propfan

(redirected from Open rotor)

propfan

[′präp‚fan]
(aerospace engineering)
An advanced turboprop with very thin, highly swept blades to reduce both compressibility losses and propeller noise during high-speed cruise.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

propfan

propfan
An advanced propeller for use at high Mach numbers. It has six to twelve blades. The sweeping of the blade delays the critical Mach number (Mcrit) and reduces the noise from the tips of the blades. The sweep also alters the phase of the noise generated by each radial section along the blade, causing a certain amount of interference. This results in noise reduction. A propfan can be used either as a pusher or a tractor.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Caption: A "super-tangential" cutting chamber with three-blade open rotor is optimal for bulky items such as bottles and containers.
Thomas, "Experimental studies of open rotor installation effects," in 3rd AIAA Atmospheric Space Environments Conference, Honolulu, Hawaii, June 2011AIAA Paper 2011-4047.
Kingan, "Advanced open rotor noise prediction," Aeronautical Journal, vol.
Contra-rotating open rotor engines that are quieter than today's turbofan engines could be developed in the near future, one of the top engineers at Rolls-Royce has predicted.
Kyprianidis, CONCEPTUAL DESIGN AND MISSION ANALYSIS FOR A GEARED TURBOFAN AND AN OPEN ROTOR CONFIGURATION, Proceedings of ASME Turbo Expo, Vancouver, Canada, June 6-10, 2011.
Washington, May 28 ( ANI ): Two aircraft engine concepts, geared turbofan and open rotor, can enable a significant reduction to aircraft fuel consumption.
Pratt and Rolls planned to hold an equal share in the venture, which was intended to study geared turbofan and open rotor technology along with other types of engine configurations.
New advances in open rotor engine technology can make airliners more fuel efficient, but still may face a noise problem.
In addition, the venture will collaborate on future studies for next generation propulsion systems, including advanced geared engines, open rotor technology and other advanced configurations, the companies said.
The cutting chamber has three or five knives on an open rotor with a scissor cutting action against the two standard bed knives.
Rolls-Royce (UK) and Safran (France), the two leaders, want to spend the package on research linked to the Open Rotor', a new engine design (see page 6) that will allow a considerable reduction in fuel consumption.