{"title":"Ignition by concentrated heat sources: Minimum energy required and flame propagation over long distances in mixtures below the flammability limit","authors":"Vadim N. Kurdyumov, Carmen Jiménez","doi":"10.1016/j.combustflame.2024.113959","DOIUrl":null,"url":null,"abstract":"<div><div>Numerical analysis based on a chain-branching chemistry model reveals the possibility of successful ignition and flame propagation over long distances at a sufficiently high localized concentrated energy in mixtures below the flammability limit at low Lewis numbers.</div><div><strong>Novelty and significance statement</strong></div><div>This work demonstrates for the first time that the application of a concentrated energy source of sufficient intensity can cause not only ignition but also flame propagation over long distances in mixtures with low Lewis numbers below the flammability limit. This can result in safety issues.</div></div>","PeriodicalId":280,"journal":{"name":"Combustion and Flame","volume":"273 ","pages":"Article 113959"},"PeriodicalIF":5.8000,"publicationDate":"2025-01-08","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/S0010218024006680","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
Numerical analysis based on a chain-branching chemistry model reveals the possibility of successful ignition and flame propagation over long distances at a sufficiently high localized concentrated energy in mixtures below the flammability limit at low Lewis numbers.
Novelty and significance statement
This work demonstrates for the first time that the application of a concentrated energy source of sufficient intensity can cause not only ignition but also flame propagation over long distances in mixtures with low Lewis numbers below the flammability limit. This can result in safety issues.
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.
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