Ignition method and ignition control device of supersonic combustor

摘要

PROBLEM TO BE SOLVED: To provide an ignition method of a supersonic combustor capable of minimizing the usage of an ignition fuel such as hydrogen by promptly and surely performing transition from ignition fuel combustion to main fuel combustion, and an ignition control device.;SOLUTION: The ignition control device 32 has a structure to be controlled so that the injection of an ignition fuel into a flame-keeping cavity 16 by an ignition fuel injector 17 is started, the injected injection fuel is ignited by a spark plug 18, the injection of a main fuel into an air passage 15 by a main fuel injector 21 is started after it is determined that a cavity pressure measurement value by a cavity pressure gage 31 is set not smaller than a main fuel injection starting cavity pressure threshold P2, and the injection of the ignition fuel into a flame-keeping cavity 13 by the ignition fuel injector 17 is stopped after it is determined that a cavity pressure measurement value by the cavity pressure gage 31 is set not smaller than an ignition fuel injection stopping cavity pressure threshold P3 higher than the main fuel injection starting cavity pressure threshold P2.;COPYRIGHT: (C)2012,JPO&INPIT