Research on Modeling the Generation Mechanism of Rijke Tube Self-excited Sound

Abstract

Self-excited vibration called combustion vibration is generated in the combustion device. The vibration and noise adversely affect the combustion equipment. Therefore, it is necessary to suppress the generation of vibration. The Rijke tube, which easily generates self-excited oscillation, is famous, and it is known that the self-excited oscillation of the Rijke tube is represented by the linear sum of particle velocities. The purpose of our research is to quantitatively represent the linear sum of particle velocities. There are two ways to create a model of the heat source, one is derived from the one-dimensional heat conduction equation. In addition, four types of vibrations could be expressed using a cellular automaton method (abbrev.CA), and the same could be expressed in a one-dimensional vibration mode system.