Topic: Re: How can I calculate my power number and power required for two different impellers?13 December 2011
Roderic Merlini Community Member 1 Post
Re: How can I calculate my power number and power required for two different impellers?22 July 2014 at 5:08amHi, After reading the answer, I understand that in case of multiple impeller stages (mounted on a same shaft), the total power is the sum of the partial power independent of what kind of impeller are mounted on? the space between the two or three impellers are not important too? is that correct ? Thanks for your expertise
Dave Dickey Forum Moderator 351 Posts
Re: How can I calculate my power number and power required for two different impellers?22 July 2014 at 9:20am
The power required by multiple impellers on the same shaft is usually the sum of the separate impellers. The power for each impeller should be calculated separately and will depend on the impeller type and even involve impellers of different diameters. In most cases, the total power is just the sum of the individual impeller powers, unless that impellers are close together. If the impellers are less than a half an impeller diameter apart, the total power may be slightly less than the sum of the adjacent impellers. The interaction between impellers is not a common or major problem.