SailNet Community - View Single Post - overpropped vs underpropped
View Single Post
post #33 of Old 12-17-2012
Bombay Explorer 44
TQA's Avatar
Join Date: Apr 2009
Posts: 3,257
Thanks: 0
Thanked 111 Times in 107 Posts
Rep Power: 8
Re: overpropped vs underpropped

Originally Posted by Oaksail View Post
I test pumps and fluid flowrates for a living. Centrifugal pumps and fans operate with direct proportional flow rate vs rpm.
Decrease a pump by 15% rpm and you get 15% less flow.
Dat not wot my text books and test results said.

Notice that larger pumps are inherently more efficient and that efficiency drops rapidly at specific speeds of 1000 or less. Jacques Chaurette p. eng.
Primary coolant centrifugal pumps would be classed as small?

However I know I am not a centrifugal pump expert.
TQA is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome