本文首先回顾了CFD模拟中可能会产生的各种误差,然后着重研究在数值模拟的过程中由于网格尺度所产生的误差。采用Richardson外推法建立了估算网格误差的方法和准则,并以NACA4412翼型为例详细介绍了如何应用误差估算方法及其对CFD模拟结果的修正。
All possible errors in CFD simulation are first reviewed. The errors caused from gird scale in a numerical simulation process are mainly studied. Methods and guide lines for estimating the numerical errors by using the Richardson extrapolation approach are set up. Taking NACA4412 airfoil as an example, it is presented that how one can use this method for the error estimation and for the correction of simulation results got with CFD.