Simulation Analysis of Drag-Reduction Effect by Dimpled Surfaces with Quasicrystal and Crystal Lattice Arrangment

Based on the experimental results that two-dimensional dimpled surface structure arranged in 12-fold quasicrystal lattice could effectively reduce drag, a model of two-dimensional Fraunhofer diffraction wave is built in this paper to simulate and analyse the effect characteristics of disturbed waves which generated by two-dimensional quasicrystal and periodic crystal structure. The simulated results show that the intensity distribution of diffraction peaks with 12-fold quasicrystal structure is more uniform and the intensities of diffraction peaks are much smaller in the streamwise direction than that of other structures, meanwhile along spanwise direction it has less strong diffraction peaks, from which it can realize effective drag reduction.