主燃孔位置对基于RQL高温升燃烧室流动与燃烧特性影响的数值模拟

为将富油燃烧/快速淬熄/贫油燃烧（RQL）用于高温升燃烧室设计，以实现温升与排放的良好统一，对不同主燃孔位置下 的单头部矩形燃烧室流动、淬熄区气流混合、燃烧和排放特性进行数值模拟。结果表明：燃烧室中心回流区的长度和高度随着主 燃孔轴向距离的增大而增大。随着主燃孔轴向距离的增大，主燃孔射流深度增加，射流角度逐渐向下游偏转，导致淬熄区内气流 的混合效果减弱；随着主燃孔位置的后移，富油区内的当量比显著增大，导致CO和碳烟的生成量迅速增加，淬熄区内的沿程高温 区域面积逐渐缩小，燃烧效率逐渐降低。当X/H=0.7时，燃烧室沿程NO生成量始终处在较大值；而当X/H=0.9时，燃烧室沿程NO 生成量始终处于较小值，但CO的生成量增大。

Numerical Simulation on the Influence of the Primary Holes Position on Flow and Combustion Characteristics of High Temperature Rise Combustor Based on RQL

In order to apply Rich-burn, Quick-quench, Lean-burn (RQL) technology in the design of high temperature rise combustor to achieve a good unification of temperature rise and emission, numerical simulations were conducted on the flow characteristics, airflow mixing effectiveness in the quench zone, combustion and emission performances of a rectangular single-head combustor with different pri? mary hole positions. The results show that the length and height of the central recirculation zone increase with the increase of the axial dis? tance of the primary holes. At the same time, with the increase of the axial distance of primary holes, the penetration of primary jets increas? es, and the jet angle gradually deflects to downstream, leading to the weakening of the airflow mixing effectiveness in the quench zone. In addition, as the position of the primary holes move back, the equivalence ratio in the rich zone increases significantly, resulting in a rapid increase of CO and soot generation. At the same time, the area of the high-temperature zone along the quench zone gradually decreases and the combustion efficiency also gradually decreases. When X/H = 0.7, the NO generation along the combustor is always at a large value. However, when X/H = 0.9, the NO generation along the combustor is always at a low value, but the CO generation increases.