- #1

MysticDream

- 89

- 6

- TL;DR Summary
- Seeking insight on how to calculate the absolute velocity

How can I calculate the absolute velocity of air at the outlet of a centrifugal compressor if I have:

Diameter of impeller

RPM

Slip factor

I've been reading for weeks and cannot seem to find the answer to this question. For anyone who is familiar with the subject, I'm sure you know about the blade angle, slip factor, radial and tangential components of flow velocity, and absolute flow angle. It's the absolute flow angle that I cannot find any formulas for. Knowing this, I'd be able to calculate the absolute velocity if I know the tangential velocity of the gas, which is a function of the slip factor and tip speed. I can find nothing that relates the radial component of the flow velocity to the RPM or tip speed of the impeller. Any help would be appreciated.

Diameter of impeller

RPM

Slip factor

I've been reading for weeks and cannot seem to find the answer to this question. For anyone who is familiar with the subject, I'm sure you know about the blade angle, slip factor, radial and tangential components of flow velocity, and absolute flow angle. It's the absolute flow angle that I cannot find any formulas for. Knowing this, I'd be able to calculate the absolute velocity if I know the tangential velocity of the gas, which is a function of the slip factor and tip speed. I can find nothing that relates the radial component of the flow velocity to the RPM or tip speed of the impeller. Any help would be appreciated.