| H2/CO合成气层流扩散燃烧产物NOx生成机理的数值分析 |
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| 引用本文： | 袁 也,席剑飞,顾中铸,安海洋.H2/CO合成气层流扩散燃烧产物NOx生成机理的数值分析[J].热能动力工程,2017,32(12):102-105. |
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| 作者姓名： | 袁 也 席剑飞 顾中铸 安海洋 |
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| 作者单位： | 南京师范大学 能源与机械工程学院，江苏 南京 210042,南京师范大学 能源与机械工程学院，江苏 南京 210042,南京师范大学 能源与机械工程学院，江苏 南京 210042,南京师范大学 能源与机械工程学院，江苏 南京 210042 |
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| 基金项目： | 国家自然科学基金资助项目（51706107）；江苏省高校自然科学研究面上项目(16KJB470011)；江苏省产学研联合创新资金项目（BY2013001-02） |
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| 摘 要： | 采用Chemkin软件中的OPPDIF(对冲扩散火焰)模型对H_2/CO合成气燃烧产生的NO_x排放特性进行了数值研究,分析了合成气扩散火焰中H_2体积分数对NO_x形成的影响。使用OPT(光学薄辐射)模型考察了辐射散热对模拟火焰的影响,采用GRI-Mech 3.0详细化学反应机理研究了NO_x的生成机制。数值模拟结果表明:非绝热条件下,随着合成气中H_2体积分数的增加,层流对冲扩散火焰的峰值温度单调增加;在绝热条件下,合成气火焰的峰值温度会随H_2体积分数的增加而略微下降;同时,随着H_2体积分数的增加,合成气燃烧产生的NO含量明显增加,其中热力型NO的生成量随H_2体积分数的增加变化明显,主导着NO生成量的变化趋势。
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| 关 键 词： | 合成气 H2 NO 扩散火焰 数值模拟 |
Numerical analysis of formation mechanism for H2/CO syngas laminar diffusion combustion products NOx |
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| YUAN Ye,XI Jian-fei,GU Zhong-zhu and AN Hai-yang.Numerical analysis of formation mechanism for H2/CO syngas laminar diffusion combustion products NOx[J].Journal of Engineering for Thermal Energy and Power,2017,32(12):102-105. |
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| Authors: | YUAN Ye XI Jian-fei GU Zhong-zhu and AN Hai-yang |
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| Affiliation: | College of Energy Source and Mechanical Engineering, Nanjing Normal University, Nanjing, China, Post Code: 210042,College of Energy Source and Mechanical Engineering, Nanjing Normal University, Nanjing, China, Post Code: 210042,College of Energy Source and Mechanical Engineering, Nanjing Normal University, Nanjing, China, Post Code: 210042 and College of Energy Source and Mechanical Engineering, Nanjing Normal University, Nanjing, China, Post Code: 210042 |
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| Abstract: | This paper reports a numerical investigation of H2/CO syngas NOx emission in opposed-flow diffusion flame by using Chemkin. An analysis of how hydrogen fraction influence the NOx emission by changing mole fraction of hydrogen is provided. Optical thin model is applied to consider the influence of radiation heat to the flame, using GRI-Mech 3.0 as reaction mechanism. The computational predictions showed that the flame temperature increases monotonously with H2 fraction increasing. However, the flame temperature under adiabatic condition decreases with hydrogen fraction increasing. Meanwhile, with hydrogen fraction increasing, the NOx emission of syngas flame increases obviously, and the thermal route contributes the largest part of NO emission increasing, leading the variation of NOx emission. |
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| Keywords: | Syngas H2 NO Diffusion flame Numerical research |
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