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This study developed a framework for the shape optimization of aerodynamics profiles using computational fluid dynamics (CFD) and genetic algorithms. A genetic algorithm code and a commercial CFD code were integrated to develop a CFD shape optimization tool. The results obtained demonstrated the effectiveness of the developed tool. The shape optimization of airfoils was studied using different strategies to demonstrate the capacity of this tool with different GA parameter combinations.

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SummaryThe products of the reaction of [RhCl (NBD)], (NBD = norbornadiene), with four equivalents tertiary phosphine and two equivalents of tin (11) bromide have been studied by Il9Sn-and ,IP-NMR. spectroscopy. The solution data suggest that halogen scrambling occurs during the preparation and results in a mixture of complexes containing SnBr,, SnClBr,, SnC1,Br and SnCl, ligands, and this is confirmed by independent synthesis of the SnC1, and SnBr, complexes. The metalmetal coupling constants, 1J(L19Sn,1"3Rh), vary from 452 to 580 Hz and are linearly related to: a) 6 ("'Sn) in the complexes [Rh(SnCl,Br(,_.))NBD (PEtPh,),] and b) the sum of the Pauling electronegativities for the halogens on tin.