Abstract:

Using shock tube and coherent experimental technique, the sweeping process of shock wave in ground, forest belt and flame field is photographed, the sudden extinguish time of flame and the overpressure of shock wave was measured. The research showed that it was obvious for shock wave extinguishing forest fire, the high dynamic pressure induced by shock wave may be the immediate cause of extinguishing flame. Moreover the overpressure, negative pressure and temperature rise of air causing by shock wave would make the combustible pyrolysis gas of forest tree mix with atmosphere then ignite and burn out, which probably is an important effect in restraining forest fire.

Key words: Fighting fire, Shock Wave, Forest fire