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为考察联焰稳流器对驻涡燃烧室的流场和性能的影响,应用高端数字样机系统进行了设计和数值计算。在典型驻涡燃烧室三维模型上添加了联焰稳流器,分析了2个燃烧室模型在不同进口马赫数条件下的冷态流场结构和总压损失。选取进口马赫数为0.2的工况,对2个模型的燃烧流场进行对比,分析了联焰稳流器对燃烧室性能的影响。结果表明:驻涡燃烧室的NOx排放低于普通构型燃烧室;添加联焰稳流器后,驻涡区能更好地实现与主流区的物质交换,避免因主流速度过快,切断驻涡区与主流区的能量传递;燃烧效率从97%提高至99%,出口温度分布系数从0.92降为0.49;2个模型各冷态工况的总压损失也分别增加2%~12%。
In order to investigate the influence of the joint flame stabilizer on the flow field and performance in the vortex combustor, the design and numerical calculation were carried out by using the high-end digital prototype system. In the typical three-dimensional model of the trapped vortex combustor, a double-flame combustor was added to analyze the cold flow field structure and total pressure loss of the two combustion chamber models under different inlet Mach number. The condition of inlet Mach number 0.2 is selected, the combustion flow field of the two models is compared, and the influence of the combined flame stabilizer on the performance of the combustion chamber is analyzed. The results show that the NOx emission in the combustion chamber is lower than that of the conventional combustion chamber. After adding the co-flame stabilizer, the vortex chamber can better exchange the material with the main flow area and prevent the main flow rate from being cut off The energy transfer from the vortex zone to the main zone was improved; the combustion efficiency increased from 97% to 99% and the outlet temperature distribution coefficient decreased from 0.92 to 0.49. The total pressure loss of each model in cold condition also increased by 2% ~ 12% respectively.