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Can you give us a quick summary on the compressor stall suppression system? I'm just curious.
On start-up, the HP compressor goes through a spin-up, and when the combustion cans (cannulures) see the correct combustion temperature, the ignitors turn on and pressurized fuel is sent through the fuel rail for "light-up."
The problem was in the restart. Sometimes one or more cans did not "light-up," so the pilot or FE shut the engine down for a re-start or recycle sequence.
If there was fuel pooling in the combustion can, an attempted restart could cause an explosion and or a reverse flame could propagate to the HP compressor blades.
This system automatically defined a specified compressor restart sequence before ignition and fuel rail pressurization. In other words, we forced a liquid fuel and vapor "purge" before restart.
Another milestone was that the whole system was modeled in a System Software package to verify it's operation before installation.
One of the more 'funer' projects at the big B.