Greetings,
SimScale has 2 different approaches for rotating zones, MRF (multi reference frame) and AMI (arbitrary mesh interface), both of which require an angular velocity as input, therefore:
- 1: You do have to explicitly set them as an input;
- 2: RPM values would be the ones that you input. As for torque, yes, you can calculate the value based on forces and moments. An interesting discussion is in this thread;
- 3: With these restrictions, I think the easiest way to do this would be to estimate the angular velocity of the propellers when generators or other equipment are attached.
SimScale released a webinar on propellers if you want to take a look.
/Ric