Research on method for optimization design of riblets angle based on CFD techniques

The V-shaped riblets reduction characteristic was numerically simulated based on CFD techniques, and the Reynolds Averaged Navier-Stokes equations and RNG k-ε turbulence model were adopted in the simulation process. An optimization design method for V-shaped riblets angle is explored by using iSIGHT platform integrated with CFD software FLUENT. The design scheme of the method was analyzed and compared with the initial design scheme. The analyzed and compared results show that V-shaped riblets drag decreases after optimization design, the relative drag reduction reaches 5.5%, the drag-reducing effect of riblets is greatly improved compared with the initial value, which provides a new optimization design method for V-shaped riblets.