Understanding of nonlinear dynamics of natural engines and its application

本研究的目的是通过实验来了解热致不稳定振荡（热声振荡）的非线性动力学。当两个热声混沌振子相互连接时，在流体系统中首次观察到了混沌同步现象。另外，当两个热声振荡器通过针阀连接时，观察到当频率失谐大时振荡停止。当频率失谐量为零时，需要增加一个连接管来消除振荡。实验推导出的演化方程能够描述分岔点附近的振荡动力学。

Objective of this study was to experimentally understand the nonlinear dynamics of thermally induced unstable oscillations known as thermoacoustic oscillations. When two thermoacoustic chaos oscillators are connected each other, chaos synchronization was observed for the first time in fluid system. Also when two thermoacoustic oscillators are connected via a needle valve, the oscillation was observed to stop when the frequency detuning was large. When the frequency detuning was zero, it was necessary to add a connecting tube to annihilate the oscillation. The evolution equation was experimentally derived which was able to describe oscillatory dynamics near the bifurcation point.