Efficiency improvement in sensitivity evaluation in aerodynamic shape optimization


Eyi S. , Lee K.

14th Applied Aerodynamics Conference, 1996, Louisiana, United States Of America, 17 - 20 June 1996, pp.1022-1031 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • Doi Number: 10.2514/6.1996-2506
  • City: Louisiana
  • Country: United States Of America
  • Page Numbers: pp.1022-1031

Abstract

© 1996 by the American Institute of Aeronautics and Astronautics, Inc. All rights resewed.The paper presents two methods that improve the accuracy and reduce the computational cost in evaluating finite-difference sensitivities for aerodynamic shape optimization. The first method is a modified finite-difference approach that improves the accuracy of sensitivities at a reduced cost using an improved iteration strategy. The second method finds the optimum perturbation size based on an asymptotic error formula. These two methods were implemented and demonstrated for inverse design optimizations, exhibiting consistently better performance compared to traditional finite-difference methods.