Scale-Adaptive Simulations of Unsteady Flow around NACA0021 Airfoil at 60° angle of attack

2019 ◽  
Author(s):  
Yue Wang ◽  
Kang Liu ◽  
Wen-Ping Song ◽  
Zhong-Hua Han
Keyword(s):  
Unsteady Flow ◽  
Angle Of Attack ◽  
Adaptive Simulations

Unsteady Flow Around a NACA0021 Airfoil Beyond Stall at 60° Angle of Attack

2009 ◽  
pp. 405-415 ◽  
Author(s):  
R. El Akoury ◽  
M. Braza ◽  
Y. Hoarau ◽  
J. Vos ◽  
G. Harran ◽  
...  
Keyword(s):  
Unsteady Flow ◽  
Angle Of Attack

scholarly journals Studying the unsteady characteristics of a laminar transonic buffet depending on the angle of attack

2021 ◽  
Vol 2057 (1) ◽  
pp. 012009
Author(s):  
P A Polivanov ◽  
A A Sidorenko
Keyword(s):  
Shock Wave ◽  
Unsteady Flow ◽  
High Speed ◽  
Angle Of Attack ◽  
Reynolds Numbers ◽  
Low Reynolds Numbers ◽  
Unsteady Characteristics ◽  
Basic Experiments ◽  
Transonic Buffet ◽  
Amplitude Characteristics

Abstract Laminar transonic buffet on the airfoil for low Reynolds numbers of 0.5-0.7⋅106 was experimentally studied. Basic experiments were performed using high-speed schlieren imaging. The unsteady flow structure was investigated using various methods. It was found that shock wave oscillations can be significantly different from the turbulent case. The frequency and amplitude characteristics of oscillations from the angle of attack were found.

Cascade Vortical Gust Response Including Steady Loading Effects

1995 ◽  
Author(s):  
Gregory H. Henderson ◽  
Sanford Fleeter
Keyword(s):  
Unsteady Flow ◽  
Angle Of Attack ◽  
Separated Flow ◽  
Dynamic Stall ◽  
Perforated Plates ◽  
Stator Vane ◽  
Loading Effects ◽  
Series Of Experiments ◽  
Flow Effects ◽  
Gust Response

A series of experiments are performed to investigate the effect of steady loading and separated flow on the unsteady vortical gust response of both low and high solidity blade rows, including the effects of airfoil camber. This is accomplished utilizing a unique single stage turbomachine research facility in which the flow is not generated by the blading but rather by an additional fan. This provides the ability to quantify the steady or mean performance of the stator row over a range of steady loading levels both with and without unsteady flow effects. In particular, for a particular mean stator angle-of-attack, the steady and mean aerodynamic performance are determined in a steady flow and also in an unsteady flow generated by a rotor composed of perforated plates at the same mean operating condition. This enables the stator vane row dynamic stall conditions to be identified. The unsteady aerodynamic response of both symmetric and cambered stator vanes configured as low and high solidity stator vane rows is then investigated over a range of mean angle-of-attack values, including attached and separated flows with dynamic stall.

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