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

doi:10.3969/j.issn.1000-1093.2017.03.009

Abstract

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

CLC Number:

TK16

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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第38卷
第3期2017 年3月兵工学报ACTA
ARMAMENTARIIVol.38No.3Mar.2017

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