基于阻力分解策略的翼型阻力计算方法研究

研究并应用了基于翼型阻力分解策略的中场积分计算阻力的方法。中场积分方法是近年来提出的一种新的计算阻力的方法,方法将流场分为三个不同的区域：波阻区、型阻区、数值耗散区,通过对不同区域进行积分将阻力分解为波阻、型阻、数值耗散阻力。计算结果表明中场积分方法与传统的表面积分方法和远场积分方法相比,不仅可以将阻力分解成不同部分以便于进一步分析阻力产生机理,而且在计算中对网格量的要求较低,即使在网格量较小的情况下也能得到较精确的结果。

Mid-field Drag Prediction Method Based on Airfoil Drag Decomposition

In this paper,we do some research on Mid-field drag prediction method which is based on airfoil drag decomposition method.Mid-field drag prediction method is a new method,and this method can decompose total drag into drag components such as wave,profile,induced and spurious drag which is due to the effects of the numerical diffusion and error.The computation results show that Mid-field drag prediction method has two advantages compared to Near-field drag prediction method and Far-field drag prediction method:this method can decompose total drag into drag components which can be used to analysis the drag generation mechanism,also this method needs less grids.