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(1)气流噪声预防与控制排气噪声已成为公害,目前降低排气噪声的常用方法是在排气管出口处安装适当的消声器。近几年来人们从理论上和试验中已找到了降低排气噪声的新方法。该方法是用与原来噪声异相的一种同样噪声以抵消原来的噪声。降低进气噪声主要是减小进气管中气体随柴油机工作频率而产生的压力脉动带来的噪声,可采用加大进气管径和进气管壁厚的办法解决。
(1) Airflow Noise Prevention and Control Exhaust noise has become a public hazard. Currently, a common method of reducing exhaust noise is to install an appropriate silencer at the exhaust pipe outlet. In recent years, people have found a new way to reduce exhaust noise theoretically and experimentally. The method is to use the same noise out of phase with the original noise to offset the original noise. To reduce the intake noise is mainly to reduce the noise caused by the pressure pulsation caused by the gas in the intake pipe with the working frequency of the diesel engine. It can be solved by increasing the intake pipe diameter and the intake pipe wall thickness.