Air Breathing for VTVL

"Paul F. Dietz" wrote in message ...
Greg wrote:

There are blade tip clearance losses that dominate in small turbines
also. Radials don't suffer as badly from that esp. if there are of the
closed impeller type.

Are radial compressors more subject to FOD?

Paul

Possibly not - We were working with a APU having a radial
compressor.The manufacturers rep mentioned that one had swallowed an
engineers flashlight
and showed no damage when it was stripped down

Craig

Peter Fairbrother writes:

Talking of models, I used to use Jetex "augmenter tubes" when I werre a lad.
They "captured and entrained" air with the the Jetex exhaust, and heated and
accelerated it (supposedly!. Long story, but they did actually work, and far
better than the static figures show when at speed and tuned up).

Do a google on "air augmentation," or look up the word "entrainment" in a
good dictionary.


-- Gordon D. Pusch

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