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Experimental study of exhaust noise generated by pulsating flow downstream of pipe end

โœ Scribed by Junji Higashiyama; Junjiro Iwamoto

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
563 KB
Volume
20
Category
Article
ISSN
0389-4304

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โœฆ Synopsis

An experimental study was carried out on the emission of exhaust noise from the open end of a pipe generated by the pulsating flow in the pipe.

The pressure histories along the pipe, the exhaust noise and the visualized flow field down-stream of the pipe end were obtained. The frequency characteristics of the exhaust noise were also examined, using Wigner distribution (WD).

The process where the compression wave grows into a shock wave, which is considered to be one of the causes for the generation of metallic noise from the exhaust pipe, was reproduced in the present experiment. An attempt was made to clarify the mechanism of noise generation by relating the wave phenomena in the pipe with the exhaust noise.

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