RU94028142A - Ignition device - Google Patents

Abstract

FIELD: devices for starting steam generators, gas turbine plants, liquid-propellant rocket engines, open-hearth furnaces and other power plants employing energy of burnt high- calorific non-hypergolic propellants, mainly oxygen-hydrogen propellants. SUBSTANCE: device has initiating head and precombustion chamber where ignition spray is formed for main consumption of components in combustion chamber. Fitted in initiating head is spark plug whose central electrode is located in propellant main and inside cylindrical header of oxidizer; part of oxidizer is fed to central electrode through spray injectors. Precombustion chamber has hollow housing whose longitudinal ribs form passages for feeding propellant to outlet nozzle of precombustion chamber; these passages are inclined relative to axis of device at angle of 37 to 52 deg. Even distribution of temperature field in cross section is less by 2.5 to 3 times as compared with prototype. EFFECT: enhanced reliability of ignition and reliable formation of ignition spray.

Claims (1)

The invention relates to devices for starting steam generators, gas turbine units, liquid rocket engines, open-hearth furnaces, etc. power plants operating on the energy of burned high-calorie non-combustible fuels, mainly oxygen-hydrogen. The device comprises an initiating head and a pre-chamber, where an ignition torch is formed for the main component costs in the combustion chamber. A spark plug is mounted in the initiating head, the central electrode of which is located in the fuel line and inside the cylindrical collector of the oxidizer, and a part of the oxidizer is fed through the jet nozzles to the central electrode. The prechamber housing is hollow, where the fuel supply channels to the outlet nozzle of the prechamber, inclined to the axis of the device, are formed by means of longitudinal ribs. Distinctive features: the placement of the oxidizer jet nozzles in the radial protrusions of the annular collector and the inclination of the cooling channels by an angle of 37-52 ° ensured the reliability of ignition of the gas mixture and the reliable formation of the ignition flame with a uniform distribution of the temperature field in the cross section with a length 2.5-3 times less than in the prototype.