Boundary layer measurements on an airfoil in cascade using laser Doppler anemometry

1986 ◽  
Keyword(s):  
Boundary Layer ◽  
Laser Doppler Anemometry ◽  
Laser Doppler

scholarly journals Investigation of the flow inside an urban canopy immersed into an atmospheric boundary layer using laser Doppler anemometry

2018 ◽  
Vol 59 (5) ◽  
Author(s):  
Sophie Herpin ◽  
Laurent Perret ◽  
Romain Mathis ◽  
Christian Tanguy ◽  
Jean-Jacques Lasserre
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Laser Doppler Anemometry ◽  
Urban Canopy ◽  
Laser Doppler

The Wingtip Vortex of a Dimpled Wing With an Endplate

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
Christopher C. Beves ◽  
Tracie J. Barber
Keyword(s):  
Boundary Layer ◽  
Laser Doppler Anemometry ◽  
Flow Characteristics ◽  
Ground Effect ◽  
Laser Doppler ◽  
Vortex Generators ◽  
Large Region ◽  
Wingtip Vortex ◽  
High Turbulence

Dimples used as sub-boundary layer vortex generators have been shown to reduce wake size at large angles of incidence. The effect these dimples have on wingtip vortices with an endplate is measured via laser Doppler anemometry (LDA) on an inverted Tyrrell026 airfoil (ReC = 0.5 × 105 and chord = 0.075 m) in ground effect in order to determine the flow characteristics for this configuration and to see if previous measurements were performed in a thinner part of the wake due to any potential wake waviness. The strength of the wingtip vortex for the dimpled wing is 10% higher than the “clean” wing immediately downstream. The clean wing has large region of high turbulence throughout the wake, and the dimples reduce this by 50%. The net result is that dimples drastically improve the flow in the wake of the wing and endplate.

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