CAJ | 학술논문

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%。
위고찰련염은류기대주와연소실적류장화성능적영향，응용고단수자양궤계통진행료설계화수치계산。재전형주와연소실삼유모형상첨가료련염은류기，분석료2개연소실모형재불동진구마혁수조건하적랭태류장결구화총압손실。선취진구마혁수위0.2적공황，대2개모형적연소류장진행대비，분석료련염은류기대연소실성능적영향。결과표명：주와연소실적NOx배방저우보통구형연소실；첨가련염은류기후，주와구능경호지실현여주류구적물질교환，피면인주류속도과쾌，절단주와구여주류구적능량전체；연소효솔종97%제고지99%，출구온도분포계수종0.92강위0.49；2개모형각랭태공황적총압손실야분별증가2%~12%。
In order to analyze the influences of a device for flame joint and flow stabilization on the flow field and performance of a trapped vortex combustor, a high end digital prototyping system is used for design and numerical calculation. A device for flame joint and flow stabilization is added on a typical three-dimensional trapped vortex combustor model. The cold flow field structure and total pressure loss regarding the two models are carried out in conditions of different inlet Mach numbers. Under the working condition of which the Mach number is 0. 2,the combustion flow field of the two models are taken for analysis and comparison,and the influences of the device for flame joint and flow stabilization on the chamber performance are analyzed. The simulation results show that:the NOx-emission level of the trapped vortex combustor is lower than those of normal chambers;after added the device for flame joint and flow stabilization,the energy transfer between the trapped vortex area and the mainstream area is increased instead of being cut by the excessive mainstream speed;the combustion efficiency is improved from 97% to 99% and the outlet temperature distribution is decreased from 0 . 92 to 0 . 49;the total pressure loss of the cold flow field of the two models is increased by 2%-12%.