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Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   JULY 2017 , Volume 17 , Number 4 ; Page(s) 359 To 368.
 
Paper: 

EFFECTS OF VARIOUS PARAMETERS ON DYNAMIC STALL BEHAVIOR AND AERODYNAMIC COEFFICIENTS OF A NACA0012 AIRFOIL

 
 
Author(s):  ABDIZADEH GHOLAM REZA, AHMADVAND HAMID, JAFARI MOHAMMAD MEHDI*
 
* DEPARTMENT OF AEROSPACE ENG, MALEK ASHTAR UNIVERSITY OF TECH, TEHRAN, IRAN
 
Abstract: 

Dynamic stall behavior of a NACA0012 airfoil undergoing pitching motion has been studied by a numerical approach. The turbulence intensity, oscillation frequency and amplitude and the Reynolds number were found to be the major contributors in dynamic stall. The flow field structure and the associated vortices for this airfoil as well as the impact of the oscillation frequency on aerodynamic efficiency were also studied. The simulations were two dimensional and the k-w SST turbulence model was utilized for the present analysis. The results show that increasing the oscillation frequency and amplitude and the turbulence intensity, postpones the dynamic stall to higher angles of attack.
Furthermore, as the Reynolds number is increased, both the lift coefficient and the width of the associated hysteresis loop decrease. The airfoil aerodynamic efficiency variation with oscillation frequency has been shown to have a maximum point for all angles of attack considered. The flow field structure revealed that the main cause of the dynamic stall is a series of low pressure vortices formed at the leading edge which shed into downstream and separate from the surface. A secondary vortex will then appear and increase the lift coefficient dramatically. The present simulation results are in a good agreement with those found in the literature.

 
Keyword(s): OSCILLATING AIRFOIL, DYNAMIC STALL, FLOW STRUCTURE, VORTEX
 
 
References: 
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Citations: 
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+ Click to Cite.
APA: Copy

ABDIZADEH, G., & AHMADVAND, H., & JAFARI, M. (2017). EFFECTS OF VARIOUS PARAMETERS ON DYNAMIC STALL BEHAVIOR AND AERODYNAMIC COEFFICIENTS OF A NACA0012 AIRFOIL. MODARES MECHANICAL ENGINEERING, 17(4 ), 359-368. https://www.sid.ir/en/journal/ViewPaper.aspx?id=572806



Vancouver: Copy

ABDIZADEH GHOLAM REZA, AHMADVAND HAMID, JAFARI MOHAMMAD MEHDI. EFFECTS OF VARIOUS PARAMETERS ON DYNAMIC STALL BEHAVIOR AND AERODYNAMIC COEFFICIENTS OF A NACA0012 AIRFOIL. MODARES MECHANICAL ENGINEERING. 2017 [cited 2021July25];17(4 ):359-368. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=572806



IEEE: Copy

ABDIZADEH, G., AHMADVAND, H., JAFARI, M., 2017. EFFECTS OF VARIOUS PARAMETERS ON DYNAMIC STALL BEHAVIOR AND AERODYNAMIC COEFFICIENTS OF A NACA0012 AIRFOIL. MODARES MECHANICAL ENGINEERING, [online] 17(4 ), pp.359-368. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=572806.



 
 
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