Abstract
This paper deals with unsteady behavior of fire plume. Quantitative investigation of the gravity effect was performed for acetone and kerosene pool fires. A centrifuge was used to examine the gravity effect. Small-scale pool fires were observed under various high gravity fields. Regions of stable flame, puffing flame and irregular oscillatory flame were mapped with the gravity level and pool diameter. Puffing phenomena observed under various gravity fields were summarized with the Strouhal number (St) and Froude number (Fr). As the result, we could obtain an empirical equation of St=0.517Fr^^ -0.502.
