| 摘要: |
| 针对近年来水运建设中出现的船舶通航隧洞这类新型通航建筑物,聚焦于通航隧洞火灾临界风速确定问题,本文采用数值模拟仿真的方法探究船舶通航隧洞的临界风速计算方法,将数值模拟实验值与传统的公路、铁路隧道临界风速经验公式计算值和相关标准规范进行了比较,分析传统计算公式和规范标准对船舶通航隧洞这类特殊隧道的适用性。研究结果表明,传统的经验公式法与数值实验值存在不同程度的差异,相关规范标准难以准确反映不同火源热释放速率的工况下的临界风速。在此基础上,本文分析水运通航隧洞临界风速与隧洞特征数据的相关性,研究得出其与火源热释放速率、隧洞横截面周长以及隧洞净空高度相关性更强,进而引入水路船舶隧洞截面系数,提出了适用于水路船舶通航隧洞的临界风速计算公式。 |
| 关键词: 安全工程 通航隧洞 隧洞火灾 火灾临界风速 数值模拟 |
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| 基金项目:国家自然科学(52271368)、国家自然科学(52471382)、湖北省自然科学(2023AFB148) |
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| Study on critical velocity of navigation tunnels fire based on numerical simulation |
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dengjian1, zhulin1, chenpengyun2, zhangyu1, xiecheng1
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1.Wuhan University of Technology;2.Changjiang Survey Planning Design and Research Limited Co.
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| Abstract: |
| Focusing on the critical velocity determination of fire in navigable tunnels, this paper uses numerical simulation to investigate the critical velocity calculation method of navigable tunnels for ships and compares the numerical simulation values with the traditional empirical formulae for critical wind speed of highway and railroad tunnels and the relevant standards to analyze the applicability of the traditional formulae and standards to this kind of special tunnels for ships. The numerical simulation experimental values are compared with those of the traditional empirical formulae for critical wind speed in road and railway tunnels and the relevant standards to analyze the applicability of the traditional formulae and standards to this kind of special tunnels. The results show that there are different degrees of differences between the traditional empirical formulas and the numerical experimental values, and it is difficult for the relevant norms and standards to accurately reflect the critical velocity of ship navigation tunnels under the working conditions of different heat release rates from fire sources. On this basis, this paper analyzes the correlation between the critical velocity of waterway navigation tunnels and the characteristic data of the tunnels, and concludes that the correlation between the critical velocity and the heat release rate of the fire source, the perimeter of the cross-section of the tunnels, and the headroom height of the tunnels is stronger, and then introduces the cross-sectional coefficient of the waterway ship tunnels , and proposes the formula for calculating the critical wind speed of the waterway ship navigation tunnels. |
| Key words: Safety engineering Navigation tunnel Tunnel fires Critical velocity Numerical simulation |
