Author: Sasi Kumar Digavalli
Publisher:
ISBN:
Category :
Languages : en
Pages : 426
Book Description
Dynamic Stall of a NACA 0012 Airfoil in Laminar Flow
Author: Sasi Kumar Digavalli
Publisher:
ISBN:
Category :
Languages : en
Pages : 426
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 426
Book Description
Dynamic Stall Experiments on the NACA 0012 Airfoil
Author: Kenneth W. McAlister
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 172
Book Description
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 172
Book Description
Leading Edge Flow Structure of a Dynamically Pitching NACA 0012 Airfoil
Author: Brandon James Pruski
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The leading edge flow structure of the NACA 0012 airfoil is experimentally investigated under dynamic stall conditions (M = 0.1; a = 16.7°, 22.4°, Rec = 1 x 106) using planar particle image velocimetry. The airfoil was dynamically pitched about the 1/4 chord at a reduced frequency, k = 0.1. As expected, on the upstroke the flow remains attached in the leading edge region above the static stall angle, whereas during downstroke, the flow remains separated below the static stall angle. A phase averaging procedure involving triple velocity decomposition in combination with the Hilbert transform enables the entire dynamic stall process to be visualized in phase space, with the added benefit of the complete phase space composed of numerous wing oscillations. The formation and complex evolution of the leading edge vortex is observed. This vortex is seen to grow, interact with surrounding vorticity, detach from the surface, and convect downstream. A statistical analysis coupled with instantaneous realizations results in the modification of the classical dynamic stall conceptual model, specifically related to the dynamics of the leading edge vortex. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148372
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The leading edge flow structure of the NACA 0012 airfoil is experimentally investigated under dynamic stall conditions (M = 0.1; a = 16.7°, 22.4°, Rec = 1 x 106) using planar particle image velocimetry. The airfoil was dynamically pitched about the 1/4 chord at a reduced frequency, k = 0.1. As expected, on the upstroke the flow remains attached in the leading edge region above the static stall angle, whereas during downstroke, the flow remains separated below the static stall angle. A phase averaging procedure involving triple velocity decomposition in combination with the Hilbert transform enables the entire dynamic stall process to be visualized in phase space, with the added benefit of the complete phase space composed of numerous wing oscillations. The formation and complex evolution of the leading edge vortex is observed. This vortex is seen to grow, interact with surrounding vorticity, detach from the surface, and convect downstream. A statistical analysis coupled with instantaneous realizations results in the modification of the classical dynamic stall conceptual model, specifically related to the dynamics of the leading edge vortex. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/148372
NASA Technical Paper
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 172
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 172
Book Description
Analysis of Strong-interaction Dynamic Stall for Laminar Flow on Airfoils
Author: H. J. Gibeling
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 84
Book Description
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 84
Book Description
Unsteady Airfoil Stall and Stall Flutter
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 156
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 156
Book Description
Analysis of the Development of Dynamic Stall Based on Oscillating Airfoil Experiments
Author: Lawrence W. Carr
Publisher:
ISBN:
Category : Oscillating wings (Aerodynamics)
Languages : en
Pages : 116
Book Description
Publisher:
ISBN:
Category : Oscillating wings (Aerodynamics)
Languages : en
Pages : 116
Book Description
Suppression of Dynamic Stall with a Leading-edge Slat on a VR-7 Airfoil
Author: K. W. McAlister
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 80
Book Description
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 80
Book Description
Effect of Turbulence Modeling on Dynamic Stall of a NACA 0012 Airfoil
Author: Mustafa Dindar
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Unsteady Flow Past a NACA 0012 Airfoil Pitching at Constant Rates
Author: Luiz M. Lourenco
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 86
Book Description
Publisher:
ISBN:
Category : Aerofoils
Languages : en
Pages : 86
Book Description