as I mentioned in my previous post (https://forum.solidworks.com/message/277008#277008) Menthor Graphics introduced combustion in FloEFD in 2011.
As you know it's the same solver.
I found FloeFD tutorial on combustion over the internet, you can see it in attach.
I think that since they have it, we could get it too soon, we just need to push voting for this enhancement request.
Here's the enhancement request to vote for:
SPR 541437 - Support Combustion.
And here's a video that explains how to vote for an enhancement request, it's quite easy!
So vote, vote, vote.
Do it also at the end of the year, when there's SolidWorks Top 10 ideas.