抗性消声器设计中高次简正波的影响

本文根据波导理论和四端网络参量原理具体推导了矩形扩张管道和圆形扩张管道的四端网络参量,并且实例分析了三种单级扩张消声器中高次简正波的作用。研究表明,高次简正波是影响中高频段抗性消声器插入损失理论估算精度的一个十分重要的因素;在实际设计中应该给予必要的重视。

The Effect of Higher Normal Model on Design of a Reactive Muffler

Based on the waveguide theory and the four-terminal network principle, we derived the four-pole parameters of two expanded tubes(rectangular and circular sections), and studied the practical effect of higher normal model on three sorts of reactive mufflers. The results show that the higher normal model is an important factor which can reduce the estimation error within the middle and high frequencies bands while the insertion loss of a reactive muffler is estimated.