Tone noise radiation from a ducted subsonic fan

Ramesh K. Agarwal

doi:10.4271/971459

Tone noise radiation from a ducted subsonic fan

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Abstract

An analytical/computational method of computing radiated noise from ducted rotor due to inflow distortion and turbulence is presented. Analytical investigations include an appropriate description of sources, the cut-off conditions imposed on the modal propagation of the pressure waves in the annular duct, and reflections at the upstream end of the duct. Far field sound pressure levels at blade passing frequency due to acoustic radiation from a small scale low speed fan are computed. Theoretical productions are in reasonable agreement with experimental measurements.

Original language	English
Journal	SAE Technical Papers
DOIs	https://doi.org/10.4271/971459
State	Published - 1997
Event	General, Corporate and Regional Aviation Meeting and Exposition - Wichita, KS, United States Duration: Apr 29 1997 → May 1 1997

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title = "Tone noise radiation from a ducted subsonic fan",

abstract = "An analytical/computational method of computing radiated noise from ducted rotor due to inflow distortion and turbulence is presented. Analytical investigations include an appropriate description of sources, the cut-off conditions imposed on the modal propagation of the pressure waves in the annular duct, and reflections at the upstream end of the duct. Far field sound pressure levels at blade passing frequency due to acoustic radiation from a small scale low speed fan are computed. Theoretical productions are in reasonable agreement with experimental measurements.",

author = "Agarwal, {Ramesh K.}",

year = "1997",

doi = "10.4271/971459",

language = "English",

journal = "SAE Technical Papers",

issn = "0148-7191",

note = "General, Corporate and Regional Aviation Meeting and Exposition ; Conference date: 29-04-1997 Through 01-05-1997",

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AU - Agarwal, Ramesh K.

PY - 1997

Y1 - 1997

N2 - An analytical/computational method of computing radiated noise from ducted rotor due to inflow distortion and turbulence is presented. Analytical investigations include an appropriate description of sources, the cut-off conditions imposed on the modal propagation of the pressure waves in the annular duct, and reflections at the upstream end of the duct. Far field sound pressure levels at blade passing frequency due to acoustic radiation from a small scale low speed fan are computed. Theoretical productions are in reasonable agreement with experimental measurements.

AB - An analytical/computational method of computing radiated noise from ducted rotor due to inflow distortion and turbulence is presented. Analytical investigations include an appropriate description of sources, the cut-off conditions imposed on the modal propagation of the pressure waves in the annular duct, and reflections at the upstream end of the duct. Far field sound pressure levels at blade passing frequency due to acoustic radiation from a small scale low speed fan are computed. Theoretical productions are in reasonable agreement with experimental measurements.

UR - http://www.scopus.com/inward/record.url?scp=85072452754&partnerID=8YFLogxK

U2 - 10.4271/971459

DO - 10.4271/971459

M3 - Conference article

AN - SCOPUS:85072452754

SN - 0148-7191

JO - SAE Technical Papers

JF - SAE Technical Papers

T2 - General, Corporate and Regional Aviation Meeting and Exposition

Y2 - 29 April 1997 through 1 May 1997

ER -

Tone noise radiation from a ducted subsonic fan

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