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一、引言 紊流火焰扩张角已有不少实验研究,但实验条件不完全相同,实验结果也不一致。例如气流温度和余气系数对火焰角的影响趋势有两种完全相反的结论。近几年来,有些人还进行紊流火焰扩张计算,其结果与文献[2]的实验数据大致相符。这些理论计算虽然取得一定的成绩,但还未解决问题。为了进一步探讨火焰角的变化规律,本文用数值解方法计算二元管内紊流火焰扩张。本文计算采用了修改的EBU燃烧模型和混合长度紊
I. INTRODUCTION There have been many experimental studies on the turbulent flame expansion angle. However, the experimental conditions are not exactly the same and the experimental results are also inconsistent. There are, for example, two diametrically opposed conclusions as to the influence of the air temperature and the residual coefficient on the influence of the flame angle. In recent years, some people also conducted turbulent flame expansion calculations, the results generally agree with the experimental data [2]. Although these theoretical calculations have achieved some success, they have not yet solved the problem. In order to further explore the variation law of flame angle, this paper uses the numerical solution method to calculate the turbulent flame expansion in the binary pipe. In this paper, a modified EBU combustion model and mixed length turbulence are used