燃气轮机燃烧室预混喷嘴排放性能的试验和数值研究  

Experiment and Numerical Study on Emission Characteristics of Premixing Fuel Nozzle in Gas Turbine Combustor

作　　者：赵玮杰[1,2] 于宗明 贺红娟[1] 艾育华[1] 王岳[1,2] ZHAO Wei-jie;YU Zong-ming;HE Hong-juan;AI Yu-hua;WANG Yue(Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《推进技术》2020年第2期362-371,共10页Journal of Propulsion Technology

基　　金：国家自然科学基金(51406200)。

摘　　要：为了研究当量比、值班燃料量和压力对燃气轮机燃烧室预混喷嘴排放指标的影响,在环境压力下按照等速模化原理进行了燃烧室预混喷嘴的燃烧试验,基于化学反应网络法构建了污染物预测模型,开展了试验和数值对比研究。结果表明:在带值班燃料的情况下该预混喷嘴当量比φ在0.35~0.5时可满足国标排放要求,但是值班燃料量增大会使NOx排放升高;在φ<0.4时,压力对纯预混燃烧NOx生成无影响,φ>0.4时,NOx会随压力升高而增多;带有值班燃料的预混燃烧时,NOx对压力变化敏感,压力升高导致NOx增多;该预混喷嘴混合性能对空气流速不敏感、燃料兼容性强,排放达标当量比范围宽,经进一步设计开发后有潜力应用于燃气轮机低排放燃烧室中。该化学反应器网络模型依赖经验较少,当值班燃料比例≤0.17时,对污染物预测与试验数据符合较好。In order to study the effects of equivalence ratio,pilot fuel flowrate,and pressure on emission characteristics of premixing fuel nozzle in gas turbine combustor,combustion experiment on emission of premixing fuel nozzle were conducted at atmospheric pressure,and an emission prediction model based on chemical reactor networks was proposed.The experimental and numerical results indicated that the nozzle would meet the low NOx emission standard at equivalence ratios from 0.35 to 0.5,but increasing pilot fuel flowrate would lead NOx emission to increase.The increase of pressure have no effect on NOx emission of pure premixed combustion atφ<0.4,otherwise,NOx would rise with the increasing pressure.NOx emission of premixed combustion with pilot flame was sensitive to pressure change and would increase as pressure increased.The premixing fuel nozzle,the mixing performance of which is insensitive to air velocity,which has strong fuel compatibility and a wide range of equivalence ratio to meet emission limit,has the potential to be used in low emission combustors of gas turbines after further development.The chemical reactor networks(CRN)model presented relies less on experience and the emission prediction of which is in good agreement with the experimental data when the ratio of pilot fuel to total fuel is no greater than 0.17.

关 键 词：低排放 燃烧室 预混燃烧 化学反应器网络 燃气轮机 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]