Abstract: The proposed group of inventions relates to methods and devices for creating a gas-drop jet used for fire-fighting. The proposed inventions may be used for suppressing turbary, forest fires, fires in high-altitude buildings, etc. since they provide an increase in speed of extinguishing jet and a long range, thus raising the extinguishing properties of a jet. The aims of the proposed group of inventions are as follows: Creating an efficient stand-alone modular installation, allowing to obtain a jet of extinguishing fluid with an increased range and speed of flight and to use it independently or and in a complete set with various delivery vehicles (a car, a plane, a helicopter, etc.); Improvement of the thermodynamic cycle of the fire-fighting installation using gas turbine engine, and increase of its efficiency; Replacement of air containing an oxidizer (oxygen), used for creating a gas-drop jet, by products of combustion that are containing almost no oxidizer.

Abstract: The present invention comprises supplying a liquid onto the source of a fire from an aircraft (7), wherein said liquid is supplied in the form of gas-droplet stream (8) obtained by dispersion in a gas flow and by acceleration of the dual-phase flow in a gas-dynamics nozzle (4). The pressure at the inlet of the nozzle (4) as well as the relative concentration of liquid in the dual-phase flow are selected according to conditions enabling the formation of a dual-phase low-dispersion and high-speed flow which has a high extinguishing-substance concentration and remains stable when submitted to interference. The fire-extinguishing device of the present invention comprises a liquid supply system (1), a gas supply system (2), a mixing chamber (3) for the gas and the liquid as well as a gas-dynamics nozzle (4), wherein all these members are is arranged onboard on aircraft (7). The gas-dynamics nozzle supplies the liquid towards the area of the fire source and is connected to a vessel through a duct.