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Acoustic Characteristics of Self-Sustained Oscillations Occurring due to the Interaction of a Supersonic Underexpanded Jet with a Cylindrical Cavity

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Abstract

In high-pressure gas–jet Hartmann generators, the source of acoustic energy is kinetic energy of a gas jet by the supercritical ratio between the operation and ambient pressure. Under certain conditions, onflow of a supersonic jet to a resonator is accompanied by powerful self-sustained oscillations with irradiation of acoustic waves into the environment and resonator cavity. A model of a self-oscillating process arising from the interaction of a nonisobaric jet with semi-closed cylindrical cavities is considered, which allows one to identify typical elements of the gas-dynamic structure of the forming flow. The physical pattern of the flow in the gas–jet generator has been discussed and the study of the dependence of the self-sustained oscillation characteristics on the key gas-dynamic and geometric parameters has been performed.

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Authors and Affiliations

  1. Baltic State Technical University Voenmekh, 190005, St. Petersburg, Russia

    K. N. Volkov, V. N. Emel’yanov, A. V. Efremov & A. I. Tsvetkov

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  1. K. N. Volkov
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  2. V. N. Emel’yanov
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  3. A. V. Efremov
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  4. A. I. Tsvetkov
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Correspondence to K. N. Volkov.

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Translated by N. Podymova

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Volkov, K.N., Emel’yanov, V.N., Efremov, A.V. et al. Acoustic Characteristics of Self-Sustained Oscillations Occurring due to the Interaction of a Supersonic Underexpanded Jet with a Cylindrical Cavity. Tech. Phys. 65, 703–709 (2020). https://doi.org/10.1134/S1063784220050254

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  • DOI: https://doi.org/10.1134/S1063784220050254

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