modelling combustion in micro gas turbine
 

Hello people
I have a very simple combustor geometry (circular with a nozzle at end but multiple holes at periphery)
I wish to model this flow however I will highlight what doubts I have:

1 Being a gas-gas combustion it must need a spark plug .

2 However I have seen most papers stray away from spark plug modelling.
What then is an alternative to spark plug modelling which allows good combustion results?
3 Then what combustion model assumptions(othen than non premixed) should I pick that show the combustion charesteristics most accurately.

4 Will these assumptions be good enough for flow analysis