Quote:
|
Originally Posted by bobkoure
I wonder how length of rotor vane plays into this...(?) Is it rpm x outer diameter? rpm x average diameter? Just more being curious - if you don't know off hand, maybe you can point me at the appropriate text? Not that I'll necessarily understand it - but I'll leave you in peace while I try to.  |
I think there is another important parameter/data: blade height. Fast and big impeller will not generate any flow/pressure while it is plain. By this way, closed impeller could generates good flow as big as distance between its plates. That is how tall are blades will act on pressure/flow ratio. Similarly, fans with same speed (rpm) and diameter can generate different air flow by increasing blade tichness (25mm x 38mm fans).
I wish i had made this clear. And i am just curious too.