coefficient f = oscillation frequency h = Gurney flap height td = flap actuation duration ts = flap actuation start time u1 = freestream velocity = angle of attack ds = dynamic-stall angle f = final angle i = initial angle ss = static stall angle
T. Lee, Y. Y. Su
openaire   +1 more source

Effect of Aspect Ratio on Gurney-Flap Performance

Journal of Aircraft, 2013
A low-speed wind-tunnel investigation has been undertaken to establish the effect of wing aspect ratio on Gurney-flap performance. Characterization is accomplished using a force balance and flow visualization. The Gurney-flap lift increment due to a shift in the zero-lift angle of attack was observed to scale with that of the lift-curve slope for ...
Libin Daniel, Lance W. Traub
openaire   +1 more source

Effect of Gurney Flaps on an Elliptical Airfoil

Journal of Fluids Engineering, 2017
A low-speed wind tunnel investigation is presented characterizing the impact of Gurney flaps on an elliptical airfoil. The chordwise attachment location and height of the flaps were varied, as was the Reynolds number. The results showed strong nonlinearities in the lift curve which were present for all tested geometries.
openaire   +1 more source

Flap Vortex Management by Active Gurney Flaps

46th AIAA Aerospace Sciences Meeting and Exhibit, 2008
Vey, S, Paschereit, C. O., Greenblatt, D., Meyer, R.   +3 more
openaire   +3 more sources