Artigo Revisado por pares

The radiation of sound from an engine exhaust

1970; Elsevier BV; Volume: 13; Issue: 4 Linguagem: Inglês

10.1016/s0022-460x(70)80044-x

ISSN

1095-8568

Autores

R.J. Alfredson, P.O.A.L. Davies,

Tópico(s)

Acoustic Wave Phenomena Research

Resumo

This paper reports the findings of the first stage of a systematic investigation of the processes occurring in an internal combustion engine exhaust system. It deals initially with finite amplitude pressure wave effects. The boundary conditions imposed on the fluctuating pressure in the exhaust system by the exhaust outlet are then discussed on the basis of measurements made using the tail pipe as an impedance tube. The nett energy flux in the tail pipe including the effect of mean flow is calculated and subsequently related to the level of the sound radiated by the engine exhaust.

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