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Aerodynamic and acoustic performance of a contracting cowl high throat Mach number inlet installed on NASA Quiet Engine 'C'The purpose of this experimental program was to evaluate the approach and takeoff performance of a contracting cowl variable geometry design inlet installed on a high-bypass-ratio turbofan engine. The design was finalized after consideration of aerodynamic, acoustic, and mechanical factors which would lead to a viable flight-worthy inlet concept. The aerodynamic results are presented in terms of inlet recovery and distortion parameter as functions of throat Mach number, and acoustic results in terms of Perceived Noise Level. The contracting cowl high throat Mach number inlet is shown to be an attractive means to reduce forward radiated noise from a high bypass ratio turbofan engine.
Document ID
19760055093
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bloomer, H. E.
(NASA Lewis Research Center Cleveland, OH, United States)
Schaefer, J. W.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
July 1, 1976
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 76-540
Meeting Information
Meeting: Aero-Acoustics Conference
Location: Palo Alto, CA
Start Date: July 20, 1976
End Date: July 23, 1976
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
76A38059
Distribution Limits
Public
Copyright
Other

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