Numerical Investigation of a Blade Riblet Surface for Drag Reduction Applications with Large Eddy Simulation Method

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Fully developed turbulent channel flow with a blade riblet surface has been simulated numerically at Reynolds number by Large Eddy Simulations (LES). The blade riblet is shown to provide a total viscous drag reduction approximately 9% with the riblet spacing and the cross section . For the sake of investigating the interaction of the turbulent flow with riblets, the mean velocity profiles, velocity fluctuations, and instantaneous flow visualization have been analyzed. It has been found that the riblet of certain size reduces drag by damping the dynamics and weakening the cross motions in the near-wall boundary layer, revealing beneficial turbulence controlling.

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Periodical:

Edited by:

Li Kai

Pages:

315-319

Citation:

N. H. Wu et al., "Numerical Investigation of a Blade Riblet Surface for Drag Reduction Applications with Large Eddy Simulation Method", Applied Mechanics and Materials, Vol. 187, pp. 315-319, 2012

Online since:

June 2012

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$38.00

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