[saleh alsubari]

Dear friends

i have problem to find the RPM of the turbine blades given that the mass flow rate.means that ,the RPM must be output ...is there any one can help

thanx in advance

[abdul099]

You'll find the answer in several posts you've already answered to ask for an explanation.
I'm in a good mood, so I'm doing the work to type a short version of the explanations of 5 other posts:
Set your case up (mesh, physics etc.), run with a more or less arbitrary rpm and compare the torque generated by the turbine with your load torque. Adjust the rpm, run, compare again etc.
Repeat this until your output torque equals the load.

When you need more information, PLEASE don't just ask for information, PLEASE READ the posts you've already found. It's all explained there and should answer most of your questions.