翼型阻力计算方法的数值模拟研究

翼型阻力是评定翼型气动特性的重要气动参数之一，翼型测压实验时主要用动量法测量阻力，也就是根据尾迹区某截面的动量损失来计算翼型阻力。本文首先用数值模拟方法获得翼型流场全部信息，然后分别用翼面压力、粘性力积分和尾迹动量损失积分两种方法获得阻力，并对它们的结果进行比较分析，以确定在使用尾迹积分法计算阻力系数时的最佳积分截面和尾迹排架的最佳安装位置。

Numerical Simulation Study of the Airfoil Drag Prediction Methods

This paper investigates the methods to calculate airfoil drag including the method of airfoil surface integration of pressure and shear stress and the method of integration of momentum loss in a wake cross section. The flow field solution is provided by the numerical simulation of the flow around the airfoil flying in the atmosphere or the airfoil installed in the wind tunnel test section. The drag coefficients obtained by the two methods are compared and those obtained by integrating in different wake cross sections are also compared. The optimal cross sections are found for wake loss integration to obtain drag both in the free flight case and the wind tunnel test case, i.e., the optimal position to install wake rake is obtained.