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Design and performance of energy efficient propellers for Mach 0.8 cruiseThe increased emphasis on fuel conservation in the world has stimulated a series of studies of both conventional and unconventional propulsion systems for commercial aircraft. Preliminary results from these studies indicate that a fuel saving of 14 to 40 percent may be realized by the use of an advanced high-speed turboprop. This turboprop must be capable of high efficiency at Mach 0.8 cruise above 9.144 km altitude if it is to compete with turbofan powered commercial aircraft. Several advanced aerodynamic concepts were investigated in recent wind tunnel tests under NASA sponsorship on two propeller models. These concepts included aerodynamically integrated propeller/nacelles, area ruling, blade sweep, reduced blade thickness and power (disk) loadings several times higher than conventional designs. The aerodynamic design methodology for these models is discussed. In addition, some of the preliminary test results are presented which indicate that propeller net efficiencies near 80 percent were obtained for high disk loading propellers operating at Mach 0.8.
Document ID
Document Type
Conference Paper
Mikkelson, D. C.
(NASA Lewis Research Center Cleveland, OH, United States)
Blaha, B. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Mitchell, G. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Wikete, J. E.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1977
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
Meeting Information
Meeting: 1977 Natl. Business Aircraft Meeting and Exposition
Location: Wichita
Start Date: March 29, 1977
End Date: April 1, 1977
Sponsors: SAE Century 2
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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