低雷诺数下螺旋桨翼型非定常气动性能的比较

为得到适用于平流层螺旋桨桨叶叶素的翼型,采用数值方法,通过改变气流速度和攻角,比较研究了低雷诺数下8种典型翼型的非定常气动性能.结果显示,大攻角工况下翼型容易发生流动分离现象,翼型吸力面的分离越严重,气动力的振荡幅度越大.通过比较不同攻角和不同速度下翼型的升阻比大小和气动稳定性得出,SD 8000 - PT翼型具有较高的升阻比和较稳定的气动力,适合作为螺旋桨的翼型.

Comparison Study of the Propeller Aerofoil Unsteady Aerodynamic Characteristics in Low Renault Number

This paper was aiming to find an airfoil suit for stratosphere propeller aerofoil.The unsteady aerodynamics characteristics of eight typical airfoils were numerical comparison study at low Renault Number condition through change the velocity and attack angle of compound airflow.The result showed that flow separation would become more acutely if the attack angle increased and aerodynamic of airfoil would become instability if flow separation prick up.The lift drag ratio and aerodynamic stability of different airfoils were comparative studied in different attack angle and different Ma,and it could be seeing that the lift drag ratio of SD 8000-PT airfoil wais high and aerodynamic was more steady between the eight typical airfoils studied in this paper,so it was more suitable for screw propeller airfoil.