Abstract
In order to investigate the combustion behavior of premixed-spray flames, time-series measurements have been conducted using optical diagnosis techniques that have highly spatial and temporal resolution such PDA, a high-speed camera with laser visualization, a Cassegrain optical probe system. By processing obtained data in these measurements statistically, the detailed structure of premixed-spray flames could be observed. However, they are still not enough to explain the cause of the rapid disappearance of premixed spray named "preferential flame propagation". This paper introduces some of these results and our recent experiments to approach more detailed combustion behavior of spray flames.
