Results 21 to 30 of about 332,136 (301)

The Aerodynamic Effect of an Alula-like Vortex Generator on a Revolving Wing

Biomimetics, 2022
An alula is a small structure of feathers that prevents birds from stalling. In this study, the aerodynamic effect of an alula-like vortex generator (alula-VG) on a revolving wing was investigated using the PIV technique in a water tank. The alula-VG was
Ping-Han Chung, Po-Hsiang Chang, Szu-I Yeh   +2 more
doaj   +1 more source

Effects of continuously increasing pitching and plunging amplitudes on the aerodynamic forces of flapping airfoils

AIP Advances, 2019
Recently, numerous studies have been conducted to clarify the effects of the increases in pitching and plunging amplitudes of flapping wings on thrust and lift generation. In the present study, the effects of continuously increasing pitching and plunging
Jun Hu, Haibin Xuan, Yong Yu, Jiaolong Zhang   +3 more
doaj   +1 more source

Research on the Separation Control Characteristics of Vortex Flap under Different Reynolds Numbers

Hangkong gongcheng jinzhan, 2021
Inspired by birds raising their feathers to control the separation flow, vortex flap has become an approach to control the separation flow over airfoils at high angles of attack.In this paper, the aerodynamic characteristics and physical mechanism of ...
LIN Lihui, YE Kun, YE Zhengyin
doaj   +1 more source

Comparison of a grid-based CFD method and vortex dynamics predictions of low Reynolds number cylinder flow [PDF]

, 2006
Computational fluid dynamics models range from the finite difference type grid-based method to the Lagrangian style vortex cloud simulation technique for solving the Navier-Stokes equations.
Lewis, R. I., Baranyi, László
core   +2 more sources

Aerodynamic Forces on a Bluff Cylinder in Sinusoidal Streamwise Winds with Different Angles of Attack

Buildings, 2022
In the present study, multiple-fan active control wind tunnel tests are conducted to investigate the aerodynamic forces on a 5:1 rectangular cylinder in sinusoidal streamwise winds with different angles of attack (AoA).
Bo Wu, Jianting Zhou, Jingzhou Xin, Hong Zhang, Liangliang Zhang, Xianyi Yang   +5 more
doaj   +1 more source

Reduced-order aerodynamic model of a starting plate with discrete-vortex merging

Frontiers in Physics
This study employs potential flow theory with a discrete-vortex method to model the unsteady aerodynamics of a flat plate, with a particular focus on the coupled dynamics of leading-edge and trailing-edge vortices (LEVs and TEVs).
Xi Xia, Lingyun Shangguan
doaj   +1 more source

LIFT newsletter 3 (French)

, 2021
This is the third newsletter of the LIFT research project in French ...
LIFT consortium
core   +1 more source

Application of digital particle image velocimetry to insect aerodynamics: measurement of the leading-edge vortex and near wake of a Hawkmoth [PDF]

, 2007
Some insects use leading-edge vortices to generate high lift forces, as has been inferred from qualitative smoke visualisations of the flow around their wings.
Taylor, Graham K., Bomphrey, Richard J., Thomas, Adrian L. R., Lawson, Nicholas J.   +3 more
core   +2 more sources

Experimental and Numerical Studies on the Effect of Airflow Separation Suppression on Aerodynamic Performance of a Ducted Coaxial Propeller in Hovering

Aerospace, 2022
The ducted coaxial propeller (DCP) has great application value in eVTOL aircraft because of its high safety, compactness, and low noise. A numerical simulation method for the DCP is established using the sliding mesh technique.
Junjie Wang, Renliang Chen, Jiaxin Lu
doaj   +1 more source

LIFT newsletter 3 (Hungarian)

, 2021
This is the third newsletter of the LIFT research project in Hungarian ...
LIFT consortium
core   +1 more source