等离子体对CH4-空气着火特性的影响因素分析  

Analysis of the influencing factors of plasma on the ignition characteristics of CH4-air

作　　者：王美琪 陈雷[1] 曾文[1] 裴欢 刘宇[1] 杨昆 WANG Mei-qi;CHEN Lei;ZENG Wen;PEI Huan;LIU Yu;YANG Kun(Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aviation Propulsion System,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室,沈阳110136

出　　处：《沈阳航空航天大学学报》2020年第6期37-42,共6页Journal of Shenyang Aerospace University

基　　金：中国航空动力基金(项目编号:6141B090540);辽宁省教育厅基础研究项目(项目编号:JYT19059);国家自然科学基金(项目编号:51676132)。

摘　　要：为了探究非平衡等离子体对甲烷着火延迟时间的影响,建立该燃料的化学反应动力学模型,在GRI-mech 3.0的基础上添加O 3相关的化学反应方程式,编制了等离子体辅助甲烷的燃烧反应机理。对等离子体辅助甲烷的燃烧反应过程进行数值模拟,分析了着火温度、当量比对CH 4/空气/O 3混合气着火延迟时间的影响,得到了非平衡等离子体对甲烷着火延迟时间的影响规律。结果表明:添加O 3后着火延迟时间显著减少;不同当量比下,CH 4/空气/O 3混合气着火延迟时间与着火温度呈线性关系;CH 4/空气/O 3混合气的着火延迟时间随着着火温度的升高逐渐缩短。通过敏感度分析,揭示了非平衡等离子体生成自由基影响甲烷点火的化学反应机理。In order to explore the effect of non-equilibrium plasma on the ignition delay time of methane,a chemical reaction kinetic model of the fuel was established,and the chemical reaction equation related to O 3 was added on the basis of GRI-mech3.0 to prepare the plasma-assisted methane combustion reaction mechanism-The plasma-assisted methane combustion reaction process was numerically simulated,and the ignition temperature,equivalent ratio were analyzed for the ignition delay time of methane/air/O 3mixture-The effect of non-equilibrium plasma on the ignition delay time of methane was obtained-The results show that:after adding O 3,the ignition delay time is significantly reduced;at different equivalence ratios,the logarithm of the ignition delay time of the methane/air/O 3mixture is linear with the ignition temperature;the ignition of the methane/air/O 3 mixture-The delay time gradually decreases with the increase of ignition temperature-Through sensitivity analysis,the chemical reaction mechanism of free radical generation of non-equilibrium plasma affecting the ignition of methane is revealed.

关 键 词：非平衡等离子体 数值模拟 着火延迟时间 敏感性分析 化学反应动力学 甲烷 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]