INSTALLATION AERODYNAMICS OF WING-MOUNTED, SINGLE-ROTATION PROPFANS NASA Ames Research Center, Moffett Field, California

Format:

Conference/Event

Author/Creator:

Bencze, Daniel P., author.

Conference Name:

SAE Aerospace Technology Conference and Exposition (1986-10-13 : Long Beach, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1986

Summary:

The installation of advanced (M = 0.8) turboprop propulsion systems on transport aircraft represents a challenging task to design engineers. The installation aerodynamics of wing-mounted, single-rotation (SR), tractor turboprop systems have been extensively investigated by NASA Ames using a large powered semi-span wind tunnel model. Two configurations have been studied: a straight under-the-wing (UTW) nacelle and a contoured over-the-wing (OTW) configuration. The installation characteristics of these two configurations are presented in terms of installed drag, wing pressure distributions, and surface oil flows. Through the use of wing leading-edge modifications, the installed drag of the UTW nacelle was reduced to less than isolated nacelle drag at the cruise condition of M = 0.8 with a wing CL of 0.5. At this condition, the favorable interference is attributed to the recovery of a portion of the swirl in the slipstream generated by the single rotation propeller. The OTW installation represented a much more difficult task. For the configuration tested, the installed drag was unacceptably high and demonstrated the sensitive nature of installing a nacelle/slipstream combination in the transonic flow regime

Notes:

Vendor supplied data

Publisher Number:

861719

Access Restriction:

Restricted for use by site license