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以涡轮级间燃烧室(ITB)应用于涡轴发动机为研究平台,根据ITB的应用环境,采用凹腔驻涡燃烧室作为涡轮级间燃烧室,设计加工了全环凹腔驻涡燃烧室试验件,并进行了性能试验研究.试验结果表明:该燃烧室的贫油点火边界余气系数为10.2,降低驻涡凹腔体内外压差有利于点火;与常规燃烧室相比,燃烧室的燃烧效率偏低,但燃烧效率随进口温度的升高逐步加大;燃烧室的总压恢复系数较小,进口温度对燃烧室的总压恢复系数影响不大;燃烧室出口温度场分布较好,出口温度分布系数(OTDF)随进口温度的升高而减小;随着进口温度的提高,火焰筒壁温会局部偏高,火焰筒的冷却设计需优化改进.
Based on ITB’s application environment, a turbulent intercooled combustion chamber (ITB) was used as a turbo-stage intercooled combustion chamber to design and process a full-annulus reentrant eddy chamber test The experimental results show that the residual gas levitation coefficient at the lean oil ignition boundary of the combustion chamber is 10.2, reducing the pressure difference between the inside and the outside of the reentrant vortex chamber is conducive to ignition. Compared with the conventional combustion chamber, The combustion efficiency is low, but the combustion efficiency gradually increases with the increase of inlet temperature. The total pressure recovery coefficient of the combustion chamber is small, and the inlet temperature has little effect on the total pressure recovery coefficient of the combustion chamber. , The outlet temperature distribution coefficient (OTDF) decreases with the increase of inlet temperature. With the increase of inlet temperature, the wall temperature of the flame tube will be locally high, and the cooling design of the flame tube needs to be optimized and improved.