用频响分析法研究二冲程发动机排气管系的设计问题

Investigation on Designing of Exhaust Pipe for Two-Stroke Engine Using the Method of Frequency Analysis

本文从带有锥形管的排气管系中气体波动方程出发,通过付里叶变换在频域中分析了排气管系中压力脉动的频响特性,探讨了排气管系的频响特性与发动机排气速度激发频谱之间的关系。得出了一些在时域中无法得到的信息,为改善排气管系的设计、计算提供了一种新的方法。

The gas wave equation in exhaust pipe with the taper pipe was established in this paper. The frequency response of gas pressure pulsation in exhaust pipe was analysised by Fourie transform in the frequency domain, and the relationships between the frequency response of exhaust pipe arid exciting frequency spectrum cf exhaust gas speed were investigated. Some information which couldn't be obtained in the time domain was obtained in the frequency domain. A new method for designing exhaust pipe of two-stroke engine was developed.