Combustion modeling with shockwave
 

Here's my issue:
I have modeled a tube with an obstacle in it, in 2D. The premixed fluid goes at Mach 3 initially. I obtain good things, shock waves and boundary layers. But I now wanna implement combustion of this fluid. Which model would you advise me? I tried to use some of them, but I have the problem that some of them use "Fluid Stream Manager", supposing that the flow is isentropic...
So that shock waves do not appear in these models. Any guess?