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Modelling and Simulation in Engineering
Volume 2011 (2011), Article ID 293078, 13 pages
http://dx.doi.org/10.1155/2011/293078
Research Article

Aerodynamic Optimization of an Over-the-Wing-Nacelle-Mount Configuration

Department of Aerospace Engineering, Tohoku University, Aoba 6-6-01, Sendai 980-8579, Japan

Received 14 November 2010; Revised 21 February 2011; Accepted 21 February 2011

Academic Editor: Guan Yeoh

Copyright © 2011 Daisuke Sasaki and Kazuhiro Nakahashi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An over-the-wing-nacelle-mount airplane configuration is known to prevent the noise propagation from jet engines toward ground. However, the configuration is assumed to have low aerodynamic efficiency due to the aerodynamic interference effect between a wing and a nacelle. In this paper, aerodynamic design optimization is conducted to improve aerodynamic efficiency to be equivalent to conventional under-the-wing-nacelle-mount configuration. The nacelle and wing geometry are modified to achieve high lift-to-drag ratio, and the optimal geometry is compared with a conventional configuration. Pylon shape is also modified to reduce aerodynamic interference effect. The final wing-fuselage-nacelle model is compared with the DLR F6 model to discuss the potential of Over-the-Wing-Nacelle-Mount geometry for an environmental-friendly future aircraft.