Investigation of the cylindrical resonating cavity effect on a jet's near acoustic field in the two-channel system

A. V. Primakov ; A. A. Zhilin

Čelâbinskij fiziko-matematičeskij žurnal, Tome 9 (2024) no. 2, pp. 277-286.

Résumé

Numerical gas flow modeling in the two-channel resonance system path of ITAM SB RAS is carried out. Numerical simulation of a nonstationary acoustic-convective flow was carried out using the Ansys Fluent software package in a three-dimensional formulation. As a result of the simulation, the gas-dynamic characteristics of the flow in the system central part, where a supersonic under-expanded jet is formed, are obtained. The analysis of pressure distributions in the first barrel of the jet near field, as well as inside its structure under the conditions of a two-channel system, is carried out. Six points in the near field of the jet were selected for the study. Taking into account the unsteadiness of the flow in the resonant system path, the studied points record the fluctuations of the formed flow and the change in the jet structure. The spectral composition is estimated near and inside the jet undisturbed by the resonator and a comparison with the spectrum of the resonant system is presented. The possibility of influencing the jet structure and acoustic characteristics near the jet using a resonator is shown.

Détail

Keywords: upersonic jet, acousto-convective two-channe system, Hartmann generator, resonator, wave interaction, high-intensity oscillations.

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