临近空间螺旋桨气动性能数值分析

在实验条件不成熟和计算性能不够好的情况下,提出了一种研究螺旋桨气动性能的方法.首先对叶素周围的流场进行数值模拟,分析叶素的气动性能并得出叶素升阻系数,然后差值得到叶素升阻系数沿桨径的连续分布,再利用叶素理论对螺旋桨的整体气动性能进行分析.研究表明,所提出的研究方法不仅可以对叶素周围流场进行详细的分析,还能够较好地分析螺...

Study of propeller aerodynamic characteristics in near space

A numerical method has been found to investigate the propeller aerodynamic characteristics in near space when the laboratorial conditions are not sufficient and the computational power is not good enough.The first step of this method is numerical simulating the flow field around blade element,analyzes the aerodynamic characteristics of blade element,and gets lift coefficients and drag coefficients of different blade elements.Second step of this method is to get the continuous distributing of lift coefficients and drag coefficients along the blade by the cubic spline interpolation method,then the propeller aerodynamic characteristics will be analyzed by the blade element theory.The results show that the flow field around blade element could be studied in detail by the method sparkplugging in this paper,and the propeller aerodynamic characteristics could also be analyzed in same degree.For the propeller investigated in this paper,the separate phenomena will take place around the foreside segment of the blade instead of the top end of the blade.