GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS

**Definition:** This place covers:

Combustion chambers that are specially adapted for generation of gaseous combustion products of high pressure or high velocity, and therefore suitable for use as a source of motive power rather than merely a source of heat. Examples of such special adaptations are:

Methods of combustion in combustion chambers that are specially adapted for generation of combustion products of high pressure or high velocity.

**Limiting references (this place does not cover):** - Fluidised bed combustion chambers specially adapted for operation at super-atmospheric pressures -> F23C10/16

**Glossary:** - Air: a mixture of gases containing free oxygen and able to promote or support combustion - Primary air: air supplied to the burning fuel in order to liberate combustible gases - Secondary air: air supplied to the combustible gases liberated by the primary air in order to complete their combustion. The expression "secondary air" covers "tertiary air" etc. - Burner: a device by which fluid fuel or solid fuel suspended in air is passed to a combustion space where it burns to produce a self-supporting flame. A burner includes means for feeding air that are arranged in immediate connection with a fuel feeding conduit, for example concentric with it. - Combustion: the direct combination of oxygen gas, e.g. in air, and a burnable substance - Combustion chamber: a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame - Combustion zone: the part of a combustion apparatus where the reaction takes place between air and fuel - Flame tube: The portion of a combustion chamber downstream of the zone where fuel and primary air are mixed. - Fuel: any combustible material that can be burned, regardless of whether the main purpose of burning it is for releasing energy therefrom or for disposing of it or rendering it less harmful - Pilot flame: a small flame that is lit or kept alight in order to provide ignition to a more powerful burner - Retention flame: a small flame that is kept alight in order to maintain the uninterrupted operation of a more powerful burner - Torch: a burner fired with fuel gas and oxygen and specially adapted to apply heat to a workpiece, for example for use in welding, cutting or brazing