arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.09600nlin.AO
收藏

耦合热声振荡器的动力学状态与分岔

Dynamical States and Bifurcations in Coupled Thermoacoustic Oscillators

Sneha Srikanth, Samadhan A. Pawar, Krishna Manoj, R. I. Sujith

摘要:

耦合自持振子中出现的丰富的动力学现象,主要是同步和振幅死亡,在科学和工程的许多领域引起了相当大的兴趣。在这里,我们提出了一个全面的理论研究,这些精致的现象在降阶模型的两个耦合Rijke管振荡器,这是典型的热声振荡器的表现。我们通过改变系统参数(如振子的非耦合振幅和固有频率)和耦合参数(如耦合强度和耦合延迟)来描述两个相同和不同振子的动力学行为。本模型捕捉所有的动力学现象-即同步,相位翻转分岔,振幅死亡,部分振幅死亡-在耦合Rijke管的实验中观察到的。通过进行数值模拟和推导近似解析解,我们系统地破译了上述现象的条件和分叉。这项研究提供的见解可以用来了解燃气轮机燃烧室中的多个罐之间的相互作用,并制定合适的控制策略,以避免不必要的热声振荡。

英文摘要:

The emergence of rich dynamical phenomena in coupled self-sustained oscillators, primarily synchronization and amplitude death, has attracted considerable interest in several fields of science and engineering. Here, we present a comprehensive theoretical study on the manifestation of these exquisite phenomena in a reduced-order model of two coupled Rijke tube oscillators, which are prototypical thermoacoustic oscillators. We characterize the dynamical behaviors of two such identical and non-identical oscillators by varying both system parameters (such as the uncoupled amplitudes and the natural frequencies of the oscillators) and coupling parameters (such as coupling strength and coupling delay). The present model captures all the dynamical phenomena -- namely synchronization, phase-flip bifurcation, amplitude death, and partial amplitude death -- observed previously in experiments on coupled Rijke tubes. By performing numerical simulations and deriving approximate analytical solutions, we systematically decipher the conditions and the bifurcations underlying the aforementioned phenomena. The insights provided by this study can be used to understand the interactions between multiple cans in gas turbines combustors and develop suitable control strategies to avert undesirable thermoacoustic oscillations in them.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑