Ethanol pool fire on a one-meter test tray – validation of CFD results

IF 0.5 4区工程技术 Q4 ENGINEERING, CHEMICAL

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa Pub Date : 2023-07-20 DOI:10.24425/cpe.2022.140809

R. Cherbański, L. Rudniak, P. Machniewski, E. Molga, J. Tępiński, Wojciech Klapsa, P. Lesiak

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引用次数: 0

Abstract

The ethanol ﬁre hazards will become more frequent due to the new established targets for the consumption of renewable energy sources. With this in mind, this paper aims to widen the current knowledge on CFD modelling of such a ﬁre. As previous works rely heavily on the data of small pool ﬁre diameters (below 1 m), this research deals with ethanol pool ﬁre on a one-meter test tray, using our own experimental data. A mathematical model was developed and solved using a commercial CFD package (ANSYS Fluent). A new hybrid RANS-LES (SBES) model was employed to calculate turbulent stresses. Generally, the simulation results showed a good ﬁt with the experimental results for ﬂame temperatures at diﬀerent elevations. In particular, a minor discrepancy was only observed for the top thermocouple (1.9 m above the tray). The ﬂame heights computed with the CFD model were on average higher than the experimental one. Good agreement was observed for the radiative fraction and the axial temperature proﬁle on the plume centreline. The latter showed an almost perfect ﬁt between the temperature proﬁles obtained from CFD simulations and those calculated from the plume law for temperature.

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一米测试托盘上的乙醇池火- CFD结果的验证

由于对可再生能源消费目标的新设定，乙醇火灾隐患将更加频繁。考虑到这一点，本文旨在扩大目前关于此类火灾的CFD建模的知识。由于以往的工作严重依赖于小池火直径(小于1m)的数据，本研究采用我们自己的实验数据，在一米测试盘上处理乙醇池火。建立了一个数学模型，并使用商业CFD软件包(ANSYS Fluent)进行求解。采用一种新的混合ranss - les (SBES)模型计算湍流应力。总的来说，在不同高度下火焰温度的模拟结果与实验结果吻合较好。特别是，只有在顶部热电偶(托盘上方1.9米)观察到一个微小的差异。计算得到的火焰高度平均高于实验值。辐射分数与烟羽中心线的轴向温度分布吻合较好。后者显示了从CFD模拟得到的温度分布与从羽流定律计算得到的温度分布之间几乎完美的拟合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa 工程技术-工程：化工

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The content, aim and scope of the proposals should comply with the main subject of the journal, i.e. they should deal with mathematical modelling and/or experimental investigations on momentum, heat and mass transfer, unit processes and operations, integrated processes, biochemical engineering, statics and kinetics of chemical reactions. The experiments and modelling may cover different scales and processes ranging from the molecular phenomena up to production systems. The journal language is grammatically correct British English. Chemical and Process Engineering publishes: i) full text research articles, ii) invited reviews, iii) letters to the editor and iv) short communications, aiming at important new results and/or applications. Each of the publication form is peer-reviewed by at least two independent referees.