design of straight blade impellers 1

[babwo]

I'm trying to find the governing equations (flow, pressure, etc.) for straight blade impellers (given dimensional information). Also, are there equations for the effect of viscosity on the pumping performance?

 

[tstead]

The theoretical equations for straight blade impellers are no different than standard curved equations, except for the value of the blade angle is pi/2 instead of whatever.<br><br>Yes, there are viscosity correction factors but these are based on real pumps - not theoretical ones.&nbsp;&nbsp;I'm not too terribly confident that they will mean that much when compared with a theoretical pump.<br><br>Nevertheless, you can find such correction factors in many pump books and literature.