Computation of Broadband Noise Radiated by a Ducted Fan in an Uniform Flow

Topics:
Aerospace and Defense
Tags:
Broadband,
Broadband Internet,
Computation,
Network Technology,
Networking,
Noise,
ONERA,
Telecommunications
Source:
ONERA

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Overview: Prediction of ducted-fan broadband noise has become a challenge for reducing aircraft turbofan noise because it dominates overall sound levels at subsonic rotation tip speeds. This paper discusses the equations established in a previous work for a uniform flow inside the duct, the free medium being at rest (case of static tests). Free-field computation is extended to a medium in translation which better simulates flight conditions (the same velocity being taken in all the space).

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Format: PDF | Size: 828KB | Date: Aug 2003 | Pages: 10

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