Figure 7.15. Air Bleed and Anti-Icing System.
The anti-icing system consists of an anti-icing valve, two tubes, and passages within the
compressor front support. During operation of the system, the anti-icing tubes deliver hot air from the
anti-icing valve to the two ports on the compressor front support. These ports deliver the hot air into an
annular passage formed between the dual-walled housing. Hot air flows from the annular passage
through the hollow inlet guide vanes into the front bearing support hub. Some of the air flowing
through the struts is exhausted out of slots on the trailing edge of the guide vanes, and the remaining air
is exhausted out of holes in the front bearing support hub. During anti-icing operation, all surfaces of
the compressor front support which come in contact with compressor inlet air are heated and ice cannot
form.
7.11.
IGNITION AND TURBINE OUTLET TEMPERATURE MEASUREMENT SYSTEMS
The ignition system is composed of three components: a low-tension capacitor exciter-
assembly, a spark igniter lead, and a
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