Assessment of the Flamelet Generated Manifold method with preferential diffusion modeling for partially premixed hydrogen flames

IF 5.8 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2025-04-15 DOI:10.1016/j.combustflame.2025.114141

E.J. Pérez-Sánchez, E.M. Fortes, D. Mira

{"title":"Assessment of the Flamelet Generated Manifold method with preferential diffusion modeling for partially premixed hydrogen flames","authors":"E.J. Pérez-Sánchez, E.M. Fortes, D. Mira","doi":"10.1016/j.combustflame.2025.114141","DOIUrl":null,"url":null,"abstract":"<div><div>This study presents a systematic analysis of the capabilities of a flamelet model based on Flamelet Generated Manifolds (FGM) to reproduce preferential diffusion effects in partially premixed hydrogen flames. Detailed transport effects are accounted for by including a mixture-averaged transport model when building the flamelet database. This approach adds new terms into the diffusive fluxes of the transport equations of the controlling variables coming from a set of coefficients computed from the data contained in the manifold. The manifold is constructed from the solution of a set of unstretched adiabatic one-dimensional premixed flames within the flammability range using mixture-averaged transport. Special attention is given to the numerical aspects related to the construction of the chemical manifold and how to reduce the numerical errors when evaluating the gradients in composition space required for the fluxes. Finally, a systematic application of the method to simulate laminar hydrogen flames in various canonical configurations is presented from premixed to stratified flames, including the case of a triple flame with different mixing lengths. The results demonstrate that the method describes accurately the flame structure and propagation velocities at a low cost, showing a remarkable agreement with the detailed chemistry solutions for flame structure and propagation speed.</div><div><strong>Novelty and significance statement</strong></div><div>The novelty of the paper lies on the presentation of an extended, robust and comprehensive model for tabulated chemistry incorporating mixture-averaged diffusion. The paper demonstrates the suitability of the model to describe stratified flames when preferential diffusion effects are important by simulating a relevant set of canonical flame configurations. The significance of the paper is that it allows to accurately reproduce a complex phenomenon as it is differential diffusion by the application of a tabulated method, without introducing overheads, and allowing to drastically reduce the computational cost of the simulations.</div></div>","PeriodicalId":280,"journal":{"name":"Combustion and Flame","volume":"277 ","pages":"Article 114141"},"PeriodicalIF":5.8000,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Combustion and Flame","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0010218025001798","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}

引用次数: 0

Abstract

This study presents a systematic analysis of the capabilities of a flamelet model based on Flamelet Generated Manifolds (FGM) to reproduce preferential diffusion effects in partially premixed hydrogen flames. Detailed transport effects are accounted for by including a mixture-averaged transport model when building the flamelet database. This approach adds new terms into the diffusive fluxes of the transport equations of the controlling variables coming from a set of coefficients computed from the data contained in the manifold. The manifold is constructed from the solution of a set of unstretched adiabatic one-dimensional premixed flames within the flammability range using mixture-averaged transport. Special attention is given to the numerical aspects related to the construction of the chemical manifold and how to reduce the numerical errors when evaluating the gradients in composition space required for the fluxes. Finally, a systematic application of the method to simulate laminar hydrogen flames in various canonical configurations is presented from premixed to stratified flames, including the case of a triple flame with different mixing lengths. The results demonstrate that the method describes accurately the flame structure and propagation velocities at a low cost, showing a remarkable agreement with the detailed chemistry solutions for flame structure and propagation speed.

Novelty and significance statement

The novelty of the paper lies on the presentation of an extended, robust and comprehensive model for tabulated chemistry incorporating mixture-averaged diffusion. The paper demonstrates the suitability of the model to describe stratified flames when preferential diffusion effects are important by simulating a relevant set of canonical flame configurations. The significance of the paper is that it allows to accurately reproduce a complex phenomenon as it is differential diffusion by the application of a tabulated method, without introducing overheads, and allowing to drastically reduce the computational cost of the simulations.

查看原文本刊更多论文

部分预混氢火焰的优先扩散火焰生成流形方法评价

本研究系统分析了基于小火焰生成歧管（FGM）的小火焰模型在部分预混氢火焰中再现优先扩散效应的能力。在构建小火焰数据库时，通过包括混合平均传输模型来考虑详细的传输效应。这种方法在控制变量的输运方程的扩散通量中加入了新的项，这些项来自于从流形中包含的数据计算出的一组系数。该流形由可燃性范围内的一组未拉伸绝热一维预混火焰的解构成，采用混合平均输运法。特别注意与化学流形的构造有关的数值方面，以及如何在评估通量所需的成分空间梯度时减少数值误差。最后，系统地应用该方法模拟了从预混火焰到分层火焰的各种典型构型层流氢火焰，包括不同混合长度的三重火焰的情况。结果表明，该方法准确地描述了火焰结构和传播速度，成本低，与火焰结构和传播速度的详细化学解具有显著的一致性。新颖性和意义声明：本文的新颖性在于提出了一个包含混合平均扩散的扩展的、鲁棒的和全面的制表化学模型。本文通过对一组典型火焰构型的模拟，证明了该模型在优先扩散效应较重要时描述分层火焰的适用性。本文的意义在于，它允许通过应用表格方法精确地再现复杂现象，因为它是微分扩散，而不会引入开销，并允许大幅降低模拟的计算成本。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Combustion and Flame 工程技术-工程：化工

CiteScore

9.50

自引率

20.50%

发文量

631

审稿时长

3.8 months

期刊介绍： The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on: Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including: Conventional, alternative and surrogate fuels; Pollutants; Particulate and aerosol formation and abatement; Heterogeneous processes. Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including: Premixed and non-premixed flames; Ignition and extinction phenomena; Flame propagation; Flame structure; Instabilities and swirl; Flame spread; Multi-phase reactants. Advances in diagnostic and computational methods in combustion, including: Measurement and simulation of scalar and vector properties; Novel techniques; State-of-the art applications. Fundamental investigations of combustion technologies and systems, including: Internal combustion engines; Gas turbines; Small- and large-scale stationary combustion and power generation; Catalytic combustion; Combustion synthesis; Combustion under extreme conditions; New concepts.