ENHANCEMENT OF A VISCOUS-INVISCID-INTERACTION AIRFOIL ANALYSIS CODE USING THE PARALLEL DIRECT SEARCH ALGORITHM

The coupling mechanism for an existing viscous-inviscid-interaction (V II) code, developed for the analysis of two-dimensional, turbulent, at tached flow around airfoils, is enhanced using the parallel direct sea rch (PDS) optimization algorithm. It is demonstrated that this paralle l processing implemented optimization scheme leads to faster convergen ce of the VII code, and therefore, requires less computational time wh en the number of optimization (or design) variables is low, and a mode rate number of processors are available. As the number of design varia bles increases, more processors are required to maintain this advantag e. Results are presented for the NACA-0012 and the RAE-2822 airfoils. The quality of the results obtained is satisfactory and confirms that the enhanced VII code can be an acceptable alternative to reduced Navi er-Stokes solvers as an airfoil analysis tool.