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弹箭与制导学报 >

2019 , Vol. 39 >Issue 1: 143 - 146

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2019.01.031

甲烷二次燃烧自点火影响机理数值研究

  • 史增凯 ,
  • 席文雄 ,
  • 金星 ,
  • 王伟东
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  • 航天工程大学激光推进及其应用国家重点实验室,北京101416

史增凯(1993-),男,山东菏泽人,硕士研究生,研究方向:超声速气流中的流动和燃烧过程研究。

收稿日期: 2018-03-07

  网络出版日期: 2025-05-21

基金资助

国家自然科学基金(51606220)

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Numerical Study of Methane Auto-ignition Mechanism in Secondary Combustion

  • SHI Zengkai ,
  • XI Wenxiong ,
  • JIN Xing ,
  • WANG Weidong
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  • State Key Laboratory of Laser Propulsion and Application, Space Engineering University, Beijing 101416, China

Received date: 2018-03-07

  Online published: 2025-05-21

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摘要

为研究当量比对二次燃烧自点火的影响机制,忽略复杂流动的影响,利用CHEMKIN软件中零维、均质、完全混合的闭式均相反应器模拟研究了向不同当量比(0.3~0.9)甲烷/空气一次燃烧产物中添加不同量(摩尔分数0.05,0.1)甲烷时的自点火过程。在一定范围内,增加当量比有助于缩短延迟时间。温度敏感性分析表明与CH₃、OH相关的基元反应显著影响自点火过程。

关键词： 二次燃烧; 当量比; 自点火延迟时间; 温度敏感性分析

本文引用格式

史增凯 , 席文雄 , 金星 , 王伟东 . 甲烷二次燃烧自点火影响机理数值研究[J]. 弹箭与制导学报, 2019 , 39(1) : 143 -146 . DOI: 10.15892/j.cnki.djzdxb.2019.01.031

Abstract

In order to study the mechanism of equivalence ratio on the auto-ignition in secondary combustion, the paper ignores the impact of complex flow, using zero-dimensional and closed homogeneous reactor in CHEMKIN to simulate auto-ignition of mixtures which consist of different amounts (0.05, 0.1 mole fraction) of methane and primary combustion products of methane/air which are under different equivalent ratios (0.3~0.9). Within a certain range, increasing the equivalence ratio helps to reduce the delay time. Temperature sensitivity analysis shows that the elementary reactions related to CH3 and OH significantly affect the auto-ignition process.

Key words： secondary combustion; equivalent ratio; auto-ignition delay time; temperature sensitivity analysis

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参考文献

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