[omx45]

I've been having a lot of trouble creating a performance map for a compressor wheel design. I'm trying to optimize an existing design and have spent the past few weeks trying a large variety of changes but not getting the desired results.

I signed up with SimScale to do the CFD work, but have an old version of SW Flow Simulation for trial runs.

For Flow Simulation I'm having these problems:
I've tried a ton of settings but it won't converge. First I ran with 14.7psi inlet and outlet. This gave me a mass flow rate starting point. I then used that as either in inlet boundary condition and pressure outlet, or the vice-versa. This would have allowed me to build a pressure differential in between the inlet and outlet

Issue I'm finding is no matter what flow rate value (volume or mass) I use, whether it's inlet flow or outlet flow, it results in some real extreme pressure differences and just bounces like crazy. It won't converge with realistic numbers.


For Simscale, it is giving a super high torque reading of around 130nm.
Can any advise be given? It's a typical sub-sonic compressor wheel 5" in diameter, running 40,000 RPM.


I've used this site as a guideline, but my chart when running the sim looks more like a heartbeat up and down all over the place than his converged results: https://hawkridgesys.com/blog/solidworks-turbocharger