Abstract
The aerodynamic drag reduction characteristics of superhydrophobic structures were numerically simulated using Reynolds averaged N-S equations and SST k-ω turbulence model. The drag reduction mechanism, flow field and main factors affecting drag reduction characteristics are studied. The results show that the vortex in superhydrophobic structure reduces viscous drag and produces pressure differential drag. The drag reduction characteristics of superhydrophobic structure is the result of the interaction of these two forces. The free shear area ratio and the free stream Mach number are the main factors affecting the drag reduction characteristics of super hydrophobic structures. The drag reduction rate of superhydrophobic structure increase with the increase of free shear area ratio, decrease with the increase of Mach number in the given Mach number range.
Published Version
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