Title: Numerical study of laminar nacelles: natural and hybrid laminar flow designs

Authors: O. Vermeersch; Xavier Bouteiller

Addresses: ONERA, The French Aerospace Lab, 2 Avenue Edouard Belin, 31055 Toulouse cedex 4, France ' Safran Aircelle, Route du Pont VIII, 76700 Gonfreville-l'Orcher, France

Abstract: This paper presents the numerical design of laminar nacelle engine. Both natural laminar flow and hybrid laminar flow control strategies that have been used to achieve laminar nacelle will be described. Numerical process is based on Euler computations coupled with boundary layer stability analyses. Influence of parameters acting on transition such as mean flow distortion (due to the pylon or wall suction), surface imperfections and wall heating will be analysed.

Keywords: laminar nacelles; laminar-turbulent transition; natural laminar flow; NLF; hybrid laminar flow; flow control; HLFC; surface imperfection; forward facing step; backward facing step; roughness; waviness; linear stability theory; Tollmien-Schlichting mode; cross-flow mode; suction; de-icing systems.

DOI: 10.1504/IJESMS.2014.063124

International Journal of Engineering Systems Modelling and Simulation, 2014 Vol.6 No.3/4, pp.191 - 204

Published online: 26 Jul 2014 *

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