Grille Wing Aerodynamic Characteristics Of The Numerical Simulation

In this paper, in order to find the approaches to reduce the drag levels and enhance the lift-drag ratio for grid fin, the aerodynamic characteristics of the grid fin are calculated with TVD finite volume scheme and wind tunnel tests. According to the complex flow field, a curve-long parameter grid generation technique is applied, and the density of the grid is processed. This paper studies the effect on aerodynamic characteristics of the grid fin geometry by choosing different cross-section shape and thickness outer frame, changing the thickness of internal fins and the density of internal honeycomb, comparing the datas obtained from the corresponding wind tunnel tests. The results show that the frame of the grid fin has the greatest effect on the grid fin drag characteristics, reducing the drag levels and enhancing the lift-drag ratio for grid fin may be obtained by selecting appropriate frame cross-section shape and thickness of grid fin.