In the fire location, an ambient or
atmospheric air mass flow (been a gas mixture of dry air and
superheated water vapor) is compressed by a compression
package. A hose transports this
compressed air mass flow a given distance away up to a flames site, where an arrangement of pipes,
elbow accessories,
throttle valves, nozzles, and a distribution manifold, conforming together a fire fight boom with a “blast-gun”, allow the operator to direct upon the flames, a high speed
ambient air jet containing water droplets with a high
flame front aerodynamic penetration capability, which brings about the flames blown off and remaining not burned materials
combustion inhibition. Such a high speed air jet containing water droplets is generated by the
compressed air mass flow expansion in a jacketed convergent-divergent
nozzle, whereinto a condensation sock wave is established producing such water droplets from the local
ambient air water vapor contents. The air jet proximity to the flames' origin is important, and the operator's movements can be controlled by a wheel, a
pneumatic cylinder, supports, and pivoted anchors. To preclude, in this process, the
inflammation of surrounding non burning materials and the existence of run-away
flame fronts, different aerodynamic
flame containment mechanisms are formed by other air jets produced in convergent nozzles air expansions. To allow the low temperatures required and the successful establishment of the condensation
shock wave, a cooling air flow insulates, from the hot flame environment, the air flow expansion in the jacketed convergent-divergent
nozzle. The aspersion mechanism formed by the
air mass flow expansion, is utilized also to deliver different chemical fire fight agents to the flames sites with a high flame front penetration capability.