Compressible Dynamic Stall Control Using a Variable Droop Leading Edge Airfoil

2003 ◽  
Author(s):  
M. Chandrasekhara ◽  
Preston Martin ◽  
Chee Tung
Keyword(s):  
Leading Edge ◽  
Dynamic Stall ◽  
Stall Control

scholarly journals Inflatable Leading Edge-Based Dynamic Stall Control considering Fluid-Structure Interaction

2020 ◽  
Vol 2020 ◽  
pp. 1-28
Author(s):  
Shi-Long Xing ◽  
He-Yong Xu ◽  
Ming-Sheng Ma ◽  
Zheng-Yin Ye
Keyword(s):  
Lift Coefficient ◽  
Fluid Structure Interaction ◽  
Leading Edge ◽  
Dynamic Stall ◽  
Elastic Membrane ◽  
Radius Of Curvature ◽  
Structural Dynamic ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Stall Control

The inflatable leading edge (ILE) is explored as a dynamic stall control concept. A fluid-structure interaction (FSI) numerical method for the elastic membrane structure is constructed based on unsteady Reynolds-averaged Navier-Stokes (URANS) and a mass-spring-damper (MSD) structural dynamic model. Radial basis function- (RBF-) based mesh deformation algorithm and Laplacian and optimization-based mesh smoothing algorithm are adopted in flowfield simulations to achieve the pitching oscillation of the airfoil and to ensure the mesh quality. An airfoil is considered at a freestream Mach number of 0.3 and chord-based Reynolds number of 3.92×106. The airfoil is pitched about its quarter-chord axis at a sinusoidal motion. The numerical results indicate that the ILE can change the radius of curvature of the airfoil leading edge, which could reduce the streamwise adverse pressure gradient and suppress the formation of dynamic stall vortex (DSV). Although the maximum lift coefficient of the airfoil is slightly reduced during the control process, the maximum drag and pitching moment coefficients of the airfoil are greatly reduced by up to 66% and 75.2%, respectively. The relative position of the ILE has a significant influence on its control effect. The control laws of inflation and deflation also affect the control ability of the ILE.

Dynamic stall control using inflatable leading edge

2020 ◽  
Vol 34 (14n16) ◽  
pp. 2040108 ◽  
Author(s):  
Shi-Long Xing ◽  
He-Yong Xu ◽  
Zheng-Yin Ye ◽  
Ming-Sheng Ma ◽  
Yue Xu
Keyword(s):  
Lift Coefficient ◽  
Leading Edge ◽  
Adverse Pressure Gradient ◽  
Rotor Blades ◽  
Dynamic Stall ◽  
Elastic Membrane ◽  
Radius Of Curvature ◽  
Structural Dynamic ◽  
Pitching Airfoil ◽  
Stall Control

The inflatable leading edge (ILE) as a dynamic stall control concept for helicopter rotor blades was investigated numerically on a dynamically pitching airfoil. A fluid–structure interaction (FSI) numerical method for the elastic membrane structure was constructed based on unsteady Reynolds-averaged Navier–Stokes (URANS) equations and mass spring damper (MSD) structural dynamic model. The numerical results indicate that the ILE can change the radius of curvature of the airfoil leading edge, which could reduce the streamwise adverse pressure gradient and suppress the formation of dynamic stall vortex (DSV). Although the maximum lift coefficient of the airfoil is reduced by 8.2%, the maximum drag and pitching moment coefficients of the airfoil are reduced by up to 50.1% and 55.3%, respectively.

Dynamic Stall Control Using Deployable Leading-Edge Vortex Generators

AIAA Journal ◽  
2012 ◽  
Vol 50 (10) ◽  
pp. 2135-2145 ◽  
Author(s):  
A. Le Pape ◽  
M. Costes ◽  
F. Richez ◽  
G. Joubert ◽  
F. David ◽  
...  
Keyword(s):  
Leading Edge ◽  
Vortex Generators ◽  
Dynamic Stall ◽  
Leading Edge Vortex ◽  
Edge Vortex ◽  
Stall Control

Dynamic stall control on a vertical axis wind turbine aerofoil using leading-edge rod

Energy ◽  
2019 ◽  
Vol 174 ◽  
pp. 246-260 ◽  
Author(s):  
Junwei Zhong ◽  
Jingyin Li ◽  
Penghua Guo ◽  
Yu Wang
Keyword(s):  
Wind Turbine ◽  
Leading Edge ◽  
Vertical Axis ◽  
Dynamic Stall ◽  
Vertical Axis Wind Turbine ◽  
Stall Control

Dynamic Stall Control by Leading Edge Vortex Generators

2008 ◽  
Vol 53 (1) ◽  
pp. 26 ◽  
Author(s):  
Holger Mai ◽  
Guido Dietz ◽  
Wolfgang Geißler ◽  
Kai Richter ◽  
Johannes Bosbach ◽  
...  
Keyword(s):  
Leading Edge ◽  
Vortex Generators ◽  
Dynamic Stall ◽  
Leading Edge Vortex ◽  
Edge Vortex ◽  
Stall Control

Compressible Dynamic Stall Control Using a Variable Droop Leading Edge Airfoil

10.2514/1.472 ◽  
2004 ◽  
Vol 41 (4) ◽  
pp. 862-869 ◽  
Author(s):  
M. S. Chandrasekhara ◽  
P. B. Martin ◽  
C. Tung
Keyword(s):  
Leading Edge ◽  
Dynamic Stall ◽  
Stall Control
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