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The development of CFD methods for rotor applicationsThe optimum design of the advancing helicopter rotor for high-speed forward flight always involves a tradeoff between transonic and stall limitations. However, the preoccupation of the rotor industry was primarily concerned with stall until well into the 1970s. This emphasis on stall resulted from the prevalent use of low-solidity rotors with rather outdated airfoil sections. The use of cambered airfoil sections and higher-solidity rotors substantially reduced stall and revealed the advancing transonic flow to be a more persistent limitation to high-speed rotor performance. Work in this area was spurred not only by operational necessity but also by the development of a tool for the prediction of these flows (the method of computational fluid dynamics). The development of computational fluid dynamics for these rotor problems was a major Army and NASA achievement. This work is now being extended to other rotor flow problems. The developments are outlined.
Document ID
19880007244
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Caradonna, F. X. (Army Aviation Systems Command Moffett Field, CA, United States)
Mccroskey, W. J. (Army Aviation Systems Command Moffett Field, CA, United States)
Date Acquired
September 5, 2013
Publication Date
February 1, 1988
Publication Information
Publication: NASA, Washington, NASA(Army Rotorcraft Technology. Volume 1: Aerodynamics, and Dynamics and Aeroelasticity
Subject Category
Aircraft Design, Testing And Performance
Accession Number
88N16627
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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