Research on Sound Muffling Mechanism of the Reverse Hedge Internal Combustion Engine Muffler Unit
In order to solve the problems of traditional exhaust muffler with poor characteristics of noise reduction in low-frequency domain,proposes a new concept of noise elimination,which uses the acoustic phase offset to reduce the low frequency components that plays a dominant position,and uses the principle,reducing air opposition velocity to reduce flow noise regeneration,to reduce the other frequency band noise.And establishes a physical model for this new muffler unit,and reveals the sound muffling mechanism by using the acoustic radiation theory.Taking CG25 type single cylinder diesel engine for prototype,products a new principle of muffler and makes the detailed spectrum analysis.