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Diagnostic calculations of airframe-radiated noiseMethods of calculating airframe noise due to the following components are presented: wings and stabilizers, flaps, landing gear 'self-noise', landing gear bay (wheel well) oscillations, separated flow interaction with edges of cavities, and doors associated with gear deployment. The predominant source mechanisms were dipole-like in nature, being related to the local fluctuating aerodynamic forces on struts, airfoil edges, cavity edges, etc. Available data are converted into semiempirical prediction methods to enable a tentative rank ordering of noise sources. A sample application of these prediction procedures is carried out for a typical CTOL passenger jet using actual aircraft parameters, where available.
Document ID
19750041683
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hayden, R. E.
Kadman, Y.
Bliss, D. B.
Africk, S. A.
(Bolt Beranek and Newman, Inc. Cambridge, Mass., United States)
Date Acquired
August 8, 2013
Publication Date
March 1, 1975
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
AIAA PAPER 75-485
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aero-Acoustics Conference
Location: Hampton, VA
Start Date: March 24, 1975
End Date: March 26, 1975
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
75A25755
Distribution Limits
Public
Copyright
Other

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