基于LES-FGM方法的部分预混湍流燃烧中间组分模拟

张玮杰; 王金华; 胡光亚; 李德立; 王子淇; 黄佐华

doi:10.21656/1000-0887.440068

基于LES-FGM方法的部分预混湍流燃烧中间组分模拟

doi: 10.21656/1000-0887.440068

西安交通大学能源与动力工程学院，西安 710049

基金项目:

国家自然科学基金项目 52206169

详细信息

通讯作者:
张玮杰(1991—)，男，助理教授，博士(通讯作者. E-mail: wjzhang@xjtu.edu.cn)

中图分类号: O357
计量
- 文章访问数: 520
- HTML全文浏览量: 214
- PDF下载量: 78
- 被引次数: 0
出版历程
- 收稿日期: 2023-03-16
- 修回日期: 2023-05-04
- 刊出日期: 2023-09-01

Modelling Intermediate Species in Partially Premixed Turbulent Combustion Based on the LES-FGM Method

School of Energy and Power Egineering, Xi'an Jiaotong University, Xi'an 710049,P.R.China

摘要

摘要: 基于FGM建表燃烧模型对德国达姆施塔特工业大学的MRB部分预混湍流火焰开展大涡模拟，并对比研究了预混和部分预混FGM建表方法对模拟的影响.结果表明，不同建表方法对MRB火焰结构、速度分布和主要组分分布等影响较小，但部分预混建表能显著提升中间组分CO和H₂的模拟可靠性.其根本原因是部分预混建表使用了对冲火焰模型，能够充分引入燃空混合过程对中间组分的影响.通过添加额外的组分输运方程可提升预混火焰建表对中间组分模拟的可靠性，且前人提出的拉伸作用在该火焰中影响较小.该研究为基于建表方法的部分预混湍流燃烧准确模拟提供了重要参考.
- 湍流燃烧 /
- 部分预混 /
- LES-FGM /
- 燃烧中间组分 /
- 燃空混合
Abstract: The LES of partially premixed turbulent flame MRB in TU Darmstadt was conducted based on the flamelet-tabulated combustion model FGM, and effects of premixed and partially premixed tabulations on the modelling results were studied. The results show that, different methods of tabulation exhibit limited influences on the predictions of the flame structure, velocity, and major species, but using a partially premixed tabulation largely improves the reliability of modelling intermediate minor species CO and H₂. The underlying reason lies in a better inclusion of the fuel-air mixing effects through the partially premixed tabulation, which is built based on laminar counter-flow flames. Adding extra transport equations for the intermediate species improves the predictions of intermediate species, especially given a premixed tabulation adopted; meanwhile, the stretch effects in this turbulent flame are ignorable. The results are significant to guide the high-fidelity simulation of partially premixed turbulent flames based on the flamelet-tabulated combustion model.
- turbulent combustion /
- partially premixed /
- LES-FGM /
- combustion intermediate species /
- fuel-air mixing

HTML全文

图 1 MRB燃烧器示意图及其湍流入口设置

注为了解释图中的颜色，读者可以参考本文的电子网页版本，后同.

Figure 1. Schematic of the MRB burner and its turbulent inlets

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图 2 不同建表方法的𝒴源项云图和火焰面分布示意

Figure 2. The source term of 𝒴 and distribution of flamelets based on different methods of tabulation

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图 3 计算域和网格

Figure 3. The computation domain and mesh

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图 4 MRB26b模拟结果的控制变量分布

Figure 4. Simulated control variable distributions of MRB26b

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图 5 速度、温度和主要组分LES与实验结果对比

Figure 5. Comparisons of LES and experiment results in terms of velocity, temperature and major species

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图 6 中间组分CO和H₂LES与实验结果对比

Figure 6. Comparisons of LES and experiment results in terms of intermediate species CO and H₂

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图 7 中间组分CO和H₂质量分数的控制变量条件分布

Figure 7. Control variable conditioned mass fraction distributions of intermediate species CO and H₂

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图 8 FP和CF表格中CO₂、CO和H₂质量分数分布

Figure 8. Mass fraction distributions of CO₂, CO and H₂ in FP and CF tabulations

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