Experimental studies on flame spread across thermally thin solid fuel surfaces under lower ambient pressures

The ground experimental studies on flame spread across solid fuel surface were conducted under various ambient pressures. The results show that flame-spread rates are sensitive to ambient pressure and decreases as the ambient pressure decreases in a lower range of ambient pressures. But in a higher ambient pressure, the flame-spread rates are independent of ambient pressure. Based on the results, analyses of mechanisms of the flame spread across solid fuel surfaces in various ambient pressures were suggested.