Hi @JMiller123, thanks for posting on the forum and welcome to the SimScale Community 
It’s tough to spot where the problem exactly is since your simulation has many additional complexities in the setup, namely:
The first advice I’d give you would be to do a first analysis with all of these global settings disabled and get that run converged before moving forward to more complex scenarios. Also, is there a specific reason why you feel it necessary to enable the “Compressible” toggle? I don’t see large temperature deltas on your simulation to justify enabling it (keep in mind natural convection effects are still modelled even with this option disabled).
As a last pointer, keep in mind that, if a wall is not assigned a particular boundary condition, it will be set automatically as a no-slip adiabatic wall.
Cheers
Igor