航改燃机多点喷射贫预混燃烧室燃料分级实验研究  

Experimental study on fuel-staging in a lean premixed combustor with multi-points injection for aeroderivative gas turbine

作　　者：孙付军 潘江华 郭璐华 李洁 马宏宇 索建秦[1] SUN Fujun;PAN Jianghua;GUO Luhua;LI Jie;MA Hongyu;SUO Jianqin(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China;AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China;AECC Shenyang Engine Research Institute,Shenyang 110015,China)

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072 [2]中国航发湖南动力机械研究所,湖南株洲412002 [3]中国航发沈阳发动机研究所,辽宁沈阳110015

出　　处：《推进技术》2024年第3期184-193,共10页Journal of Propulsion Technology

基　　金：国家科技重大专项(2017-Ⅲ-0006-0031,2017-Ⅲ-0002-0026)。

摘　　要：为保证多点喷射贫预混燃烧室在50%~100%载荷工况范围的NO_(x)和CO排放量满足排放标准,本文实验研究了燃料分级数及不同工况、进口压力、进口温度下燃料分级比例对七喷嘴燃烧室NO_(x)和CO排放的影响规律。结果表明:主模燃料不分级方案,50%~60%载荷工况CO排放量较高而不满足排放标准;主模燃料分两级方案,50%~100%载荷工况范围内NO_(x)和CO排放量均满足f_(NOx)≤25×10^(-6),fCO≤50×10^(-6)(@15%O_(2))的排放标准,且70%工况是打开主模第二级燃料的过渡工况点。另外随着进口压力和温度升高,能同时满足NO_(x)和CO排放标准的R_(pilot)(副模燃料质量流量与总燃料质量流量之比)范围逐渐缩小,且NO_(x)排放量与进口压力关系为F_(NOx)∝p30.44。因此采用主模燃料两级分级方案且适当调节R_(pilot),本文多点喷射贫预混燃烧室NO_(x)和CO能满足目前航改地面燃机燃烧室排放要求。To ensure that the NO_(x) and CO emissions of the multi-points injection lean premixed combustor in the range of 50%~100%loads all meet the emission demands,the effects of fuel-staging number,fuel-staging ratios under different loads,inlet pressure and inlet temperature on NO_(x) and CO emissions for seven-injectors combustor were studied experimentally.The experimental results indicate that when adopting no fuel-staging scheme for main fuel,the CO emissions under 50%~60%loads are both high and do not meet the standard.With the double fuel-staging scheme for main fuel,the emissions of NO_(x) and CO within the range of 50%~100%loads all meet the demands of f_(NOx)≤25×10^(-6),f_(CO)≤50×10^(-6)(@15%O_(2)),and 70%load is the transition load point for opening the second-stage main fuel.As the inlet pressure and temperature increasing,the range of R_(pilot)(R_(pilot) is the ratio of pilot fuel mass flow to total fuel mass flow),at which the NOx and CO could both satisfy the emissions demands,gradually decreased.In addition,the fNO_(x) relation with p_(3) is shown as f_(NOx)∝p_(3)^(0.44).Therefore,with the double fuel-staging scheme for main fuel and appropriate adjustment of R_(pilot),the NO_(x) and CO emissions of the multi-points injection lean premixed combustor in this paper can meet demands for aeroderivative and land-based gas turbine combustor at present.

关 键 词：航改燃机 多点喷射 贫预混燃烧 低污染 燃料分级 

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]