关键词: 燃料喷嘴;燃烧性能;控制;研究

Abstract: In this paper, three typies of fuel nozzle differet in atomization principle are separately tested on a jet engine combustion apparatus to examine their performance. These nozzles are characterized by pressure-swirl,airblast and air-assist pressure-swirl. Experiments show that changing in combustor inlet air velocity can slightly improve exit temperature profile, when whichever nozzle is used, pressure-swirl atomizer has the features of good ignition and flame stabilization, but lower combustion efficiency and higher exit extreme temperature.Compared with pressure-swirl atomizer, airblast atomizer is of higher combustion efficiency, better ignition at high air velocity and poorer at low air velocity, and poorly lean fuel-extinction limit; Air-assist pressure-swirl atomizer is of higher combustion effeciency, better ignition and flame stabilization, and with easy to control the position of exit extreme temperature.

Key words: Fuel nozzle;Combustion performance;Control;Research