In order to model a compressor-turbine test rig I'm trying to model the bearing losses. I'm using the same compressor/turbine-blocks used in the Aircraft Environmental Control System (Matlab command: ssc_aircraft_ecs). I'm aware that it's possible to implement a mechanical efficiency to the compressor- and the turbine-block. But that's not the solution I'm looking for.
I have empirical values for the bearing losses for different operating points. And the values are expressed in [kW] as the power getting lost in the bearings. A perfect solution for me would be a sink or something that I can connect to the shaft "absorbing" the desired power. Or maybe it could be an option to "cut" the shaft, measure the power, remove the losses and use an ideal source to provide the power gained by the turbine to the compressor. I would be really happy about a solution or ideas that could work.