This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
INSTALLATION AERODYNAMICS OF WING-MOUNTED, SINGLE-ROTATION PROPFANS
Annotation ability available
Sector:
Language:
English
Abstract
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.
Authors
Citation
Bencze, D., Smith, R., and Levin, A., "INSTALLATION AERODYNAMICS OF WING-MOUNTED, SINGLE-ROTATION PROPFANS," SAE Technical Paper 861719, 1986, https://doi.org/10.4271/861719.Also In
References
- DeMeis Richard Propfans Gear Up. Aerospace America October 1985
- Hopkins J. P. Wharton H. E. “Study of the Cost/Benefit Tradeoffs for Reducing the Energy Consumption of the Commercial Air Transportation System,” Lockheed-California Co. NASA CR-137927 1976
- Kraus E. F. Van Abkoude J. C. Cost/Benefit Tradeoffs for Reducing the Energy Consumption of the Commercial Air Transportation System, Vol I: Technical Analysis, Douglas Aircraft Co. NASA CR-137923 1976
- “Energy Consumption Characteristics of Transports Using the Prop-Fan Concept,” Boeing Commercial Airplane Co. NASA CR-137938 1976
- Levin Alan D. Smith Ronald C. Propfan Propulsion Integration Test Techniques AIAA Paper 82-0577 1982
- Levin Alan D. Smith Ronald C. Wood Richard D. “Aerodynamic and Propeller Performance Characteristics of Propfan-Powered, Semispan Model,” NASA TM-86705 1985
- Welge H. R. Crowder J. P. “Simulated Propeller Slipstream Effects on a Supercritical Wing,” Douglas Aircraft Co. NASA CR-152138 1978
- Mendoza J. P. “Interference Effects of Aircraft Components on the Local Blade Angle of Attack of a Wing-Mounted Propeller,” NASA TM-78587 June 1979
- Welge H. Robert Newhart Dan H. Dahlin John A. “Analysis of Mach Number 0.8 Turboprop Slipstream Wing/Nacelle Interactions,” Douglas Aircraft Co. NASA CR-166216 1981
- Kroo I. “Propeller-Wing Integration for Minimum Induced Loss,” AIAA Paper 84-2470 1984
- Vernon D. F. Page G. S. Welge H. R. “Propfan Experimental Data Analysis,” Douglas Aircraft Co., NASA CR-166582 August 1984