摘要
本文研究了Rjike管热声振荡的非线性效应，指出了引起非线性效应的两个因素，即热声相互作用的非线性和声波在管子末端的非线性辐射声阻,并通过计算声波振幅的增长率和实验分析声波的频谱，发现非线性效应限制了管内声波振幅的增长，并且导致了二次及高阶谐波的产生。
Abstract: In this paper, the nonlinear effect of Rijke thermoacoustic oscillation is studied. Two reasons which cause the nonlinear effect are given. They are the nonlinear thermoacoustic mutual relation and the nonlinear radiating impedance of sound wave at end of the Rijke tube. The results of nonlinear effect are also directed by calculating the growth rate of sound wave in the tube and experimental analysis of the spectrum of sound wave. It's found that nonlinear effect stabilizes the sound wave and cause the production of high harmonics.
出处
《声学学报》
EI
CSCD
北大核心
1997年第3期249-254,共6页
Acta Acustica
