非结构网格多段翼型绕流Euler及N—S方程数值模拟

描述二维非结构无粘网格和粘性网格的生成方法，对二维翼型绕流进行了Euler及N－S方程数值模拟，运用推进面方法，生成无粘网格，进一步结合推进层方法，生成粘性网格，应用中心有限体积法，采用B－L代数湍流模型，完成了对多段翼型流场的Euler方程和N－S方程的数值模拟计算，计算与实验结果对比表明，所采用的网格生成技术及流场计算方法是正确、有效的。

Numerical Analysis of Multi-Element Airfoil Using Unstructured Grid and Euler and N-S Equations

Unstructured grid is superior to structured grid in three aspects: automated grid generation, good grid adaptability, and easy control of grid generation. Generation of unstructured grid is divided into two parts: on the airfoil surface, advancing layer method discussed in subsection 1.2 is used; for the far field, advancing front method discussed in subsection 1.1 is used. In subsection 1.4 we discuss how to construct a turbulence reference grid needed when B L algebraic turbulence model is used in calculations solving N S equations. We solve Euler equations with a conventional algorithm, which includes cell centred finite volume method and Runge Kutta time stepping scheme. We complete the solution of N S equations by introducing the B L algebraic turbulence model and using the turbulence reference grid. We generate computational grids as shown in Figs.2 through 7 for two element and three element airfoils. Our calculated results are in good agreement with test data as shown in Figs.7 through 10 and show preliminarily that our method of unstructured grid generation and flow field numerical simulation is feasible.