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A numerical study of drag reduction by mini-belts in a smooth wall turbulent boundary layer

Published online by Cambridge University Press:  04 July 2016

L. Djenidi ,
R. A. Antonia  and
A. M. Savill
L. Djenidi
Affiliation:
Department of Mechanical Engineering, University of Newcastle, Australia
R. A. Antonia
Affiliation:
Department of Mechanical Engineering, University of Newcastle, Australia
A. M. Savill
Affiliation:
Department of Engineering, University of Cambridge, UK
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Abstract

A numerical study of drag reduction by mini-belts in a smooth wall turbulent boundary layer is carried using a second-moment closure turbulence model. The main objective of this exploratory work is to investigate the possibility of using mini-belts, driven by frictional drag only, to reduce the drag of a smooth wall. The results clearly show that such technique can be an effective and cheap means for achieving drag reduction. Furthermore, it is observed that, in contrast to riblets, the use of mini-belts does not suffer from geometrical or size constraints in the context of drag reduction. Also mini-belts will always reduce the skin friction regardless of the flow regime (laminar, transitional and turbulent). These advantages may quite well balance the major difficulty related to their mounting in practical situations

Type
Research Article
Information
The Aeronautical Journal , Volume 107 , Issue 1075 , September 2003 , pp. 559 - 564
Copyright
Copyright © Royal Aeronautical Society 2003 

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