shrouded vs open blower wheel

[Tmoose]

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

 

[Drazen]

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

 

[willard3]

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