Numerical calculation study of influence of grid fin configuration parameters on aerodynamic characteristics

The influence of grid number, web thickness and web cross-section shapes on the aerodynamic characteristics of grid fins was studied by a numerical simulation method based on computational fluid dynamics. The result indicates that when the numbers of grids are increased, both drag force and lift force are increased, the drag force is more significantly affected by grid numbers; the drag force is significantly affected by web thickness, the lift force is less affected by that, and the larger the web thickness is, the larger the drag force is; shaping the web cross-section of grid fin can largely decrease the drag force of grid fin, but less affect the lift force.