Numerical investigation and prediction models for methanol-air laminar flame speed

YANG Xiehe; SHEN Wenfeng; ZHANG Yang; ZHANG Hai; ZHANG Jiansheng; LYU Junfu

doi:10.11949/0438-1157.20181496

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Numerical investigation and prediction models for methanol-air laminar flame speed

更新时间：2026-07-24

- Numerical investigation and prediction models for methanol-air laminar flame speed
- CIESC Journal Vol. 70, Issue 8, Pages: 3011-3020(2019)
- 作者机构：
  
  清华大学能源与动力工程系,热科学与动力工程教育部重点实验室，北京 100084
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20181496
  CLC： TK 16
- Received：01 December 2018，
  
  Revised：2019-02-03，
  
  Online First：24 July 2026，
  
  Published：05 August 2019
- 稿件说明：
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杨协和, 沈文锋, 张扬, 张海, 张建胜, 吕俊复. 甲醇-空气层流火焰速度的数值研究和预测模型[J]. 化工学报, 2019, 70(8): 3011-3020

YANG Xiehe, SHEN Wenfeng, ZHANG Yang, ZHANG Hai, ZHANG Jiansheng, LYU Junfu. Numerical investigation and prediction models for methanol-air laminar flame speed[J]. CIESC Journal, 2019, 70(8): 3011-3020
杨协和, 沈文锋, 张扬, 张海, 张建胜, 吕俊复. 甲醇-空气层流火焰速度的数值研究和预测模型[J]. 化工学报, 2019, 70(8): 3011-3020 DOI： 10.11949/0438-1157.20181496.

YANG Xiehe, SHEN Wenfeng, ZHANG Yang, ZHANG Hai, ZHANG Jiansheng, LYU Junfu. Numerical investigation and prediction models for methanol-air laminar flame speed[J]. CIESC Journal, 2019, 70(8): 3011-3020 DOI： 10.11949/0438-1157.20181496.

摘要

收集总结分析了现有的甲醇层流火焰速度的实验数据，比较了三种典型的描述甲醇氧化的详细化学反应机理(Li机理、USC Mech-Ⅱ和Burke机理)对层流火焰传播速度的预测精度。结果表明三种机理均能定性反映甲醇层流火焰速度的变化规律，但在富燃料侧，机理计算值明显高于实验结果。反应动力学分析表明甲醇脱氢反应对层流火焰速度的影响至关重要。根据文献中的最新成果，修正了Li机理中甲醇脱氢反应的速率常数，提高了Li机理对甲醇-空气层流火焰速度的预测精度。针对工程需求，给出了两个甲醇层流火焰速度的快速预测模型，经过校核，所提出的预测模型能够较为准确地预测不同初始温度和压力下甲醇层流火焰速度。

Abstract

The experimental data of the existing laminar flame velocity of methanol were collected and analyzed. The three typical chemical reaction mechanisms describing the oxidation of methanol (Li mechanism

USC Mech-Ⅱ and Burke mechanism) were compared to predict the propagation velocity of laminar flame. Laminar flame speed is an intrinsic property of a combustible mixture. In the present study

the validities and accuracies of three different chemical kinetic models (including Li scheme

USC Mech Ⅱ scheme and Burke scheme) on their predictions of laminar methanol-air flame speed were verified using newly-reported experimental data in the literature. The results show that the tested three kinetic schemes were able to qualitatively characterize the variation of the laminar flame speed of methanol-air mixtures. However

quantitatively

remarkable over-predictions were found between the computed laminar flame speed and experimental ones of fuel-rich mixtures. Consequently

reaction sensitivity analysis and reaction rate analysis were conducted in order to figure out the reason for the discrepancy. As per the kinetic analysis

the H-abstraction of methanol was found to be of great importance to the laminar flame speed. Consequently

the H-abstraction in Li scheme was updated using the newly-reported data

and the predictions of laminar flame speed using the modified Li scheme were greatly improved

especially on the fuel-rich side. In the engineering calculation

a quick estimation of the laminar flame speed with an acceptable accuracy is desired. Motivated by this demand

two empirical prediction correlations for methanol-air laminar flame speed were proposed. The predictions using the two correlations were in good agreement with the reported experimental data at different initial mixture temperatures and pressures. The calculation of the laminar flame speed of methanol-air mixtures using the proposed correlations is much faster than detailed modeling using full kinetic model so that it will save a large amount of computation resources in the engineering calculation.

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references

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