scholarly journals Response of a Flat Plate Wing to a Transverse Gust at Low Reynolds Numbers

2018 ◽  
Author(s):  
Simon J. Corkery ◽  
Holger Babinsky ◽  
John Harvey
Keyword(s):  
Flat Plate ◽  
Reynolds Numbers ◽  
Low Reynolds Numbers ◽  
Low Reynolds

On High-Performance Airfoil at Very Low Reynolds Number

2016 ◽  
Vol 28 (3) ◽  
pp. 273-285
Author(s):  
Katsuya Hirata ◽  
◽  
Ryo Nozawa ◽  
Shogo Kondo ◽  
Kazuki Onishi ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Flat Plate ◽  
High Performance ◽  
Low Reynolds Number ◽  
Three Dimensional ◽  
Reynolds Numbers ◽  
Aerodynamic Characteristics ◽  
Slow Flow ◽  
Low Reynolds Numbers ◽  
Low Reynolds

[abstFig src='/00280003/02.jpg' width=""300"" text='Iso-Q surfaces of very-slow flow past an iNACA0015' ] The airfoil is often used as the elemental device for flying/swimming robots, determining its basic performances. However, most of the aerodynamic characteristics of the airfoil have been investigated at Reynolds numbers Re’s more than 106. On the other hand, our knowledge is not enough in low Reynolds-number ranges, in spite of the recent miniaturisation of robots. In the present study, referring to our previous findings (Hirata et al., 2011), we numerically examine three kinds of high-performance airfoils proposed for very-low Reynolds numbers; namely, an iNACA0015 (the NACA0015 placed back to front), an FPBi (a flat plate blended with iNACA0015 as its upper half) and an FPBN (a flat plate blended with the NACA0015 as its upper half), in comparison with such basic airfoils as a NACA0015 and an FP (a flat plate), at a Reynolds number Re = 1.0 × 102 using two- and three-dimensional computations. As a result, the FPBi shows the best performance among the five kinds of airfoils.

scholarly journals Unsteadiness in Flow over a Flat Plate at Angle-of-Attack at Low Reynolds Numbers

2007 ◽  
Author(s):  
Kunihiko Taira ◽  
William Dickson ◽  
Tim Colonius ◽  
Michael Dickinson ◽  
Clarence Rowley
Keyword(s):  
Flat Plate ◽  
Angle Of Attack ◽  
Reynolds Numbers ◽  
Low Reynolds Numbers ◽  
Low Reynolds

Slip flow past a tangential flat plate at low Reynolds numbers

1978 ◽  
Vol 85 (4) ◽  
pp. 731-742 ◽  
Author(s):  
Ko Tamada ◽  
Hiroyuki Miura
Keyword(s):  
Flat Plate ◽  
Stokes Equations ◽  
Equations Of Motion ◽  
Slip Flow ◽  
Reynolds Numbers ◽  
Velocity Change ◽  
Local Skin ◽  
Low Reynolds Numbers ◽  
Main Portion ◽  
Low Reynolds

In this paper the slip flow of viscous fluid at low Reynolds numbers past a flat plate aligned with the flow is studied theoretically on the basis of Oseen-Stokes equations of motion. An integral equation for the distribution of fundamental singularities representing the plate is derived and solved approximately in the vicinity of the edge and main portion of the plate. A formula for the local skin friction is obtained and discussed numerically. It is also shown that the slippage of the flow gives rise to reduction of the drag force on the plate by an amount O(K|ln K|), where K is the Knudsen number. The velocity change near the edge of the plate is of particular interest and is found to be logarithmically singular there.

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