Application of laminar flow control to high-bypass-ratio turbofan engine nacelles
- High Technology Corp., Hampton, VA (United States) NASA, Langley Research Center, Hampton, VA (United States)
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-flow-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. 13 refs.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center
- OSTI ID:
- 7203968
- Report Number(s):
- CONF-9109281-; SAE-Paper-912114
- Resource Relation:
- Conference: Aerotech 91: Society of Automotive Engineers (SAE) conference, Long Beach, CA (United States), 23-26 Sep 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AIRCRAFT
FUEL CONSUMPTION
LAMINAR FLOW
BOUNDARY LAYERS
COMPUTER-AIDED DESIGN
CONTAINERS
DRAG
HYBRID SYSTEMS
PERFORMANCE
STABILITY
TURBOFAN ENGINES
DESIGN
ENERGY CONSUMPTION
ENGINES
EQUIPMENT
FLUID FLOW
LAYERS
MACHINERY
TURBOMACHINERY
320301* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Energy Sources