A continuous adjoint method for unstructured grids

Antony Jameson, Sriram, Luigi Martinelli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

Adjoint based shape optimization methods have proven to be computationally efficient for aerodynamic problems. The majority of the studies on adjoint methods have used structured grids to discretize the computational domain. Due to the potential advantages of unstructured grids for complex configurations, in this study we have developed and validated a continuous adjoint formulation for unstructured grids. The hurdles posed in the computation of the gradient for unstructured grids are resolved by using a reduced gradient formulation. Methods to impose thickness constraints on unstructured grids are also discussed. Results for two and three dimensional simulations of airfoils and wings in transonic flow are used to validate the design procedure. Finally, the design procedure is applied to redesign the shape of a transonic business jet configuration, and we were able to reduce the drag of the aircraft from 235 to 216 counts resulting in a shock free wing.

Original languageEnglish (US)
Title of host publication16th AIAA Computational Fluid Dynamics Conference
StatePublished - Dec 1 2003
Event16th AIAA Computational Fluid Dynamics Conference 2003 - Orlando, FL, United States
Duration: Jun 23 2003Jun 26 2003

Publication series

Name16th AIAA Computational Fluid Dynamics Conference

Other

Other16th AIAA Computational Fluid Dynamics Conference 2003
CountryUnited States
CityOrlando, FL
Period6/23/036/26/03

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Engineering (miscellaneous)
  • Aerospace Engineering
  • Automotive Engineering
  • Mechanical Engineering

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    Jameson, A., Sriram, & Martinelli, L. (2003). A continuous adjoint method for unstructured grids. In 16th AIAA Computational Fluid Dynamics Conference (16th AIAA Computational Fluid Dynamics Conference).