NOx对甲烷点火延迟时间影响的数值研究

doi:10.3969/j.issn.1000-1093.2017.03.009

兵工学报 ›› 2017, Vol. 38 ›› Issue (3): 476-482.doi: 10.3969/j.issn.1000-1093.2017.03.009

NOx对甲烷点火延迟时间影响的数值研究

邓同晔^1,2，徐庆尧¹，沈双晏¹

（1.装备学院激光推进及其应用国家重点实验室，北京 101416； 2.南京理工大学机械工程学院，江苏南京 210094）

收稿日期:2016-07-08 修回日期:2016-07-08 上线日期:2017-04-24
作者简介:邓同晔(1991—), 男, 硕士研究生。E-mail: njustdty@outlook.com
基金资助:
国家自然科学基金项目（11372356）

Numerical Investigation on the Effect of NOx on Ignition Delay of Mathane

DENG Tong-ye^1,2, XU Qing-yao¹, SHEN Shuang-yan¹

(1.State Key Laboratory of Laser Propulsion & Application，Equipment Academy，Beijing 101416，China;2.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)

Received:2016-07-08 Revised:2016-07-08 Online:2017-04-24

摘要/Abstract

摘要： 点火延迟时间是超燃冲压发动机设计中的重要参数之一。为研究氮氧化物（NOx）对甲烷点火延迟时间的影响，在GRI-Mech 3.0机理的基础上添加R326、R327、R328 3个反应，利用CHEMKIN 化学动力学软件，对CH₄/O₂/NOx/Ar混合气体的点火过程进行数值计算，并将数值计算数据与文献\[6\]中的实验数据进行了对比。通过对比发现添加3个反应之后，GRI-Mech 3.0机理能够较好地模拟含NOx时甲烷的点火过程。研究结果表明：NO₂缩短甲烷点火延迟时间的程度比N₂O缩短甲烷点火延迟时间的程度大；CH₄/O₂/NOx/Ar预混气体在富氧条件下（燃气当量比为0.5）的点火延迟时间要比贫氧条件下（燃气当量比为2.0）的点火延迟时间短。

关键词: 兵器科学与技术, 点火延迟时间, 氮氧化物, 甲烷, 数值计算

Abstract: Ignition delay time is an important parameter in the design of scramjet engine. Three reactions are added to the GRI-Mech 3.0 mechanism to investigate the effect of NOx on ignition delay of methane. The ignition process of CH₄/O₂/NOx/Ar mixtures is numerically calculated using the CHEMKIN chemical kinetics software, and the numerical calculation data were compared with the experimental data in Ref.\[6\]. It is found that the GRI-Mech 3.0 mechanism could well simulate the ignition process of methane with NOx when the reactions R326,R327 and R328 are added. Numerically calculated result shows that the addition of NO₂, to a lesser extent of N₂O, leads to the reduction in the ignition delay time of CH₄/O₂/Ar mixtures, which is in good agreement with the experimental result of Mathieu, and the ignition delay time of CH₄/O₂/NOx/Ar mixtures under the oxygen poor condition (fuel-air equivalence ratio of 0.5) is shorter than that under the fuel rich condition (fuel-air equivalence ratio of 2.0). Key

Key words: ordnancescienceandtechnology, ignitiondelaytime, NOx, methane, numericalcalculation

中图分类号:

TK16

邓同晔，徐庆尧，沈双晏. NOx对甲烷点火延迟时间影响的数值研究[J]. 兵工学报, 2017, 38(3): 476-482.

DENG Tong-ye, XU Qing-yao, SHEN Shuang-yan. Numerical Investigation on the Effect of NOx on Ignition Delay of Mathane[J]. Acta Armamentarii, 2017, 38(3): 476-482.

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NOx对甲烷点火延迟时间影响的数值研究

Numerical Investigation on the Effect of NOx on Ignition Delay of Mathane

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