计算物理 ›› 1993, Vol. 10 ›› Issue (2): 185-190.

• 论文 • 上一篇    下一篇

非定常边界层方程的微分求积解法

唐登斌, 钱岭, 舒昌   

  1. 南京航空学院, 210016
  • 收稿日期:1991-12-18 修回日期:1992-09-30 出版日期:1993-06-25 发布日期:1993-06-25

SOLUTION OF UNSTEADY BOUNDARY LAYEREQUATIONS USING DIFFERENTIALQUADRATURE METHOD

Tang Dengbin, Qian Lin, Shu Chang   

  1. Nanjing Aeronautical Institute, 210016
  • Received:1991-12-18 Revised:1992-09-30 Online:1993-06-25 Published:1993-06-25

摘要: 对微分求积法的关键问题-加权系数的确定进行了研究。在Lagrange插值逼近理论的基础上发展了计算各加权系数的方法,克服了原方法对网格节点选取有严格限制的局限性,使之更适用于流体力学问题的研究。该方法用于求解非定常边界层方程的结果表明,仅用较少的网格点就能得到足够精度的数值解。

关键词: 微分求积, 非定常, 边界层

Abstract: The key technique to differential quadrature method, i. e. the determination of the weighting coefficients, is investigated in this paper. The method of computing different weighting coefficients is developed on the basis of Lagrangian interpolating approximation. This method overcomes the limitation of rigorous restriction in choice of the coordinates of grid points in original method1, and proves favoradble for studies of fluid mechanics problems. Resultes obtained for solving unsteady boundary layers show that the differential quadrature method can achieve rather high accurate solution by using only a few grid points.

Key words: differentinal quadrature, unsteady, boundary layer