High-lift design optimization using Navier-Stokes equations

Eyi S., Lee K., Rogers S., Kwak D.

JOURNAL OF AIRCRAFT, vol.33, no.3, pp.499-504, 1996 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 3
  • Publication Date: 1996
  • Doi Number: 10.2514/3.46972
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.499-504
  • Middle East Technical University Affiliated: No


This article presents a design optimization method for maximizing lift without increasing the drag of multielement airfoils at takeoff and landing configurations. It uses an incompressible Navier-Stokes dow solver (INS2D), a chimera overlaid grid system (PEGSUS), and a constrained numerical optimizer (DOT). Aerodynamic sensitivity derivatives are obtained using finite differencing. The method is first validated with single-clement airfoil designs and then applied to three-element airfoil designs. Reliable design results are obtained at reasonable costs. Results demonstrate that numerical optimization fan be an attractive design tool for the development of multielement high-lift systems.