Suppose i have a ramjet engine, but in the combustion area i make an opening along the whole cirumference (a slit) feeding a channel, in which the pressure is the same as in the combustion chamber. The pressure inside the combustion area will be then the same as in the original engine (is that correct?), but the mass flow to the exhaust nozzle will be reduced. What formula should i use to adjust the nozzle shape for these operating conditions?

  • $\begingroup$ Would the pressure be the same with the 'leak' present? I am just spit-balling here but the only way that would be possible would seem to be by increasing the fuel/air input, thus maintaining the same mass flow as pre slit. $\endgroup$ – Mike Brass Nov 25 '18 at 10:56

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