Optimization of shark shield scale bionic surface unit structure and its drag reduction performance research
In order to further improve the drag reduction effect of shark shield scale bionic surface,the optimization design of unit structure parameters of shark shield scale is carried out.The unit structure model of the bionic surface of the shark shield scale is designed,and the basic value range of the unit structure parameters is calculated according to the dimen-sionless formula of the microstructure size,and the influence of different parameters on the drag reduction effect is analyzed by numerical simulation;the optimal combination of the unit structure parameters is obtained according to the analytical res-ults,and the influence of the layout on the drag reduction effect is analyzed by numerical simulation.The numerical simula-tion results show that the shark shield scale bionic surfaces with different structural parameters have the drag reduction ef-fect in 1～9 m/s,among which the surface has the best drag reduction effect when the rib angle is θ=75°,the rib width d=0.1 mm,and the rib spacing H=2 mm,and the drag reduction rate can reach 22.25％at the highest.The shield scale structure can slow down the increase of boundary layer velocity,improve the stability of boundary layer flow,and finally realize the drag reduction effect.
万方数据
维普
