Gas turbine engine with separate combustion chambers - has insulating mantle round combustion chambers to reduce heat losses

摘要

A gas turbine has a turbine impeller (11) on a shaft (16) which is extended to carry a compressor. Between the compressor and the turbine there is a ring of combustion chambers (3, 6) arranged in a circle round the shaft. There is an outer casing (1) round the combustion chambers and turbine. A hollow annulus (2) is arranged round the combustion chambers within the casing. It has either a vacuum inside it or insulating material. This reduces heat losses from the combustion chambers and increases the efficiency of the engine. There is a similar insulating annulus between the combustion chambers and the shaft.