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Journal of Aerospace Technology and Management

versão impressa ISSN 1984-9648versão On-line ISSN 2175-9146

Resumo

TRAPP, Luis Gustavo  e  ARGENTIERI, Henrique Gustavo. Evaluation of nacelle drag using Computational Fluid Dynamics. J. Aerosp. Technol. Manag. [online]. 2010, vol.2, n.2, pp.145-154. ISSN 2175-9146.  http://dx.doi.org/10.5028/jatm.2010.02026410.

Thrust and drag components must be defined and properly accounted in order to estimate aircraft performance, and this hard task is particularty essential for propulsion system where drag components are functions of engine operating conditions. The present work describes a numerical method used to calculate the drag in different nacelles, long and short ducted. Two- and three-dimensional calculations were performed, solving the Reynolds Averaged Navier-Stokes (RANS) equations with a commercial Computational Fluid Dynamics (CFD) code. It is then possible to obtain four drag components: wave, induced, viscous and spurious drag using a far-field formulation. An expression in terms of entropy variations was shown and drag for different nacelle geometries was estimated.

Palavras-chave : CFD; Drag; Engine; Nacelle; Propulsion.

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