Optimal Design of Leading-Edge and Aerodynamic Analysis of Parafoil
Because of its excellent gliding ability and aerodynamic performance,parafoil has a wide range of appli-cation prospects in aerospace and other fields,so the aerodynamic analysis of parafoil is particularly important.The leading-edge of the parafoil is one of the important features that distinguish the parafoil from the wing.The analysis and improvement of the leading-edge of the parafoil can effectively improve the aerodynamic performance of the parafoil.The finite volume method was used to solve the two-dimensional incompressible Reynolds time-averaged Navier-Stokes equation,and the numerical simulation data was basically consistent with the original airfoil test data.The calculation results showed that the existence of the incision interferes with the airflow movement of the leading-edge of the airfoil,which was manifested in the generation of separation bubbles on the upper and lower surfaces of the leading-edge,which reduced the lift of the airfoil and greatly increased the resistance of the airfoil.Aiming at the same cutout,the configuration of the double lip of the leading edge was designed,and compared with the original cut-out airfoil,the aerodynamic performance of the improved cutout airfoil was better than the original cutout airfoil in the entire angle of attack range.The configuration of the double lip of the leading edge effectively restrained the genera-tion of separation bubbles at the cutout,and delayed the stall of the cutout airfoil to a certain extent.This paper can provide a reference for the optimal design of the leading-edge of the parafoil.
万方数据
维普
