AERODYNAMIC PERFORMANCE AND FLOW STRUCTURE OVER A THIN AIRFOIL UNDER SMOOTH AND TURBULENT CONDITIONS AT LOW REYNOLDS NUMBERS

2011 ◽  
Vol 18 (3) ◽  
pp. 253-274 ◽  
Author(s):  
Sridhar Ravi ◽  
P. Petersen ◽  
S. Watkins ◽  
M. Marino ◽  
J. Watmuff
Keyword(s):  
Flow Structure ◽  
Reynolds Numbers ◽  
Aerodynamic Performance ◽  
Low Reynolds Numbers ◽  
Thin Airfoil ◽  
Low Reynolds

A Computational Study on Airfoils at a Low Reynolds Number

2000 ◽  
Author(s):  
Ajit Pal Singh ◽  
S. H. Winoto ◽  
D. A. Shah ◽  
K. G. Lim ◽  
Robert E. K. Goh
Keyword(s):  
Reynolds Number ◽  
Computational Analysis ◽  
Computational Study ◽  
Low Reynolds Number ◽  
Micro Air Vehicles ◽  
Reynolds Numbers ◽  
Aerodynamic Performance ◽  
Low Reynolds Numbers ◽  
Study Results ◽  
Low Reynolds

Abstract Performance characteristics of some low Reynolds number airfoils for the use in micro air vehicles (MAVs) are computationally studied using XFOIL at a Reynolds number of 80,000. XFOIL, which is based on linear-vorticity stream function panel method coupled with a viscous integral formulation, is used for the analysis. In the first part of the study, results obtained from the XFOIL have been compared with available experimental data at low Reynolds numbers. XFOIL is then used to study relative aerodynamic performance of nine different airfoils. The computational analysis has shown that the S1223 airfoil has a relatively better performance than other airfoils considered for the analysis.

scholarly journals Flow Structure and Force Generation on Flapping Wings at Low Reynolds Numbers Relevant to the Flight of Tiny Insects

Fluids ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 45 ◽  
Author(s):  
Arvind Santhanakrishnan ◽  
Shannon Jones ◽  
William Dickson ◽  
Martin Peek ◽  
Vishwa Kasoju ◽  
...  
Keyword(s):  
Flow Structure ◽  
Reynolds Numbers ◽  
Force Generation ◽  
Flapping Wings ◽  
Low Reynolds Numbers ◽  
Low Reynolds

Aerodynamic Analysis of a Localized Flexible Airfoil at Low Reynolds Numbers

2012 ◽  
Vol 11 (4) ◽  
pp. 1300-1310 ◽  
Author(s):  
Wei Kang ◽  
Jia-Zhong Zhang ◽  
Pei-Hua Feng
Keyword(s):  
Stokes Equations ◽  
Reynolds Numbers ◽  
Aerodynamic Performance ◽  
The Self ◽  
Navier Stokes ◽  
Shallow Arch ◽  
Navier Stokes Equations ◽  
Low Reynolds Numbers ◽  
Excited Vibration ◽  
Low Reynolds

AbstractA localized flexible airfoil at low Reynolds numbers is modeled and the aerodynamic performance is analyzed numerically. With characteristic based split scheme, a fluid solver for two dimensional incompressible Navier-Stokes equations is developed under the ALE framework, coupled with the theory of shallow arch, which is approximated by Galerkin method. Further, the interactions between the unsteady flow and the shallow arch are studied in detail. In particular, the effect of the self-excited vibration of the structure on aerodynamic performance of the airfoil is investigated deeply at various angles of attack. The results show that the lift-to-drag ratio has been increased greatly compared with the rigid airfoil. Finally, the relationship between the self-excited vibration and the evolution of the flow is analyzed using FFT tools.

The flow over a thin airfoil subjected to elevated levels of freestream turbulence at low Reynolds numbers

2012 ◽  
Vol 53 (3) ◽  
pp. 637-653 ◽  
Author(s):  
Sridhar Ravi ◽  
Simon Watkins ◽  
Jon Watmuff ◽  
Kevin Massey ◽  
Phred Petersen ◽  
...  
Keyword(s):  
Reynolds Numbers ◽  
Freestream Turbulence ◽  
Low Reynolds Numbers ◽  
Thin Airfoil ◽  
Low Reynolds
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