关键词: 斜流驻涡燃烧室;出口温度分布;值班供油;火焰形态;高温区

Abstract: To deeply understand and grasp the outlet temperature profile characteristics of the mixed-flow trapped vortex combustor by pilot-fueling only， the research on parameters such as outlet radial temperature profile， non-uniformity， and outlet temperature distribution factor （OTDF） and radial temperature distribution factor （RTDF） under different inlet air velocities and fuel/air ratios was carried out. The reason for the change of the outlet temperature profile characteristics was analyzed by combined with the flame morphology in the cavity. The results show that the outlet radial temperature profile at different inlet air velocities and fuel/air ratios is high in the middle， low at both ends， and the temperature peak is at 0.6 times the height of the exit of the combustor. The high temperature zone is generally biased above the outlet center at different inlet air velocities. The high temperature zone is mainly located at the outlet center under different fuel/air ratios. As the inlet air velocity increases， the non-uniformity and OTDF increase， and the high temperature zone shifts from above the outlet center to the center. As the fuel/air ratio increases， the non-uniformity decreases， and OTDF and RTDF basically decrease first and then slowly increase， and the high temperature zone shifts from below the outlet center to above the outlet center. This is closely related to the combustion situation in the cavity， which depends on the fuel distribution， the driving-air mixing effect， the local fuel/air ratio in the cavity， and the location of high temperature products.

Key words: Mixed-flow trapped vortex combustor;Outlet temperature profile;Pilot-fueling;Flame morphology;High temperature zone