Results 211 to 220 of about 3,143,598 (238)

Control of Compressible Dynamics Stall Using Microjets

Volume 2: Symposia, Parts A, B, and C, 2003
Control of the dynamic stall process of an NACA 0015 airfoil undergoing periodic pitching motion is investigated experimentally in a high-speed wind tunnel facility. Multiple microjet nozzles distributed uniformly in the first 15% chord from the airfoil’s leading edge are used for the control. Point Diffraction Interferometry (PDI) technique is used to
Shih, C., Beahn, J., Krothapalli, A., Chandrasekhara, M.S.   +3 more
openaire   +2 more sources

A computational study on the dynamic stall of a flapping airfoil

16th AIAA Applied Aerodynamics Conference, 1998
The dynamic stall boundaries of a NACA 0012 airfoil oscillating in either the pure plunge mode or in the combined pitch and plunge mode is computed using a thin-layer Navier-Stokes solver. Unsteady flowfields are computed at the free-stream Mach number of 0.3, the Reynolds number of 1 • 10, and the Baldwin-Lomax turbulence model is employed.
Tuncer, Ismail, Walz, Ralf, Platzer, Max F.   +2 more
openaire   +2 more sources

Compressible studies on dynamic stall

27th Aerospace Sciences Meeting, 1989
The purpose of this work is to investigate the effects of compressibility on the dynamic stall phenomenon by numerical simulation of the unsteady flow. The full two-dimensional unsteady compressible Navier-Stokes equations are solved for flows over oscillating airfoils and airfoils pitching rapidly to high angles of attack.
openaire   +1 more source

STALL FLUTTER OF HELICOPTER ROTOR BLADES: A SPECIAL CASE OF THE DYNAMIC STALL PHENOMENON

Proceedings of the Vertical Flight Society Forum 23 - Washington, D.C. 1967, 1967
Recent studies described in Refs. 1 and 2 have shown that the negative damping in pitch associated with airfoils oscillating at high mean angles of attack can lead to torsional instability of helicopter rotor blades under certain conditions. The mechanism of the instability was shown in Ref.
openaire   +1 more source

Review of Rotating Wing Dynamic Stall: Experiments and Flow Control

Progress in Aerospace Sciences, 2023
Marilyn J Smith, Anthony D Gardner, Jonathan Naughton   +2 more
exaly  

Dynamic Stall

2022
openaire   +1 more source

Dynamic Stall of the Wind Turbine Airfoil and Blade Undergoing Pitch Oscillations: A Comparative Study

Energy, 2021
Tongguang Wang, Yingning Qiu, Chengyong Zhu   +2 more
exaly  

Combined Effect of Passive Vortex Generators and Leading-Edge Roughness on Dynamic Stall of the Wind Turbine Airfoil

Energy Conversion and Management, 2022
Tongguang Wang, Yingning Qiu, Chengyong Zhu   +2 more
exaly  

Numerical Investigation of Dynamic Stall Suppression of Rotor Airfoil via Improved Co-Flow Jet

Chinese Journal of Aeronautics, 2022
Rongqian Chen, Jiaqi Liu
exaly  

On the Influence of Blade Thickness-to-Chord Ratio on Dynamic Stall Phenomenon in H-Type Darrieus Wind Rotors

Energy Conversion and Management, 2020
Ujjwal K Saha, Siddhant Jain
exaly