火焰在氢发动机活塞和汽缸之间狭窄间隙内的传播

IF 0.5 Q4 TRANSPORTATION SCIENCE & TECHNOLOGY

Transport Problems Pub Date : 2023-09-30 DOI:10.20858/tp.2023.18.3.16

Revaz KAVTARADZE, Tamaz NATRIASHVILI, Merab GLONTI, Giorgi CHILASVILI, Otar GELASHVILI, Jumber IOSEBIDZE

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引用次数: 0

摘要

采用三维数学建模的方法，研究了氢活塞发动机活塞与气缸之间狭窄环形间隙内火焰的穿透和传播过程。结合数值实验数据，通过对比实验氢气发动机缸内压力和放热速率的变化，对模型进行了验证。火焰锋面进入间隙的运动是通过混合物中氢组分的瞬时局部值和冷气体(未燃烧的混合物)和燃烧产物的局部温度的变化来分析的。对汽油火焰和氢气火焰的蔓延进行了对比分析。对于氢气发动机燃烧室中热损失比汽油发动机大的现象，以前有不同的作者通过实验证实，但还没有一个可接受的理论解释，这是通过忽略传热在指示间隙中的作用来解释的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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FLAME PROPAGATION IN A NARROW GAP BETWEEN THE PISTON AND CYLINDER OF A HYDROGEN ENGINE

The processes of flame penetration and propagation in a narrow annular gap between the piston and cylinder of a hydrogen piston engine are investigated by the method of 3D mathematical modeling. The model is verified by comparing the changes in pressure and heat release rate in the cylinder obtained from an experimental hydrogen engine, considering the data collected during numerical experiments. The movement of the flame front into the gap is analyzed by changes in the instantaneous local values of the hydrogen fractions in the mixture and the local temperatures of the cold gas (unburned mixture) and combustion products. A comparative analysis of the spread of gasoline and hydrogen flames is carried out. The phenomenon of increasing heat losses in the combustion chamber of a hydrogen engine compared to a gasoline engine, previously confirmed experimentally by different authors and not yet having an acceptable theoretical interpretation, is explained by neglecting the role of heat transfer in the indicated gap.

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来源期刊

Transport Problems TRANSPORTATION SCIENCE & TECHNOLOGY-

CiteScore

1.90

自引率

14.30%

发文量

审稿时长

48 weeks

期刊介绍： Journal Transport Problems is a peer-reviewed open-access scientific journal, owned by Silesian University of Technology and has more than 10 years of experience. The editorial staff includes mainly employees of the Faculty of Transport. Editorial Board performs the functions of current work related to the publication of the next issues of the journal. The International Programming Council coordinates the long-term editorial policy the journal. The Council consists of leading scientists of the world, who deal with the problems of transport. This Journal is a source of information and research results in the transportation and communications science: transport research, transport technology, transport economics, transport logistics, transport law.