乙烯-空气混合物的层流火焰速度测量和燃烧机理优化

IF 1.4 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Lei Wang, Ruida Hou, Zixing Zhang, Yindong Song
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引用次数: 0

摘要

在大分子烷烃和烯烃的裂解和燃烧过程中,乙烯作为中间组分起着至关重要的作用。本文采用热通量法测量了乙烯-空气混合物的层燃速度。利用误差传播有向关系图(DRGEP)和敏感性分析(SA)简化了乙烯的机理,并利用粒子群优化(PSO)算法优化了骨架机理中选定的 20 个反应的阿伦尼斯预指数因子。最后得到了包括 39 个物种和 85 个反应的乙烯优化机理。火焰速度、点火延迟时间和物种浓度的预测结果与实验数据和其他机理进行了比较,涵盖的温度(298-1725 K)、压力(1-22.8 atm)和当量比(0.5-2.0)范围很广。研究结果表明,优化机制不仅改善了富燃区和低氧环境下层流火焰速度的预测结果,还提高了高压和贫燃区点火延迟时间的预测精度,以及 C2H4 和 H2O 自由基的预测精度。总之,优化后的机制具有更高的准确性和更广泛的适用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Laminar flame speed measurement and combustion mechanism optimization for ethylene–air mixtures

Ethylene plays a crucial role as an intermediate component in the cracking and combustion processes of large molecular alkane and olefins. In this article, the laminar flame speed of ethylene–air mixtures was measured using the heat flux method. The mechanism of ethylene was simplified by utilizing the error propagation directed relationship graph (DRGEP) and sensitivity analysis (SA), and the Arrhenius pre-exponential factors for 20 selected reactions in the skeletal mechanism were optimized using the particle swarm optimization (PSO) algorithm. Finally, an ethylene optimization mechanism including 39 species and 85 reactions was obtained. The prediction results for flame speed, ignition delay time, and species concentration were compared with experimental data and other mechanisms, covering a wide range of temperatures (298–1725 K), pressures (1–22.8 atm), and equivalence ratios (0.5–2.0). The findings demonstrate that the optimization mechanism not only improves the prediction results of laminar flame speed in the rich combustion zone and low oxygen environment but also enhances the prediction accuracy of the ignition delay time at high pressure and in the lean combustion zone, as well as the prediction accuracy of C2H4 and H2O radicals. In conclusion, the optimized mechanism exhibits higher accuracy and broader applicability.

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来源期刊
自引率
11.10%
发文量
111
期刊介绍: Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).
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