Numerical study on characteristics of hydrogen deflagration and detonation in the combustion tube

IF 2.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-03-19 DOI:10.1016/j.anucene.2025.111382

Bo Liu, Shihao Wu, Xin Shi, Yapei Zhang, Yingwei Wu

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Abstract

In severe accidents for a nuclear power plant, the zirconium-water reaction may produce a huge amount of hydrogen. The hydrogen combustion and explosion produce heavy pressure and temperature loads, which may cause equipment damage and even containment failure. Based on previous experiments on detonation in the tube, this study established numerical models of hydrogen deflagration and detonation in the tube using the FLUENT software. The process of flame acceleration and onset of detonation was accurately simulated. Calculation and experimental results show that the detonation velocity increases with the increase of stoichiometric ratio, and the peak temperature and pressure reach the maximum when stoichiometric ratio is 1.2. The detonation velocity, peak temperature and pressure are positively correlated with the initial pressure. The verified models can be used to predict hydrogen explosion phenomenon and evaluate its consequences in pressurized water reactor containment under severe accidents.

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燃烧管内氢气爆燃爆轰特性的数值研究

在核电站的严重事故中，锆-水反应可能会产生大量的氢。氢气燃烧爆炸会产生巨大的压力和温度负荷，可能导致设备损坏甚至安全壳失效。本研究在前人管内爆轰实验的基础上，利用FLUENT软件建立了氢气爆燃和管内爆轰的数值模型。准确模拟了火焰加速和起爆过程。计算和实验结果表明，爆轰速度随化学计量比的增大而增大，当化学计量比为1.2时，爆轰温度和爆轰压力峰值达到最大值。爆轰速度、峰值温度和压力与初始压力呈正相关。经验证的模型可用于严重事故下压水堆安全壳内氢气爆炸现象的预测和后果评价。

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

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.