THE FIRE EXTINGUISHING IN CABLE WORKS BY MEANS OF POLYDISPERSE HIGH-EXPANSION FOAM
There are considered problems of use of high-expansion foam generators for fire extinguishing in cable works. High fire extinguishing capability of high-expansion foam generators depends on the foam structure that includes, along with a monodisperse foam, the separate inclusions of large diameter, which can dramatically reducing the capillary viscosity and limiting shear stress of the foam. Filling of enclosed spaces at high altitude is achieved by reducing the maximum capillary pressure, which may occur in some foam portions. The design equations to determine the time and specific consumption of foam when extinguishing fires in cable tunnels are proposed.