The measurement of source strength and impedance on a diesel engine

Yitian Zhang, David W. Herrin, Jiawei Liu, Gayatri Kadlaskar

Research output: Contribution to conferencePaperpeer-review

Abstract

The knowledge of strength and internal impedance of the sound source is necessary to predict the overall acoustic performance of an exhaust or intake system. Different models have been suggested for measuring the source strength and impedance. In this paper, circuit analogy and wave decomposition models are compared and applied to acoustically characterize a diesel engine. To validate the accuracy of both models and measurement, the sound pressure in the exhaust is predicted from the measured source strength and impedance and compared with actual measurement. Good comparison between the prediction and measurement is observed for both models, especially at the first few harmonics of the firing frequency.

Original languageEnglish
StatePublished - 2015
Event44th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2015 - San Francisco, United States
Duration: Aug 9 2015Aug 12 2015

Conference

Conference44th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2015
Country/TerritoryUnited States
CitySan Francisco
Period8/9/158/12/15

Bibliographical note

Publisher Copyright:
© 2015 by ASME.

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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