摘要
在自行设计建造的消声器静态试验台上,对某型消声器在有、无气流两种情况下进行了试验研究,并根据试验进行了消声器内部流场CFD仿真研究。研究表明,气流在一定的速度范围内对消声器消声量影响很小,当超出范围时消声量随气流速度的增大而减小,同时消声器压力损失也加大。说明流速和内部结构是影响消声器性能的重要因素。
The experimental study on the acoustical performance of a muffler was carried out under the two conditions of having and having no airflow on the self-built muffler static test platform, and subsequently the flow field inside the muffler was simulated and analyzed with CFD method according to the experiment. Studies show that the noise elimination quantity is rarely affected in a certain airflow speed ranges and but will decrease with the increase of airflow velocity beyond some ranges, it is also found that the muffler pressure loss will increase when airflow velocity is beyond ranges. Accordingly, the airflow velocity and internal structure of muffler are important elements of influencing muffler performance.
出处
《车用发动机》
北大核心
2007年第5期31-34,共4页
Vehicle Engine
关键词
排气消声器
数值模拟
噪声
流场
exhaust muffler
numerical simulation
noise
flow field
