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Air Scroll  
User currently offlineBryan Becker From United States of America, joined Mar 2001, 333 posts, RR: 0
Posted (13 years 2 days 16 hours ago) and read 684 times:

What is a air scroll on a APU,What does it do,And what is it used for?Thanks Smile



-BryanBecker Big thumbs up

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User currently offlineBuzz From United States of America, joined Nov 1999, 697 posts, RR: 22
Reply 1, posted (13 years 2 days 6 hours ago) and read 657 times:

Hi Bryan, Buzz here. It's one of those funny names for the inlet area of a centrifugal compressor. If you got close enough to kiss one (got to be a mechanic sometimes) you'll notice that it's kind of rolled up (like a scroll), sea-shell shaped so the air is inhaled , spun around by the impeller, and slung out to edges to the diffuser (another word with the same basic meaning). The diffuser uses Bernoulli's law in reverse: turns high velocity into pressure with a divergent (spread apart) area to slow down the air.
g'day


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