レイケ管振動燃焼発生機構に関する研究

抄録

Self-excited vibration called the combustion vibration occurs in the combustion apparatus. The vibration and noise adversely affect combustion apparatuses. Therefore it is necessary to control the generation of vibration. But the mechanism of the onset of vibration has not been sufficiently elucidated and countermeasures have not been established. The purpose of our research is to analyze the mechanism of generating the combustion vibration using a cellular automaton method (abbrev. CA). Since a combustion apparatus is in three-dimensions it is difficult to analyze. In this study we analyzed the combustion vibration with a Rijke tube which can be treated in a one-dimensional model. At first, we conducted experiments and confirmed that the wall surface temperature inside the pipe affects noise generation. Next, we established the rule of the CA method. For example, expansion by heating as "Source" and contraction by cooling as "Sink". In addition, we developed a calculation model using CA method. As a result, we was able to confirm a state of the self-excitation vibration.