| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustion device (16) operating with high combustion efficiency and low emission of carbon monoxide, nitrogen oxide and exhaust gas upon low output and high output operations. SOLUTION: The combustion device includes a mixer assembly (41) having a pilot mixer (42) and a main mixer (44). The pilot mixer includes a pilot fuel injector (58), at least one swirling device (60) and an air splitter (70). The main mixer extends on the periphery of the pilot mixer and includes a plurality of fuel injection ports (98) and a conical air swirling device (110) located upstream the fuel injection ports (98). Upon idling output operation of an engine, the pilot mixer is aerodynamically separated from the main mixer and only air is supplied to the main mixer. Upon high output operation, fuel is also supplied to the main mixer. The conical swirling device of the main mixer accelerates the radial and circumferential mixture of fuel and air.
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