Experimental Investigations on the Interplay between a thermoacoustic oscillator and an external acoustic driver with different waveforms

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-03-18 DOI:10.1016/j.apacoust.2025.110678

Shancheng Tao , Liu Liu , Zhaoyu Li , Lihua Tang , Zhibin Yu , Geng Chen

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引用次数: 0

Abstract

Recent studies have reported on the various nonlinear behaviors (e.g., synchronization) resulting from the mutual interaction between a thermoacoustic oscillator and an external acoustic driver producing sinusoidal waves. This work extends previous research by experimentally investigating the dynamic behavior of a thermoacoustic oscillator subjected to external disturbances with different waveforms including triangular and irregular waves. The experimental data are analyzed using various signal processing techniques such as Fast Fourier Transform, wavelet transform, and phase space trajectories. Results reveal that apart from sinusoidal waves, both triangular and irregular waves can be utilized to synchronize the thermoacoustic oscillator. When synchronization occurs, the oscillator will transit from initial periodic oscillations at the natural frequency to final periodic oscillations at the driving frequency. The acoustic pressure resembles the external disturbance at the open end (e.g., triangular waves) but shifts towards sinusoidal waves when approaching the closed end. It is found that synchronization can happen if the dominant frequency of the external disturbance closely aligns with the natural frequency of the oscillator, even in the presence of harmonic components. This study provides an experimental framework for investigating the dynamic behavior of thermoacoustic oscillators under external disturbances, enhancing our understanding of synchronization phenomena in thermoacoustic devices.

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.