Active drag reduction using selective low rate suction

2000 ◽  
Author(s):  
Michael Kerho ◽  
Joseph Heid ◽  
Brian Kramer ◽  
Terry Ng
Keyword(s):  
Drag Reduction ◽  
Low Rate ◽  
Active Drag

scholarly journals Hydrodynamic sensing does not facilitate active drag reduction in the golden shiner (Notemigonus crysoleucas)

2010 ◽  
Vol 213 (8) ◽  
pp. 1309-1319 ◽  
Author(s):  
M. J. McHenry ◽  
K. B. Michel ◽  
W. Stewart ◽  
U. K. Muller
Keyword(s):  
Drag Reduction ◽  
Golden Shiner ◽  
Notemigonus Crysoleucas ◽  
Active Drag

Recent Advances in Wake Dynamics and Active Drag Reduction of Simple Automotive Bodies

2021 ◽  
Author(s):  
Yu Zhou ◽  
Bingfu Zhang
Keyword(s):  
Machine Learning ◽  
Drag Reduction ◽  
Closed Loop ◽  
Three Dimensional ◽  
The Body ◽  
Flow Structures ◽  
Slant Angle ◽  
Reduction Mechanisms ◽  
Reduction Methods ◽  
Active Drag

Abstract This is a compendium of recent progresses in the development of wake dynamics and active drag reduction of three-dimensional simple automotive models, largely focused on the generic Ahmed body. It covers our new understanding of involved instabilities, predominant frequencies, pressure distribution and unsteady flow structures in the high- (12.5° < f < 30°) and low-drag (f > 30°) bodies and the square-back body (f = 0°), where f is the rear slant angle of the body. Various drag reduction methods and their performances are reviewed, including open- and closed-loop controls along with machine-learning control. The involving drag reduction mechanisms, net saving and efficiencies are discussed. Comments are made for the areas that deserve more attention and future investigation.

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