Application of Laminar Flow Control to High-Bypass-Ratio Turbofan Engine Nacelles 912114
Recently, the concept of the application of hybrid laminar flow to modern commercial transport aircraft was successfully flight tested on a Boeing 757 aircraft. In this limited demonstration, in which only part of the upper surface of the swept wing was designed for the attainment of laminar flow, significant local drag reduction was measured. This paper addresses the potential application of this technology to laminarize the external surface of large, modern turbofan engine nacelles which may comprise as much as 5-10 percent of the total wetted area of future commercial transports. A hybrid-laminar-fiow-control (HLFC) pressure distribution is specified and the corresponding nacelle geometry is computed utilizing a predictor/corrector design method. Linear stability calculations are conducted to provide predictions of the extent of the laminar boundary layer. Performance studies are presented to determine potential benefits in terms of reduced fuel consumption.
Citation: Wie, Y., Collier, F., and Wagner, R., "Application of Laminar Flow Control to High-Bypass-Ratio Turbofan Engine Nacelles," SAE Technical Paper 912114, 1991, https://doi.org/10.4271/912114. Download Citation
Author(s):
Y. S. Wie, F. S. Collier, R. D. Wagner
Affiliated:
High Technology Corporation, NASA Langley Research Center
Pages: 12
Event:
Aerospace Technology Conference and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Turbofan engines
Fuel consumption
Flight tests
Aircraft
Drag
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