Author: Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 112
Book Description
Installation Effects of Wing-mounted Turbofan Nacelle-pylons on a 1/17 Scale, Twin-engine, Low-wing Transport Model
Author: Installation Effects of Wing-Mounted Turbofan Nacelle-Pylons on a 1/17-Scale, Twin-Engine, Low-Wing Transport Model
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723181092
Category :
Languages : en
Pages : 108
Book Description
A twin-engine, low-wing transport model, with a supercritical wing of aspect ratio 10.8 designed for a cruise Mach number of 0.77 and a lift coefficient of 0.55, was tested in the Langley 16-Foot Transonic Tunnel. The purpose of this test was to compare the wing-nacelle interference effects of flow-through nacelles simulating superfan engines (very high bypass ratio (BPR is approx. = 18) turbofan engines) with the wing-nacelle interference effects of current-technology turbofans (BPR is approx. = 6). Forces and moments on the complete model were measured with a strain-gage balance, and extensive external static-pressure measurements (383 orifice locations) were made on the wing, nacelles, and pylons of the model. Data were taken at Mach numbers from 0.50 to 0.80 and at model angles of attack from -4 deg to 8 deg. Test results indicate that flow-through nacelles with a very high bypass ratio can be installed on a low-wing transport model with a lower installation drag penalty than for a conventional turbofan nacelle at a design cruise Mach number of 0.77 and lift coefficient of 0.55. Pendergraft, Odis C., Jr. and Ingraldi, Anthony M. and Re, Richard J. and Kariya, Timmy T. Langley Research Center AERODYNAMIC INTERFERENCE; BYPASS RATIO; INTERACTIONAL AERODYNAMICS; SUPERCRITICAL WINGS; TURBOFAN ENGINES; TURBOFANS; WING NACELLE CONFIGURATIONS; AERODYNAMIC COEFFICIENTS; ASPECT RATIO; COMPUTERIZED SIMULATION; STATIC PRESSURE; TRANSONIC WIND TUNNELS...
NASA Technical Paper
Author: NASA Technical Paper
Author: United States. National Aeronautics and Space AdministrationPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages :
Book Description
Scientific and Technical Aerospace Reports
Author: NASA Scientific and Technical Publications
Author: NASA Scientific and Technical Publications: A Catalog of Special Publications, Reference Publications, Conference Publications, and Technical Papers, 1991-1992
Author: Installation Effects of Wing-mounted Turbofan Nacelle-pylons on a 1/17-scale, Twin-engine, Low-wing Transport Model
Author: Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1308
Book Description
Monthly Catalogue, United States Public Documents
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1034
Book Description