Axial Impeller/Propeller

[GarySandStorm]

Hi there, I have been researching this for some time now since the company i work for only recently stepped into the realm of the Axial flow pump and i was the lucky one to be given the task of theory gathering lol. BUT All the books and papers I have gone through use example of curved blades with some angle of attack, using aerofoil or Bernoulli theory. So I would like to know what to use when assuming the propeller blades are flat(not curved) at an angle to predict to extent the performance. IF at all possible?

Any light or direction on this would be so Great
Thx

Gareth Sampson:- Cheap W*ore oops! I mean Intern.

 

[MikeCool]

Assume the impeller/propeller to be a perfect screw. Pitch times velocity (rpm) times area equals volume. Multiply slip factors (pulled from thin air), and you have flow rate against negligable head. In short, a good CFD run would probably shed better results, but knowing max capacity is worth at least a lunch.

Mike Cool
Mechanical Engineer
American Stainless Pumps, Inc.
Los Angeles California USA

http://www.aspumps.com

 

[GregLocock]

Figure on a slip factor of 80% at max power.



Cheers

Greg Locock

I rarely exceed 1.79 x 10^12 furlongs per fortnight

 

[rmw]

If you are trying to get your mind around axial pumps, read this thread.

thread237-262245

Don't pay any attention to any of the back and forth, just the technical information. I think you will learn a lot.

rmw

 

[GarySandStorm]

Thanks for the replies. The Info is very helpfull

Nice to see someone drinking water at work instead of the usual coffee.. hhmm water? oohh eerr! yeah sure, this some gooood "water" he he he