B. Humphreys, P. Meyer

Incentives to reduce nacelle drag are constantly increasing. Legislation to reduce noise is currently the primary driver, followed by non-legislative targets to limit the emission of gases that damage the Earth?s atmosphere, leading to changes in the global climate, and of course a desire to reduce fuel costs. The ALTTA Hybrid Laminar Flow (HLF) Nacelle work created and used a multi-variable optimisation (MVO) tool to produce an optimised solution, for applying HLF to the nacelle outer surface for the A340/Rolls-Royce Trent 500 power plant. The result is a design showing a sfc improvement in the range 0.6% to 0.9%. The work was a logical development from previous nacelle studies, such as made in ELFIN2, LARA and HYLDA, and produced a simple design using passive suction that overcame the risks and disincentives associated with previous designs. As well as producing a solution for the specific drag increase problems associated with noise reduction, the ALTTA HLF Nacelle concept is seen as an ideal ingress route for the wider application of HLF technology to commercial jet transports.

CEAS/KATnet Conference on Key Aerodynamic Technologies, Bremen, 2005

Conference Paper

englisch

21,0 x 29,7 cm, 8 Seiten

DGLR-Bericht, 2005, 2005-07, CEAS/KATnet Conference on Key Aerodynamic Technologies - Proceedings; S.1-8; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

in getr. Zählung;

aerodynamics, drag

Bibliothek

2005