Abstract
The effect of sample width on limitation of flame spread along a sheet of filter paper was investigated under microgravity environment. The test sample having three different kinds of width, 50, 60 and 80mm were employed. The opposed gas flow rate was 3cm/s, with oxygen concentration from 17 to 25 vol%. As sample width increases, the spreading flame separates to be cell flame in the direction of width. The amount of oxygen supply diffusion increases due to becoming cell flame. Therefore, the minimum oxygen concentration for flame spread decreases with increasing sample width.
