Starting and ignition - Gas turbine

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Gas turbine
14. A gas turbine starter is used for some jet engines and is completely self-contained. It has its own fuel and ignition system, starting system (usually electric or hydraulic) and self-contained oil system. This type of starter is economical to operate and provides a high power output for a comparatively low weight.

Fig. 11-9 A gas turbine starter.

15. The starter consists of a small, compact gas turbine engine, usually featuring a turbine-driven centrifugal compressor, a reverse flow combustion system and a mechanically independent |free-power turbine. The free-power turbine is connected to the main engine via a two-stage epicyclic reduction gear, automatic clutch and output shaft.  A typical gas turbine starter is shown in fig. 11-9.





16. On initiation of the starting cycle, the gas turbine