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Abstract
A tube, open at both ends and equipped with a heat source, forms the most fundamental thermoacoustic system, known as the Rijke tube. In this study, a Y-shaped Rijke tube was constructed and its multimodal oscillatory characteristics were experimentally investigated which depend on various acoustic boundaries and the location of the heat source. The study specifically focuses on how different acoustic modes contribute to understanding the overall effectiveness of discharge plasma in suppressing thermoacoustic instabilities, and how the pressure perturbations affect thermoacoustic oscillations. The results indicate that discharge plasma can completely suppress oscillations at any frequency, any modes. Furthermore, the critical average power of discharges required for complete suppression and the most effective position for discharge application in different oscillatory modes were experimentally determined.
Published Version
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