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Journal of Projectiles, Rockets, Missiles and Guidance >

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

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

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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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

Cite this article

SHI Zengkai , XI Wenxiong , JIN Xing , WANG Weidong . Numerical Study of Methane Auto-ignition Mechanism in Secondary Combustion[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2019 , 39(1) : 143 -146 . DOI: 10.15892/j.cnki.djzdxb.2019.01.031

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