Results 241 to 250 of about 332,136 (301)

Performance improvement of a vortex pump based on volute shape modification. [PDF]

Sci Rep
Lan K, Heng Y, Jiang Q, Tu Y, Wang C, Ge J.   +5 more
europepmc   +1 more source

Hydrodynamic Efficiency and Wake Interactions in Fish School Swimming. [PDF]

Biomimetics (Basel)
Huang H, Yang Z, Liu J, Pang J, Wu Z, Wen H, Li S.   +6 more
europepmc   +1 more source

Butterfly Clap-Fling Flight Mechanisms Observed by Schlieren Imaging for the Design of Bio-Inspired Micro Air Vehicles. [PDF]

Biomimetics (Basel)
Prisăcariu EG, Strătilă S, Dumitrescu O, Sima M, Roșu RA, Vlăducă I.   +5 more
europepmc   +1 more source

Validation of an actuator line CFD model for tidal rotors in waves.

J Fluids Struct
Zilic de Arcos F, McNaughton J, Vogel CR, Willden RHJ, Pinon G.   +4 more
europepmc   +1 more source

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Connection between leading-edge sweep, vortex lift, and vortex strength for delta wings

Journal of Aircraft, 1990
An effort is made to clarify the effect of leading-edge sweep on the vortex lift and leading-edge vortex strength of a slender wing; while it is often assumed that increasing sweep enhances vortex lift and strength, the opposite is the case. The suction analogy is used in association with numerical and experimental data to derive simple formulas ...
Michael J Hemsch
exaly   +2 more sources

Remarks on Nonlinear Lift and Vortex Separation

Journal of the Aeronautical Sciences, 1954
exaly   +2 more sources

Lift and the Leading Edge Vortex

50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2012
AbstractFlapping wings often feature a leading-edge vortex (LEV) that is thought to enhance the lift generated by the wing. Here the lift on a wing featuring a leading-edge vortex is considered by performing experiments on a translating flat-plate aerofoil that is accelerated from rest in a water towing tank at a fixed angle of attack of 15°.
Pitt Ford, C. W., Babinsky, H.
openaire   +2 more sources

Leading-Edge Vortex Lifts Swifts

Science, 2004
The current understanding of how birds fly must be revised, because birds use their hand-wings in an unconventional way to generate lift and drag. Physical models of a common swift wing in gliding posture with a 60° sweep of the sharp hand-wing leading edge were tested in a water tunnel.
Videler, J. J., Stamhuis, E. J., Povel, G. D. E.   +2 more
openaire   +2 more sources

Starting vortex and lift on an airfoil

Physics of Fluids A: Fluid Dynamics, 1993
Consider an airfoil which is impulsively started from rest to a constant speed relative to an otherwise quiescent fluid at an angle of attack. The paper attempts to propose a precise definition for the ‘‘starting vortex’’ in viscous flow and investigate how an airfoil gains its lift through the starting vortex.
Chang, Chien-Cheng, Hsiau, Ying-Chien, Chu, Chin-Chou   +2 more
openaire   +2 more sources

Hybrid vortex method for lifting surfaces with free-vortex flow

18th Aerospace Sciences Meeting, 1980
A Nonlinear Hybrid Vortex method (NHV-method) has been developed for predicting the aerodynamic characteristics of wings exhibiting leading- and side-edge separations. This method alleviates the drawbacks of the Nonlinear Discrete Vortex method (NDV-method, also known as the multiple line vortex method.) The NHV-method combines continuous-vorticity and
O. KANDIL, L.-C. CHU, E. YATES, JR.
openaire   +1 more source