scholarly journals Effects of distributed leading-edge roughness on aerodynamic performance of a low-Reynolds-number airfoil: an experimental study

2018 ◽  
Vol 8 (3) ◽  
pp. 201-207 ◽  
Author(s):  
Yan Zhang
Keyword(s):  
Experimental Study ◽  
Reynolds Number ◽  
Low Reynolds Number ◽  
Leading Edge ◽  
Aerodynamic Performance ◽  
Edge Roughness ◽  
Low Reynolds ◽  
Low Reynolds Number Airfoil

scholarly journals Computational Fluid Dynamic Analysis of Vortex Generators on MAV.

2022 ◽  
pp. 58-73
Author(s):  
Vadla Raghavender ◽  
Priyanka Vatte ◽  
V Varun ◽  
M. Pala. Prasad Reddy
Keyword(s):  
Reynolds Number ◽  
Fluid Dynamic ◽  
Low Reynolds Number ◽  
Leading Edge ◽  
Vortex Generators ◽  
Computational Fluid Dynamic Analysis ◽  
Aerial Vehicle ◽  
Low Reynolds ◽  
Low Reynolds Number Airfoil ◽  
And Control

Micro Vortex generators are very small components deployed on the wings to control airflow over the upper surface of the wing to affect the boundary layer over it. These are employed onto a Micro aerial vehicle (MAV) of fixed wing type with an S5010 which is a low Reynolds number airfoil. This airfoil provides good aerodynamic results as compared to many low Reynolds number airfoils. Micro vortex generators are used to enhance the performance through controlling airflow at different speeds and angle of attack. The comparison of a half part of the MAV wing which is designed in CATIA, with and without the vortex generators on its leading edge at 10% of its chord length is done to show how the vortex generators improve the performance and control authority at different speeds and angle of attacks. These are shown with the velocity and pressure distribution around the wing by considering laminar flow in the simulation.

Novel Tubercle Design for a Wind Turbine Blade Operating at Low Reynolds Number

2019 ◽  
Author(s):  
R. Deeksha ◽  
Mahesh K. Varpe
Keyword(s):  
Reynolds Number ◽  
Wind Turbine ◽  
Amplitude Ratio ◽  
Low Reynolds Number ◽  
Lift Coefficient ◽  
Leading Edge ◽  
Aerodynamic Performance ◽  
Operating Conditions ◽  
Operating Condition ◽  
Low Reynolds

Abstract Wind energy has become one of the vital sustainable energy resources and a leading contender to the renewable resources race. The need of extending the aerodynamic performance of a wind turbine paved the way for radical approaches in the design of wind turbine blades. One such promising technique is the adoption of passive flow controls like leading edge protuberance or tubercles. In this paper the aerodynamic performance of NACA0009 (baseline) superimposed with a leading edge protuberance is numerically investigated in the post-stall operating conditions. The investigation objective was to identify the optimum pitch to amplitude ratio of the protuberance in the post stall operating condition for a low Reynolds number of 5 × 104. Computational fluid dynamics computations were performed using κ-ω SST turbulence model. The optimum pitch to amplitude ratio was found to be 6 which enhanced the aerodynamic lift coefficient by 42% in the post stall operating condition. The lift is reduced at lower AOA but gets complement in the post stall operating conditions.

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