V. Bisio , F. Montomoli , S. Rossin , V.L. Tagarielli
{"title":"弹性球壳内的爆燃:流体与结构的相互作用效应","authors":"V. Bisio , F. Montomoli , S. Rossin , V.L. Tagarielli","doi":"10.1016/j.combustflame.2024.113594","DOIUrl":null,"url":null,"abstract":"<div><p>We examine the problem of deflagration of a flammable gaseous mixture contained within an elastic spherical shell and ignited at its centre. We predict analytically the pressure wave radiated by an expanding spherical deflagration front and we study its interaction with the elastic shell prior to failure. We predict the waves reflected at the inner wall of the shell and radiated in the space outside the shell, which we assume initially filled with air at atmospheric pressure, and we calculate the magnitude of these waves as a function of density, thickness and elastic modulus of the shell. The findings of this model are used to critically assess laboratory setups used in controlled deflagration experiments, in which a flammable mixture is initially contained by a soft shell. The interpretation of data from these tests currently assumes that the gaseous mixture is effectively unconfined during the deflagration, due to the low mass, low stiffness and early failure of the containing shell. We show that this assumption is not adequate and it leads to errors in the interpretation of the measurements; the proposed model is used to quantify these errors.</p></div>","PeriodicalId":280,"journal":{"name":"Combustion and Flame","volume":null,"pages":null},"PeriodicalIF":5.8000,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0010218024003031/pdfft?md5=f57e568797633b03bea1a73862521300&pid=1-s2.0-S0010218024003031-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Deflagration inside an elastic spherical shell: Fluid-structure interaction effects\",\"authors\":\"V. Bisio , F. Montomoli , S. Rossin , V.L. Tagarielli\",\"doi\":\"10.1016/j.combustflame.2024.113594\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We examine the problem of deflagration of a flammable gaseous mixture contained within an elastic spherical shell and ignited at its centre. We predict analytically the pressure wave radiated by an expanding spherical deflagration front and we study its interaction with the elastic shell prior to failure. We predict the waves reflected at the inner wall of the shell and radiated in the space outside the shell, which we assume initially filled with air at atmospheric pressure, and we calculate the magnitude of these waves as a function of density, thickness and elastic modulus of the shell. The findings of this model are used to critically assess laboratory setups used in controlled deflagration experiments, in which a flammable mixture is initially contained by a soft shell. The interpretation of data from these tests currently assumes that the gaseous mixture is effectively unconfined during the deflagration, due to the low mass, low stiffness and early failure of the containing shell. We show that this assumption is not adequate and it leads to errors in the interpretation of the measurements; the proposed model is used to quantify these errors.</p></div>\",\"PeriodicalId\":280,\"journal\":{\"name\":\"Combustion and Flame\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2024-07-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0010218024003031/pdfft?md5=f57e568797633b03bea1a73862521300&pid=1-s2.0-S0010218024003031-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Combustion and Flame\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0010218024003031\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Combustion and Flame","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0010218024003031","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}
Deflagration inside an elastic spherical shell: Fluid-structure interaction effects
We examine the problem of deflagration of a flammable gaseous mixture contained within an elastic spherical shell and ignited at its centre. We predict analytically the pressure wave radiated by an expanding spherical deflagration front and we study its interaction with the elastic shell prior to failure. We predict the waves reflected at the inner wall of the shell and radiated in the space outside the shell, which we assume initially filled with air at atmospheric pressure, and we calculate the magnitude of these waves as a function of density, thickness and elastic modulus of the shell. The findings of this model are used to critically assess laboratory setups used in controlled deflagration experiments, in which a flammable mixture is initially contained by a soft shell. The interpretation of data from these tests currently assumes that the gaseous mixture is effectively unconfined during the deflagration, due to the low mass, low stiffness and early failure of the containing shell. We show that this assumption is not adequate and it leads to errors in the interpretation of the measurements; the proposed model is used to quantify these errors.
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.