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shrouded vs open blower wheel

shrouded vs open blower wheel

shrouded vs open blower wheel

(OP)
We've been offering a shrouded version of a small (86 inch dia, 900 rpm) PA fan with messy bolted construction for a few decades, and the only supporting technical info I've found is a reference to "increasing efficiency by  10% and reducing power for the same performance."

I've been looking in fan design handbooks and manuals for generic results of adding a shroud to an open centrifugal blower.  Everybody has comparisons of radial vs FC vs BC design.

Does someone know a source of such general information?

thanks

Dan T

RE: shrouded vs open blower wheel

university courses on aerodynamics usually contain that, so you could look at university textbooks if nowhere else is available.

RE: shrouded vs open blower wheel

Fan design is  not nearly so simple as you envision it. Fan design will require university courses and lots of hands-on training.

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