Frozen rotor turbine - low efficiency
 

I got the task to calculate some turbo turbine wheels with frozen rotor.
Some how I have a bug inside my simulation, my efficiency is between 30-40% only.
Could somebody show me an example report?

I have coupled, SST, Ideal Gas, Air (sutherland law).
Turbine boundary has Reference Frame Rotating, Axle def is correct and checked.
Tangential Velocity shows no difference (fixed or not).

I have found the mistake.