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Air Scroll  
User currently offlineBryan Becker From United States of America, joined Mar 2001, 333 posts, RR: 0
Posted (14 years 7 months 2 weeks ago) and read 843 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

1 replies: All unread, jump to last
User currently offlineBuzz From United States of America, joined Nov 1999, 697 posts, RR: 20
Reply 1, posted (14 years 7 months 1 week 6 days 13 hours ago) and read 816 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.

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