Experimental study of gas dynamics flow parameters in the ACDI channel with a deep cylindrical resonator in the presence and without the studied sample

A. A. Zhilin

Čelâbinskij fiziko-matematičeskij žurnal, Tome 9 (2024) no. 2, pp. 222-231.

Résumé

This study is aimed at the experimental research of gas dynamic flow parameters in the acoustic-convective drying system (ACDS) duct of the ITAM SB RAS. During the experiment, the flow temperature is recorded in the resonating cavity end vicinity and at the cylindrical resonator surface. Two variants of gas-dynamic flow in the waveguide are considered when the sample is installed in the ACDS working part path and when it is not present. As a result of experimental studies, it was revealed that when the test sample is placed in the ACDS path, the signal recorded without the sample changes at the input to the working part; the signal turns 180$^\circ$ relative to the origin point, while the frequency response and temperature of the working flow do not change. The dynamics of changes in gas temperature near the end of the resonating cavity when placing the sample in the ACDS working part was obtained. The maximum gas temperature in the resonating cavity, which is achieved in the presence of an obstacle in the ACDS path, has been determined. Registration of temperature with surface thermocouples showed that the resonator can be conditionally divided into two areas: 1) near the blind resonator end, where the effect of placing the sample in the ACDS is observed; 2) near the open resonator edge, where there is no influence.

Détail

Keywords: supersonic underexpanded jet, Hartmann generator, deep resonator, temperature distribution in the resonating cavity, the influence of obstacles on the frequency response flux.

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