E.g. There is a propeller in tube. Flow speed is 30 m/s in tube.
What will be rpm. ans torque of the propeller.
Your question is unclear. I think, you're asking about a turbine, where the fluid moves the propeller, and not a propeller moving the fluid.
I'm I right ?
There is a wind tunnel with a propeller.
Wind speed eg. 10 m/s. (Not propeller moves the air.)
Air move the propeller.
What rpm is the propeller accelerating the wind?