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Calculation of Noise Reduction of Internal-Combustion Engine Air-Cleaner Based On CFD |
LIU Lian-yun,HAO Zhi-yong,ZHENG Xu |
Department of Power Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract A CFD approach was proposed to calculate the noise reduction of an air-cleaner for internal-combustion engine in the condition without mean flow. In the approach, a correction pipe was modeled to represent the real inlet boundary of the air-cleaner regarding the duct acoustic characteristics. The model and the approach were validated by comparing the calculated noise reduction with experimental data. Further, the noise reduction in the condition of mean flow was calculated. It was suggested that the mean flow with Mach number of 0.08 has no significant effect on noise reduction compared with that in the condition without mean flow. In addition the filter was modeled as porous zone, and the noise reduction of the cleaner with filter was calculated in the conditions with and without mean flow. The features of CFD model of the filter were investigated.
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Received: 06 November 2011
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