An implicit relation between temperature and reaction rate in the SLFM

An implicit relation between temperature and reaction rate in the SLFM
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SLFM 中温度和反应速率之间的隐式关系

DOI:
10.1063/2.1101203
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发表时间:
2011
影响因子:
3.4
通讯作者:
Guodong Jin
Guodong Jin
中科院分区:
工程技术4区
文献类型:
--
作者:
Jian Zhang;Guo-wei He;Guodong Jin

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阿耳忒弥斯定律意味着反应速率是温度的连续函数。然而,稳态层流小火焰模型(SLFM)没有明确给出这种函数关系。本研究解决了这种关系在SLFM。发现反应速率在混合分数空间中是不连续的。因此,SLFM无法预测局部灭绝和再点火。此外,我们用“S$曲线”的不稳定分支来填补稳定燃烧分支和熄灭分支之间差距,发现这种修正导致反应速率对温度的连续依赖性。因此,改进的超线性调频模型可以描述局部熄灭和再点火。
The Arrhenius law implies that reaction rate is a continuous function of temperature. However, the steady laminar flamelet model (SLFM) does not explicitly give this functional relationship. The present study addresses this relation in the SLFM. It is found that reaction rate is not continuous in the mixture-fraction space. As a result, the SLFM is unable to predict local extinction and reignition. Furthermore, we use the unstable branch of the ``$S$-curve" to fill the gap between steady burning branch and extinction one, and find that this modification leads to a continuous dependent of reaction rate on temperature. Thus the modified SLFM can describe the local extinction and reignition.
DOI: --
发表时间: 2001
期刊: --
影响因子: --
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