Understanding of auto-ignition mechanism and soot formation of unburned premixed mixture under micro-scale

本研究的目的是研究传播火焰压缩的未燃烧混合气的自燃机理和碳烟的形成。采用加压扩张机。主要研究内容如下：(1)可视化地研究了氢气混合气在传播火焰作用下的自燃过程；(2)研究了发动机爆震过程中的低温化学碳烟生成、燃料组分对碳烟生成的影响、预混充气压缩点火过程中碳烟的生成以及压力波引起的壁面碳烟生成等问题，以了解发动机爆震过程中的发光火焰。

The purpose of this study is to investigate auto-ignition mechanism and soot formation of unburned mixture compressed by propagating flame. Compression-expansion machine were used. I investigated as follows ; (1) auto-ignition of unburned mixture of hydrogen compressed by propagating flame were visualized, (2) soot formation under low-temperature chemistry, effect of fuel component on soot formation, soot formation during premixed charge compression ignition, soot formation near wall due to pressure wave, were investigated in order to understand luminous flame during engine knocking.