METHOD OF SURFACE FOREST FIRE CONTAINMENT Russian patent published in 2009 - IPC A62C3/02 A01G23/00 

FIELD: agriculture, forest fire.

SUBSTANCE: method of surface forest fire containment involves creating a counterfire belt of burnt forest fuels in front of the fire front and fixing its outer boundary. Forest fuels are burnt by a high-temperature supersonic gas jet which is generated as an axisymmetric or flat one. The counterfire belt boundary is fixed by the low-temperature jet of water which is supplied simultaneously with the high-temperature jet to the external counterfire belt edge in respect to the fire front. Angle ψ between the centre lines of the jets is chosen so that to prevent overlapping of the contact areas between the high- and low temperature jets and the forest fuels surface; in particular ψ≥arccosH/L₁-arccosH/L₂ where H stands for the average height from the treated surface to the high- and low temperature jet sources, L₁, L₂ - the range of the high- and low temperature jets respectively.

EFFECT: increasing efficiency and safety of creating a supporting belt for the containment of forest or steppe surface fire.

3 cl, 1 dwg