| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fuel nozzle preventing decline in combustion efficiency due to adhesion of fuel to a pilot flare of a staging type fuel nozzle, generation of smoke, deterioration of a dilution limit and decline in combustion efficiency due to mixing of air fuel mixture of fuel and air of a pilot fuel injection part and air passed through a main fuel injection part. <P>SOLUTION: In the fuel nozzle, a gas flow passage annuarly surrounding the fuel injection part is formed by a throat part and a flow passage area expansion part located downstream of the throat part. A space between the throat part and the flare is formed to have a recessed shape like a step in which the flow passage area is rapidly expanded, and a recirculating air flow is formed in the recessed region. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
