钱琳,张洋溢,贾子秀,杨振宇,余波

• 1:中国矿业大学低碳能源与动力工程学院
• 2:西安热工研究院有限公司
• 3:深能库尔勒发电有限公司

摘要(Abstract)：

“双碳”目标下，氨作为零碳燃料有望成为化石燃料的替代品。针对氨燃烧存在的燃烧速度慢、点火能量高、着火延迟显著等问题，基于Shrestha、Mei、Mei-2021、Stagni、CEU-NH_3、Gotama和Glarborg的不同氨燃烧化学反应动力学机理，采用Chemkin模拟研究了初始温度、压力及氧体积分数对氨燃烧特性的影响。结果表明：初始温度增加，氨层流火焰传播速度提高，点火延迟时间降低，有利于氨的着火及燃烧；压力增加层流火焰传播速度降低，但点火延迟时间显著降低，压力增加有利于着火但不利于火焰传播；氧体积分数增大，层流火焰传播速度增大，峰值向稀燃方向移动；并通过敏感性分析揭示了H+O_2=O+OH、NH_2+NO=NNH+OH和NH_2+NO=H_2O+N_2的分支比对火焰传播的正向促进作用，而NH_2+O=HNO+H会抑制火焰传播；反应H+O_2(+M)=HO_2(+M)、NH_3=H+NH_2、HNO=H+NO及NH_2+HO_2=NH_3+O_2在高压下呈高敏感性；HNO和N_iH_i的反应在稀燃燃烧时敏感性系数较高；H_2NO是影响高压低温时点火延迟时间的重要中间组分；通过优化氨燃烧条件调控关键反应路径及反应动力学可改善氨燃烧特性。

关键词(KeyWords)： 反应动力学机理;氨燃烧特性;层流火焰传播速度;点火延迟时间

Abstract:

Keywords:

基金项目(Foundation): 国家留学基金管理委员会2021年青年骨干教师出国研修项目(202106425006)~~

作者(Author): 钱琳,张洋溢,贾子秀,杨振宇,余波

DOI: 10.19666/j.rlfd.202504061

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