计及气流和线性温度梯度的内燃机穿孔声管排气消声器研究

A Study on Perforated Acoustic Duct Exhaust Muffler of Internal Combustion Engines

摘要本文探讨了在考虑气流和线性温度梯度情况下声波在声管中的传播特性,推导了穿孔声管消声器声场传递函数,理论计算与试验结果的对比表明,文中所推导的理论公式与实际是一致的.

Sound propagation characteristics in perforated acoustic duct was studied considering a mean gas flow and a linear temperature gradient. Acoustic transfer function in acoustic field of perforated duct muffler was derived. Calculation results were compared with test data and good agreement was obtained.