天然气塔式同轴分级燃烧室掺氢燃烧特性数值模拟研究  

Numerical Simulation Study on Hydrogen-mixing Combustion Characteristics of Natural Gas Tower Coaxial Graded Combustor

作　　者：王志强 刘潇 杨文涛 吕光普 朱浩然 郑洪涛[1] Wang Zhiqiang;Liu Xiao;Yang Wentao;LüGuangpu;Zhu Haoran;Zheng Hongtao(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《燃气轮机技术》2024年第1期26-36,共11页Gas Turbine Technology

基　　金：中央高校基本科研业务费项目(3072022QBZ0304)。

摘　　要：为了解天然气掺氢对贫预混燃气轮机性能的影响,采用Chemkin-pro研究了燃料的化学反应动力学特性,对比了不同当量比、掺氢比下的绝热火焰温度、层流火焰传播速度及点火延迟时间,结果表明掺氢能缩短燃料点火延迟时间,增加绝热火焰温度及提高火焰传播速度。进一步以天然气塔式同轴分级燃烧室为研究对象,研究了掺氢比对燃烧室燃烧场分布及燃烧效率、总压损失系数、温度分布不均匀度、一氧化碳及氮氧化物排放量等性能参数的影响。结果表明,随着掺氢比的增加,燃烧效率上升,总压损失系数增加,温度分布不均匀度下降,一氧化碳排放量下降,氮氧化物排放量增加。掺氢比在35%时燃烧室发生回火。在30%~35%掺氢比范围内,燃烧室性能参数变化较大。其中,总压损失系数增幅为24.74%,温度分布不均匀度降幅为31.11%,氮氧化物排放量增幅为416.12%。In order to understand the effect of hydrogen-mixing of natural gas on the performance of lean premixed gas turbines,Chemkin-pro was used to study the chemical reaction kinetic characteristics of fuel,and the adiabatic flame temperature,laminar flame propagation velocity and ignition delay time under different equivalent ratios and hydrogen-mixing ratios were compared.The results show that hydrogen-mixing can shorten the ignition delay time of fuel,increase the adiabatic flame temperature and flame propagation speed.Further,the effects of hydrogen-mixing ratio on combustion field distribution,combustion efficiency,total pressure loss coefficient,outlet temperature distribution factor,carbon monoxide and nitrogen oxide emission were studied.The results show that with the increase of hydrogen-mixing ratio,the combustion efficiency increased,the total pressure loss coefficient increased,the outlet temperature distribution factor decreased,the carbon monoxide emission decreased,and the nitrogen oxide emission increased.Combustion chamber tempering occurd when hydrogen-mixing ratio is 35%.In the range of 30%-35%hydrogen-mixing,the performance parameters of the combustor changed greatly.The total pressure loss coefficient increased by 24.74%,the outlet temperature distribution factor decreased by 31.11%,and the nitrogen oxide emission increased by 416.12%.

关 键 词：燃气轮机 掺氢比 化学反应动力学特性 回火 燃烧场 燃烧室性能 

分 类 号：TK16[动力工程及工程热物理—热能工程]