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On-line Access: 2022-10-20

Received: 2022-04-19

Revision Accepted: 2022-05-23

Crosschecked: 2022-10-21

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Anna E. SMYGALINA

https://orcid.org/0000-0002-4792-6498

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Journal of Zhejiang University SCIENCE A 2022 Vol.23 No.10 P.838-844

http://doi.org/10.1631/jzus.A2200217


Regimes of near-stoichiometric hydrogen/air combustion under reciprocating engine conditions


Author(s):  Anna E. SMYGALINA, Alexey D. KIVERIN

Affiliation(s):  Joint Institute for High Temperatures of the Russian Academy of Sciences, Moscow 125412, Russia; more

Corresponding email(s):   smygalina-anna@yandex.ru

Key Words:  Hydrogen/air combustion, Reciprocating engine, Knock


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Anna E. SMYGALINA, Alexey D. KIVERIN. Regimes of near-stoichiometric hydrogen/air combustion under reciprocating engine conditions[J]. Journal of Zhejiang University Science A, 2022, 23(10): 838-844.

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Abstract: 
We consider combustion regimes with hydrogen/air mixtures of stoichiometric (29.5% of hydrogen by volume) and sub-stoichiometric (less than 29.5%) compositions in the combustion chamber with parameters presented in the electronic supplementary materials. Pressure histories obtained numerically for combustion regimes of hydrogen/air mixtures of different compositions (29.5%, 26.0%, 24.0%, 22.0%, 20.0%, and 18.0%) are presented in Fig. 1a. Analysis of the data enables three characteristic combustion regimes to be distinguished: (1) detonation, observed for the stoichiometric mixture and originating spontaneously as a result of ignition of the compressed mixture, (2) a fast combustion regime, distinctively observed in the 26.0% (as well as in the 24.0% and 22.0%) mixture where the pressure history is characterized by pressure oscillations of relatively high amplitude and frequency, and (3) a slow combustion regime, realized for 18.0% hydrogen content in the mixture, where the pressure history is characterized by pressure oscillations of relatively low amplitude.

往复式发动机条件下近化学计量的氢气/空气燃烧模式

作者:Anna E. SMYGALINA, Alexey D. KIVERIN
机构:俄罗斯科学院高温联合研究所,俄罗斯莫斯科,125412
目的:采用与火花点火往复式发动机相关的初始条件和参数,对近化学计量氢气/空气混合物在圆柱形燃烧室内运动活塞下的燃烧进行数值研究,并特别研究以强压振荡为特征的氢气燃烧模式是否可以被视为爆震。
创新点:1.明确考虑了在高含氢量的火花点火发动机条件下氢气/空气混合物的燃烧情况。2.根据初始含氢量的不同,燃烧可分为爆燃、快速燃烧和缓慢燃烧三种模式。3.研究证明了以高幅高频压力振荡为特征的快速燃烧模式不能被视为爆震。
方法:1.采用"粗颗粒"数值方法求解二维圆柱坐标系下的纳维-斯托克斯气体动力方程组。2.模拟往复式发动机条件下可燃混合气体的动力学状态。
结论:从输出参数(压力振幅全程的快速傅里叶变换)来看,近化学计量的氢气/空气燃烧与爆震相似。然而,尾气区域的温度不足以使该区域发生自燃,因此不能将该燃烧模式视为爆震。

关键词:往复式发动机;燃烧模式;爆震

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