Propeller noise
Propeller noise
Propellers consist of a number of rotating blades and produce both tonal (or harmonic) and broadband noise. However, the former is by far the dominant source as it affects community noise, certification noise, and cabin noise. Hence, considerable effort has been expended advancing efficient methods of calculating it. Isolated propellers produce tones at multiples of the blade passing frequency, whereas counter-rotating propellers (CRPs) produce tones at frequencies corresponding to “sum and difference” frequencies of the blade passing frequencies of the front and rear rotors. In most instances, quadrupole noise can be neglected, and analytic expressions can be derived for predicting the noise from the remaining sources, which is due to the thickness of, and the loading on, the propeller blades. While the principles are well understood, good predictions depend on an accurate modeling of the flow fields.
propeller noise, counter-rotation propeller noise, advanced open rotor noise, tones, harmonic noise
9780470754405
3553-3564
Self, Rod H.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7
2010
Self, Rod H.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7
Self, Rod H.
(2010)
Propeller noise.
In,
Blockley, R. and Shyy, W.
(eds.)
Encyclopaedia of Aerospace Engineering.
Chichester, GB.
Wiley-Blackwell, .
(doi:10.1002/9780470686652.eae339).
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Book Section
Abstract
Propellers consist of a number of rotating blades and produce both tonal (or harmonic) and broadband noise. However, the former is by far the dominant source as it affects community noise, certification noise, and cabin noise. Hence, considerable effort has been expended advancing efficient methods of calculating it. Isolated propellers produce tones at multiples of the blade passing frequency, whereas counter-rotating propellers (CRPs) produce tones at frequencies corresponding to “sum and difference” frequencies of the blade passing frequencies of the front and rear rotors. In most instances, quadrupole noise can be neglected, and analytic expressions can be derived for predicting the noise from the remaining sources, which is due to the thickness of, and the loading on, the propeller blades. While the principles are well understood, good predictions depend on an accurate modeling of the flow fields.
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Published date: 2010
Keywords:
propeller noise, counter-rotation propeller noise, advanced open rotor noise, tones, harmonic noise
Identifiers
Local EPrints ID: 173019
URI: http://eprints.soton.ac.uk/id/eprint/173019
ISBN: 9780470754405
PURE UUID: 3036376e-adba-4661-9b49-b62cbcdbb560
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Date deposited: 01 Feb 2011 14:42
Last modified: 14 Mar 2024 02:30
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Contributors
Editor:
R. Blockley
Editor:
W. Shyy
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