Title: Recent progress in drag prediction and reduction for civil transport aircraft at ONERA
Abstract: The paper gives a survey of recent work at ONERA in the fields of drag prediction and drag reduction. The far-field drag analysis has been extended to Euler codes. This approach enables physical drag sources to be identified and artificial (spurious) drag to be eliminated. Progress achieved in drag prediction of inviscid flow is illustrated through appropriate examples of drag analysis on an airfoil, a wing and a wing-body configuration. A first application of the far-field analysis to Navier-Stokes codes is also reported. First results obtained for an airfoil are promising. As far as drag reduction is concerned, the main efforts are devoted to the evaluation of advanced concepts tackling the main drag sources of a civil transport aircraft which are wave drag, lift induced drag and skin friction drag. The first case presented deals with wave drag reduction of an airfoil through local wall deformation. Significant improvements predicted after design modification have been confirmed by an experimental verification. Then, the potential to reduce lift induced drag by a careful design of a particular wing tip device is discussed. Finally, progress in hybrid laminar flow investigations is demonstrated.
Publication Year: 1998
Publication Date: 1998-01-12
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 40
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