网格结构对Euler方程解的影响

 采用2种不同对接分区网格技术讨论了不同的网格结构对绕偏副翼的三维机翼流动的Euler方程解的影响.一种是部分不连续的网格(PDG);另一种是完全连续的网格(CCG),分别在PDG和CCG中采用Van Leer的矢通量分裂格式和Jameson的中心差分格式求解了Euler方程.算例表明,2种网格各有其优缺点,且都能得到有用的结果,但为了高效地取得更好的计算结果,必须根据流动和几何外形选取恰当的计算网格.

Influence of Grid Structure on the Euler Solution

Using two types of patched grids, the influence of grid structure on the Euler solution of the flow around a wing with aileron deflection is discussed. One type is a partially discontinuous grid (PDG) and the other is a completely continuous grid (CCG). Van Leer's flux vector splitting scheme and Jameson's central difference scheme are used respectively in PDG and CCG as the numerical methods to solve the Euler equations. Numerical results show that the two grids, CCG and PDG, have their own advantages and disadvantages respectively. Even though the useful results can be obtained in both grids,a suitable grid structure must be chosen depending on the flow and geometry to obtain better results efficiently.