Quote:
Originally posted by WAJ_UK
You can get turbine style impellers where there are stator vanes in the housing around the outside of the impeller. They curve the opposite way to the blades on the impeller and expand towards the outside of the housing slowing the flow down thus increasing the flow pressure. Sorry no links just heard about it somewhere. I don't know if there are any pumps around with housings like this. They work a bit like the stator vanes in a gas turbine engine
Edit
just thought of an example. the vanes on the delta focused flow fans. just with a pump impellor the flow is coming from the centre (Radial not axial) so the vanes are around the outside of the impeller
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Yes, I've been looking out for pumps like this. According to what I've been reading, they are more efficient than centrifugal style pumps for the same power input, even for the closed impeller designs. Dramatically more pressure head than even a closed impellor cent. pump at the same RPM, but for quite a deal less power consumption.
More information can be found here:
http://www.animatedsoftware.com/pumpglos/turbinep.htm
Here's a manufacturer of turbine pumps in the USA:
http://www.albany-pump.com/pumps/turbine-pumps.html
Further information here:
http://www.dynafloweng.com/regenturbinepumps.html
Something like the MT-2003 from that last link would make a nice WC pump.