Simulation and experiment on acoustic characteristics of out-of-phase and split-stream-rushing muffler for diesel engine

作者：Su He; Wu Pei^*; Zhao Zhi Wen; Zhang Yong An; Ma Yan Hua

来源：Chinese Internal Combustion Engine Engineering, 2015, 36(4): 66-70.

DOI：10.13949/j.cnki.nrjgc.2015.04.013

• Acoustic characteristic
• AND splits
• Exhaust mufflers
• IC engines
• Simulation analysis

A new noise control method was proposed to reduce the dominant components of exhaust noise by using out-of-phase acoustic cancellation and to reduce the regeneration noise from diesel muffler by using split-stream rushing. To this end, a single-cylinder diesel engine CG25 was chosen for the simulation and experimental analysis of the acoustic characteristics for a new muffler. The results show that the noise reduction of the new out-of-phase and split-stream-rushing muffler is noticeable around the frequency as low as 110 Hz and between 300~500 Hz. In addition, the insertion loss of the new muffler is almost twice as that of the original muffler at the rated speed of 2200 r/min, this proves the correctness of the new noise reduction method and the simulation analysis.

• 出版日期2015