Editing Ramjet (section)

===Combustor===
As with other jet engines, the combustor raises the air temperature by burning fuel. This takes place with a small pressure loss. The air velocity entering the combustor has to be low enough such that continuous combustion can take place in sheltered zones provided by [[flame holder]]s.

A ramjet combustor can safely operate at [[stoichiometry|stoichiometric]] fuel:air ratios. This implies a combustor exit [[stagnation temperature]] of the order of {{convert|2400|K}} for [[kerosene]]. Normally, the combustor must be capable of operating over a wide range of throttle settings, matching flight speeds and altitudes. Usually, a sheltered pilot region enables combustion to continue when the vehicle intake undergoes high [[flight dynamics|yaw/pitch]] during turns. Other flame stabilization techniques make use of flame holders, which vary in design from combustor cans to flat plates, to shelter the flame and improve fuel mixing. Over-fuelling the combustor can cause the final (normal) shock in the diffuser to be pushed forward beyond the intake lip, resulting in a substantial drop in airflow and thrust.