| 摘要 |
1,049,977. Re-igniting burners. ROLLSROYCE Ltd. Nov. 11, 1965 [Nov. 19, 1864], No. 47264/64. Heading F4F. An ignition device comprises catalytic igniters 10 provided in the reheat chamber 5, Fig. (not shown), of a gas turbine engine within housings 20, the upstream portion 27 of -the housings being fed with air from the engine compressor through pipes 22 when the device is not in use to prevent fuel and combustion products from flowing through apertured plates 28 into the igniters. The igniters 10 comprise one or more cylindrical catalytic gauzes 12 within a refractory housing 15, the upstream end of the housing 15 being closed by a perforated plate 11 and the downstream end being apertured at 16. In the embodiment of Fig. 2 (not shown), the compressed air is fed into the igniter through a radial passage in the refractory housing. In the embodiment of Fig. 7 (not shown), combustion products and part of the fuel are fed into the housing containing the igniter but the majority of the fuel flows around the igniter casing to be ignited by the combustion of the fuel which flowed through the igniter. In the embodiment of Fig. 4 (not shown), compressed air and fuel are fed through pipes 32 and 33 into the upstream portion of the igniter housing 30 which contains a perforated plate 35 defining with the igniter a mixing chamber 37. The downstream portion of the housing 30 is formed into a gutter of arcuate cross-section to shelter the igniter from the flow of exhaust gases through the engine. In this embodiment the compressed air flows through the device continually. |
