Results 81 to 90 of about 2,745 (210)

A water tunnel study of Gurney flaps [PDF]

Several Gurney flap configurations were tested in the NASA Langley 16 x 24 inch Water Tunnel. These devices provided an increased region of attached flow on a wing upper surface relative to the wing without the flaps.
Neuhart, Dan H., Pendergraft, Odis C., Jr.   +1 more
core   +1 more source

Active Flow Control by Adaptive Blade Systems in Periodic Unsteady Flow Conditions [PDF]

, 2014
A test stand to investigate the rotor-stator interaction of a compressor stage is presented. This water channel allows to investigate the influence of wake depressions and choking to a stator cascade.
Hammer, Steffen, Liebich, Robert, Meyer, Robert, Peter, Julija, Phan, Dat Tien, Thamsen, Paul Uwe, Werder, Tobias   +6 more
core   +1 more source

Comparative Study on Aerodynamic Performance of VAWTs with Different Airfoils Under Dimple-Gurney Flap Synergistic Control

Applied Sciences
The combined control method of dimples and Gurney flaps has proven effective in enhancing the power coefficient of Vertical Axis Wind Turbines (VAWTs). However, the adaptability of this combined control structure to different airfoil geometries remains ...
Tao Jiang, Qiuyun Mo, Liqi Luo, Weihao Liu, Yinglei Zhao, Changhao Qiu   +5 more
doaj   +1 more source

Dynamics of a hybrid morphing wing with active open loop vibrating trailing edge by Time-Resolved PIV and force measures [PDF]

, 2017
A quantitative characterization of the effects obtained by high frequency-low amplitude trailing edge actuation is presented. Particle image velocimetry, pressure and aerodynamic forces measurements are carried out on a wing prototype equipped with shape
Braza, Marianna, Duhayon, Eric, Döll, Carsten, Jodin, Gurvan, Motta, Valentina, Rouchon, Jean-François, Scheller, Johannes   +6 more
core   +3 more sources

Influence of Gurney Flap and Leading-Edge/Trailing-Edge Flaps on the Stall Characteristics and Aeroacoustic Performance of Airfoils

Fluids
In aerospace, flow control techniques have improved the separation flow characteristics around airfoils by various means. In this paper, the delayed detached eddy simulation (DDES) technique is used to simulate the detailed flow field around the NACA0021
Zelin Liu, Kaidi Li, Xiaojing Sun
doaj   +1 more source

Mixed CFD-1D wind turbine diffuser design optimization [PDF]

, 2016
A method to design a diffuser augmented wind turbine (DAWT) is proposed, using as a guiding point the optimal pressure drop at the turbine. The use of concepts and expressions derived from a 1D analytic model helped to reduce the number of computational ...
Ayuso Moreno, Luis Manuel, Franchini Longhi, Sebastian Nicolas, Sant Palma, Rodolfo, Sanz Andres, Angel Pedro, Sorribes Palmer, Felix   +4 more
core   +2 more sources

A novel method to allow noninvasive, longitudinal imaging of the murine immune system in vivo [PDF]

, 2012
In vivo imaging has revolutionized understanding of the spatiotemporal complexity that subserves the generation of successful effector and regulatory immune responses.
Andrea J. White, Butcher, Cardillo, Carragher, Catherine M. Rush, Celli, de Boer, Eric J. Jenkinson, Farr, Fulmer, Gianluca Grassia, Girard, Graham Anderson, Gunn, Hillebrands, Huang, Iain B. McInnes, Itano, James M. Brewer, Karen J. Bryson, Kono, Lane, Leishman, Luther, McNagny, Millington, Pasquale Maffia, Paul Garside, Proudman, Robert A. Benson, Schneider, Smith, Stutzmann, Sumen, Tammela, Tomei, Vivienne B. Gibson, White, Worbs, Yoshida, Zinselmeyer   +40 more
core   +2 more sources

Imaging interactions between the immune and cardiovascular systems in vivo by multiphoton microscopy [PDF]

, 2010
Several recent studies in immunology have used multiphoton laser-scanning microscopy to visualise the induction of an immune response in real time in vivo.
AK Robertson, BH Zinselmeyer, E Galkina, G Shakhar, GK Hansson, H Schneider, JH Huang, MJ Miller, MJ Miller, OR Millington, OR Millington, P Garside, P Maffia, S Celli, S Celli, S Hugues, T Okada, TR Mempel   +17 more
core   +1 more source

Load Reduction Using Rapidly Deployed Trailing-Edge Flaps

, 2009
This thesis details investigations into the aerodynamic properties of a small, rapidlyactuated, actively controlled trailing-edge ap and the potential of such a device to alleviate the unsteady loading experienced by wind turbine blades due to ...
Frederick, Mark, Frederick, Mark
core   +1 more source

Aerodynamics of gurney flaps on a wing in ground effect

AIAA Journal, 2001
A study was performed of a single-element, high-lift wing fitted with Gurney flaps in ground effect. The effect of the Gurney has been quantified in terms of aerodynamic performance and flow field characteristics. The results are of direct relevance to both aeronautical and racing car applications.
Zerihan, Jonathan, Zhang, Xin
openaire   +3 more sources