Coherence resonance in a thermoacoustic system.
Coherence resonance in a thermoacoustic system.
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DOI：
10.1103/physreve.92.042909
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发表时间：
2015-10
期刊：
影响因子：
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通讯作者：
Lipika Kabiraj;Richard Steinert;Aditya Saurabh;C. Paschereit
中科院分区：
文献类型：
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作者：
Lipika Kabiraj;Richard Steinert;Aditya Saurabh;C. Paschereit
实验研究了一个典型热声系统的噪声诱导动力学行为，该系统从亚临界Hopf分岔到极限环振荡。该研究在给药前进行。在燃烧室中的压力振荡和火焰的热释放率的波动的特性的分析-热声耦合中涉及的两个物理实体-在噪声水平的增加表明的霍普夫分叉的前兆。这些前兆被进一步确定为相干共振的结果。
We experimentally investigated the noise-induced dynamics of a prototypical thermoacoustic system undergoing a subcritical Hopf bifurcation to limit cycle oscillations. The study was performed prior to the bistable regime. Analysis of the characteristics of pressure oscillations in the combustor and fluctuations in the heat release rate from the flame-the two physical entities involved in thermoacoustic coupling-at increasing levels of noise indicated precursors to the Hopf bifurcation. These precursors were further identified to be a result of coherence resonance.