Interference effects of very high bypass ratio nacelle installations on a low-wing transportA twin-engine, low-wing transport model, with a supercritical wing designed for a cruise Mach number of 0.77 and a lift coefficient of 0.55 was tested in the 16-Foot Transonic Tunnel at NASA Langley Research Center. The purpose of this test was to compare the wing/nacelle interference effects of superfans (BPR 18) with the interference effects of advanced turbofans (BPR 6). Flow-through nacelles were used. Forces and moments on the complete model were measured using a strain gage balance, and extensive surface static pressure measurements were made on the model's wing, nacelles, and pylons. Results of the investigation indicate that superfan nacelles can be installed with approximately the same drag penalty as conventional turbofan nacelles.
Document ID
19920033022
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ingraldi, Anthony M. (NASA Langley Research Center Hampton, VA, United States)
Re, Richard J. (NASA Langley Research Center Hampton, VA, United States)
Pendergraft, Odis C., Jr. (NASA Langley Research Center Hampton, VA, United States)
Kariya, Timmy T. (Vigyan Research Associates, Inc. Hampton, VA, United States)