格壁剖面形状不同的栅格翼其升力性能也大有不同,前期研究表明菱形剖面和四角形剖面栅格翼比矩形剖面栅格翼减阻能力更好。文中基于此对后掠45°的栅格翼进行数值模拟研究,结果表明,投影尺寸相同的3种四边形后掠式栅格翼与其正置式相比均能够有效提高升力,增大升阻比,并且菱形和四角形剖面后掠式的栅格翼气动特性均优于矩形剖面后掠式栅格翼。

The lifting performance of grid fins with different grid sections was also different. Early research showed that the diamondshaped section and the four angle section grid fins had better drag reduction ability than the rectangular section grid fins. Based on that, the grid fin with 45 degree sweepback was studied by numerical simulation. Results showed that three types of quadrilateral sweptback grid fins and its positive set were able to effectively improve the lift and increase the lift drag ratio. And the aerodynamic characteristics of the diamond-shaped section and four angular section sweptback grid fins were better than the rectangular section sweptback grid fins.