In order to achieve the good unification of combustion performance and low emission of high temperature rise combustor, RQL technology was applied to the design of high temperature rise combustor in this paper. Three-dimensional physical models of combustor were set up by referring to the structure and size of experimental model, and the influence of primary holes spacing on the flow and combustion characteristics were studied by using simulation under the conditions of room temperature and atmospheric pressure. The simulation results show that with the increase of primary holes spacing, the angle of primary jets gradually inclines to the upstream, and the vortex centers of local recirculation in rich zone approach to the primary jets. Meanwhile, the number of local recirculation zones in the quench zone also varies with the primary holes spacing. The optimum design of primary holes spacing not only improves the mixing effectiveness of airflow in the quench zone, but also enhances the combustion in rich zone. The optimum holes spacing is related to the combustor height and the momentum flux ratio of primary jets to mainstream. In addition, under the optimum structure of primary holes spacing (Case-3 model), the range of local hot spots at outlet was smallest, the combustion efficiency and the emission index of NO at the equilibrium of kinetic rate of chemical reaction were about 0.06% higher and 12% lower than the other two models, but the formation of soot and CO along the rich zone were slightly higher.

为了实现高温燃烧室燃烧性能与低排放的良好统一，本文将RQL技术应用于高温升燃烧室的设计。参考实验模型的结构和尺寸建立了燃烧室三维物理模型，在常温常压条件下，通过仿真研究了一次孔间距对流动和燃烧特性的影响。模拟结果表明，随着主孔间距的增加，主射流角度逐渐向上游倾斜，富集区局部再循环涡中心向主射流逼近。同时，淬火区局部回流区的数量也随着一次孔距的变化而变化。一次孔间距的优化设计，不仅提高了急冷区气流的混合效率，而且增强了富区的燃烧。最佳孔距与燃烧室高度和主射流与主流的动量通量比有关。此外，在优化一次孔距结构（Case-3模型）下，出口局部热点范围最小，燃烧效率和化学反应动力学速率平衡时NO的排放指数约为0.06比其他两个模型高 % 和 12%，但沿富集区形成的烟尘和 CO 略高。最佳孔距与燃烧室高度和主射流与主流的动量通量比有关。此外，在优化一次孔距结构（Case-3模型）下，出口局部热点范围最小，燃烧效率和化学反应动力学速率平衡时NO的排放指数约为0.06比其他两个模型高 % 和 12%，但沿富集区形成的烟尘和 CO 略高。最佳孔距与燃烧室高度和主射流与主流的动量通量比有关。此外，在优化一次孔距结构（Case-3模型）下，出口局部热点范围最小，燃烧效率和化学反应动力学速率平衡时NO的排放指数约为0.06比其他两个模型高 % 和 12%，但沿富集区形成的烟尘和 CO 略高。