Experimental study of slope effect on canyon fire spread
The canyon fire can potentially trigger a catastrophic wildfire resulting in significant loss of life.This paper presents experimental research on canyon fire spread with a line ignition under different central slope angles(0°,10°,20°,30°)and lateral slope angles(10°,20°,30°).The canyon fire spread table has a size of 6.0 m(length)×8.0 m(width).Pine needles were used as fuel.When the central slope angle is higher than 10°,the fire line contour is of concave shape,due to the fire head moving to the lateral side of the fuel bed with increasing lateral slope angle.The fire spread rate increases with the increasing central or lateral slope angles.The gas velocity ahead of the flame front along the canyon centerline increases with the increasing central slope angle or decreasing lateral slope angle.When the central slope angle is higher than 20°and the lateral slope angle is higher than 10°,the eruptive fire occurs on the canyon centerline.
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