Frequencies of gas oscillations in a pipe with a concentrated heat source

7th Conference on Low temperature Plasma in the Processes of Functional Coating Preparation

Iovleva, O.V.^1 ; Larionov, V.M.^1 ; Semenova, E.V.^1

Kazan Federal University, 18 Kremlyovskaya str., Kazan

420008, Russia^1

关键词: Acoustic oscillation;    Calculation results;    Concentrated heat sources;    Gas oscillations;    Heat sources;    Linear distribution;    Nonmonotonic changes;    Step changes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/669/1/012023/pdf
DOI  :  10.1088/1742-6596/669/1/012023

来源: IOP

【 摘 要 】

It is known that the location of the heat source significantly affects the frequency of acoustic oscillations in the channels. The case of a step change in the sound speed is investigated. In this article, linear distribution of sound speed in hot gas is considered. The well-known equations are used to calculate frequencies of the gas oscillations. The analysis shows that the movement of the flame from the down up in an open tube causes a nonmonotonic change in the resonant frequency. The calculation results are in good agreement with the experimental data.