Optimal design of acoustic performance for automotive air-cleaner

The research on optimal design of acoustic performance for air-cleaner was presented and evaluated in this paper using a numerical simulation method and experimental method. A modified measurement was proposed in the paper to solve the problem of air flow noise caused by the original measurement layout. The modified measurement was proved to produce good results. A new study on the acoustic effect of filter was also developed here and noise reduction (NR) of the air-cleaner was predicted based on the study using the numerical simulation method. Actual intake noise was then predicted using the simulation method. Side branch silencers were designed to improve the acoustic capacity of the air-cleaner. The result shows that the newly optimized air-cleaner has a much better performance of noise elimination when engine operating.