航空学报 > 2002, Vol. 23 Issue (6): 564-567

用非结构直角网格和欧拉方程计算飞机绕流

黄明恪   

  1. 南京航空航天大学空气动力学系 江苏南京 210016
  • 收稿日期:2001-10-18 修回日期:2002-03-12 出版日期:2002-12-25 发布日期:2002-12-25

COMPUTATION OF THE FLOW PAST AIRCRAFT USING UNSTRUCTURED CARTESIAN GRID AND EULER EQUATIONS

HUANG Ming-ke   

  1. Dept. of Aerodynamics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2001-10-18 Revised:2002-03-12 Online:2002-12-25 Published:2002-12-25

摘要:

采用八叉树结构 ,生成复杂外形绕流计算的非结构直角网格。物面附近用投影方法 ,使网格贴体。并将Jameson的有限体积法推广用于这种网格的欧拉方程计算。对歼击机模型的绕流计算表明 ,网格生成的机时花费很少 ,总体质量好 ,因而欧拉方程解算的收敛质量也好。

关键词: 直角网格, 欧拉方程, 有限体积法

Abstract:

Unstructured Cartesian grid for complex geometries is generated based on Octree data structure. The projection method is applied near the body surface to make the grid bodyfitted. Jameson's finite volume method is extended to such a grid to solve the Euler equations. The computation of the flow past a fighter model shows a reduced CPU time for the grid generation, and a good convergence level reached for the flow computation due to the quality of the computational grids.

Key words: Cartesian grid, Euler equations, finite volume method