AEROACOLTSTIC ANALYSIS OF MUFFLERS WITH FLOW REVERSALS.
Abstract
Mufflers with reversals of the direction of flow of exhaust gases are analysed. The transfer matrices relating the aeroacoustic variables across flow reversing elements arc derived. The hrad loss factors
at these elements required in the energy equations are determined experimentally. The noise reduction spectra of mufflers with flow reversals are determined experimentally and compared with the predicted results. The predicted results of noise reduction characteristics of experimental mufflers agree very well
with the measured values. That corroborates the validity of the derivation procedure and exactness or the transfer matrices, so obtained.
at these elements required in the energy equations are determined experimentally. The noise reduction spectra of mufflers with flow reversals are determined experimentally and compared with the predicted results. The predicted results of noise reduction characteristics of experimental mufflers agree very well
with the measured values. That corroborates the validity of the derivation procedure and exactness or the transfer matrices, so obtained.
Keywords
Exhaust mufflers, aeroflow acoustics, engine noise contral.
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