{HEAD ~ an arrangement} for determining {TAIL ~ the combustion duration} from an energy conversion which is calculated using a polytropic equation of state 
for determining
{ HEAD ~ an arrangement } for determining { TAIL ~ the combustion duration } from an energy conversion which is calculated using a polytropic equation of state
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH