23 Gas Turbines Ignition Systems – LMS

Results

DC current if the ignition system is fed by AC voltage.

An AC voltage in order to facilate transformation to a higher voltage.

A pulsating AC voltage in order to generate a more powerful spark.

A DC current to the transformer to facilate the generation of a higher voltage to the ignition

If the HP fuel valve is opened at a relatively high compressor rpm, this may result in a hot start

the higher the starter air pressure, the higher the EGT during starting

If the air starter seizes, the engine can still be started by means of another air bleed source

the selected igniters are activated after fuel is delivered to the fuel nozzles

engine intake anti-icing only

engine igniters

airframe de-icing only

both engine intake anti-icing and airframe de-icing

commences upon starter motor engagement, and is deactivated at a rotor speed of approximately 15% below idle rpm.

should commence after fuel has entered the combustion chamber.

should commence prior to fuel entering the combustion chamber.

should commence prior to starter motor engagement to prevent a hot start.

1, 3

1, 2

3 - 4 - 5 - 6

2 – 3 - 4

will continue to operate without any starter motor assistance.

will enable the generators to supply bus-bar voltage.

is designed to idle after starting.

operates most efficiently in the cruise.

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