火灾爆炸CFD综合模拟研究进展

IF 3.7 Q1 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH
Zhenghua Yan
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引用次数: 0

摘要

本文概述了火灾和爆炸的综合计算流体力学(CFD)模拟在安全科学方面的发展概况。火灾可分为两种:常规火灾和自发火灾。传统火灾通常解决空气中不希望发生的燃烧,而自燃火灾通常解决多孔介质中不希望发生的燃烧。考虑到多孔介质对流动的主导作用,自燃火灾的行为与传统火灾完全不同。虽然火灾主要由扩散火焰组成,其中燃料和氧化剂最初是分离的,低速流动可以认为是不可压缩的,但爆炸通常发生在燃料和氧化剂最初混合良好的预混燃烧和高速流动中,其中必须包括可压缩效应。由于火灾和爆炸的复杂性,全面的CFD模拟应仔细考虑湍流、湍流燃烧、两相流动(涉及液滴和/或固体颗粒的情况)、气固耦合传热(包括热辐射、对流传热和固体内部热传导)以及可燃固体的热解。本文还讨论了这些相互作用的过程。此外,作者还介绍了一些开发以及使用Simtec软件进行的说明性模拟[1],该软件用于实现开发。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development in comprehensive CFD simulation of fire and explosion

In this study, an outline of developments is presented in comprehensive computational fluid dynamics (CFD) simulations of fire and explosion with respect to safety science. Fires can be divided into two types: conventional and spontaneous. Conventional fires typically address unwanted combustion in air, whereas spontaneous ignition fires typically address unwanted combustion in porous media. Given that the porous media has a dominant effect on the flow, the behavior of a spontaneous ignition fire completely differs from that of a conventional fire. Although a fire mainly comprises a diffusion flame, where the fuel and oxidant are initially separated, and low-speed flow that can be considered incompressible, explosion usually occurs with premixed combustion, where the fuel and oxidant are initially well-mixed, and high-speed flow where the compressible effect must be included. Owing to the complexity of fires and explosions, a comprehensive CFD simulation should carefully consider turbulence, turbulent combustion, two-phase flow (for cases where liquid droplets and/or solid particles are involved), conjugate heat transfer between gas and solid (including thermal radiation, convective heat transfer, and heat conduction inside solids), and pyrolysis of combustible solids. These interactive processes are also discussed. Furthermore, some developments by the author are presented along with illustrative simulations performed using Simtec software [1], which is used to implement the developments.

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来源期刊
安全科学与韧性(英文)
安全科学与韧性(英文) Management Science and Operations Research, Safety, Risk, Reliability and Quality, Safety Research
CiteScore
8.70
自引率
0.00%
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审稿时长
72 days
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