複数燃料液滴に生じる冷炎のダイナミクス

抄録

Cool flame occurs in a certain temperature and a pressure range from a hydrocarbon fuel mixtures as a result of low temperature reaction before hot flame occurrence, and plays a key role in control of ignition timing. This article introduces the mechanism of the spontaneous ignition of the cool flame. As curious behavior, cool flame shows oscillatory behavior under a certain condition. For the analysis of this dynamics which is driven under coupling with transport and chemical reactions, accompanying with cyclic domination switching between chain branching reaction and chain propagation reaction, we also introduce the projection method of the dynamic system expressed in a higher-order manifold to a low dimensional space by using Variational Auto-Encoder which consists of a deep neural network. This technique was successfully able to distinguish the state during cool flame oscillation for single droplet and droplet pair.