以改烧低热值高炉煤气为研究目的,针对单头部中心分级旋流燃烧室,采用数值模拟方法开展燃气轮机燃烧室喷嘴结构改进研究,分析了燃烧室各级喷嘴面积对燃烧室性能的影响。结果表明：随着主燃级喷嘴面积的增大,燃烧室出口温升在1199-1212K之间变化,OTDF基本不变；燃烧室出口NOx和CO的排放整体上呈先减小后增大的变化规律,NOx排放量均在13ppm以下,CO排放量在254-445ppm之间变化,CO排放量较高；燃烧效率先增大后减小。随着预燃级喷嘴面积的增大,燃烧室温升由1208K降低至1054K,OTDF在0.017-0.030之间变化；燃烧室出口NOx排放变化较小且均在10ppm以下,燃烧室出口CO排放呈明显上升的趋势,由254ppm增加至1289ppm；燃烧效率由99.85%降低至99.23%。随着值班级喷嘴面积的增大,温升变化在1206K-1214K之间,OTDF值在0.025左右；燃烧室出口NOx排放变化很小且均在9ppm以下,燃烧室出口CO排放呈明显下降趋势；燃烧效率基本不变。

For the purpose of switching to low calorific value blast furnace gas, a numerical simulation method was used to improve the nozzle structure of the gas turbine combustion chamber, and the influence of nozzle area on the performance of the combustion chamber was analyzed. The results show that with the increase of the nozzle area of the main combustion stage, the temperature rise of the combustion chamber outlet changes between 1199-1212K, and the OTDF is basically unchanged. NOx and CO emissions at the combustion chamber outlet show an overall pattern of decreasing and then increasing. The emission of NOx was below 13ppm, and the emission of CO was between 254-445ppm, and the emission of CO was relatively high. The combustion efficiency increases first and then decreases. With the increase of the nozzle area of the precombustion stage, the temperature rise of the combustion chamber decreases from 1208K to 1054K, and the OTDF varies between 0.017 and 0.030. NOx emission at the combustion chamber outlet change

TK221

国防基础科研计划资助(JCKY2021130B039)