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Observation of thermoacoustic chaotic oscillations in a looped tube
Rémi Delage1, Yusuke Takayama1, Hiroaki Hyodo1
1Department of Mechanical Engineering, Tohoku University, Sendai 980-8579, Japan.
Abstract:
This study presents experimental observations of chaotic thermoacoustic oscillations induced in a looped tube with respect to both temporal and spatial dimensions and compares them with those in a resonance tube system. The wave propagation directions observed in thermoacoustic systems showing periodic behaviors are confirmed in the chaotic case, from cold to hot sides in the stack in a looped system, and with reflections at the ends of a resonance tube system. Although both systems are similar in their route to chaos and correlation dimensions of the chaotic attractor, a recurrence visualization method reveals differences in the distribution of temporal patterns resulting from the mode competition between the natural frequencies of the systems.
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