Author:
LEE CHANGHOON,KIM JOHN,CHOI HAECHEON
Abstract
Two simple feedback control laws for drag reduction are derived
by applying a
suboptimal control theory to a turbulent channel flow. These new feedback
control
laws require pressure or shear-stress information only at the wall, and
when applied
to a turbulent channel flow at Reτ=110, they result
in
16–22% reduction in the
skin-friction drag. More practical control laws requiring only the local
distribution of
the wall pressure or one component of the wall shear stress are also derived
and are
shown to work equally well.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Cited by
160 articles.
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