Conventional design of impeller
Conventional design of impeller
(OP)
I am using conventional method to design a water pump impeller. But my blade profile is too long. I want to shorten the length of the blade by keeping the inlet and exit angles same. What are parameters I can play with to reduce the length.





RE: Conventional design of impeller
Establish the length of the blade you want/need (straight from tip to connection) and then adjust the arc radius to match the inlet/outlet angles of the original design.
A few things to consider:
- Increasing the arc radius will increase the flow rate but descrease efficiency. It's a give and take relationship, in which you'll need to find the optimal setting.
- The profile of your blade doesn't have to be a perfect arc. You can always favor a sharper angle to the inside or outside.
- Small adjustments make lots of difference.
Hope this helps!
Kyle
Kyle Chandler
www.chiefengineering.net
"To the Pessimist, the glass is half-empty. To the Optimist, the glass is half-full. To the Engineer, the glass is twice as large as it needs to be!"