船舶舱室火灾烟气蔓延的场-区耦合模型

汪金辉; 焦宇; 许涛; 陈伟炯

doi:10.19818/j.cnki.1671-1637.2015.02.007

船舶舱室火灾烟气蔓延的场-区耦合模型

doi: 10.19818/j.cnki.1671-1637.2015.02.007

上海海事大学海洋科学与工程学院, 上海 201306

基金项目:

国家自然科学基金项目 51109127

上海市教委一流学科建设项目 A151021402S

上海市研究生教育创新计划实施项目 20131129

上海市晨光计划项目 10CG51

详细信息

作者简介:
汪金辉(1981-), 男, 安徽桐城人, 上海海事大学讲师, 工学博士, 从事舶舶火灾风险评估研究

中图分类号: U664.8
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- 被引次数: 0
出版历程
- 收稿日期: 2014-11-23
- 刊出日期: 2015-02-25

Field-zone coupling model of fire smoke propagation in ship cabin

School of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China

More Information

Author Bio:
WANG Jin-hui(1981-), male, lecturer, PhD, +86-21-38282517, wangjh@shmtu.edu.cn

摘要

摘要: 针对大型船舶火灾中的烟气蔓延, 分析了场模型FDS软件和区域模型CFAST软件各自的局限性。基于能量传输、组分转换和压力平衡原理, 建立了船舶舱室火灾烟气蔓延的场-区耦合模型。搭建了带有4个测点的船舶舱室火灾缩尺试验平台, 验证了耦合模型的有效性。对船舶舱室火灾的烟气蔓延进行了场模拟、区域模拟和场-区耦合模拟, 并将温度和烟气层高度的模拟结果进行对比分析。分析结果表明: 4个测点的温度均随着时间的增大而上升, 在同一时刻距火源近的测点温度高, 随着与火源间距离的变大, 测点温度降低, 4个测点的温度受烟气湍流的影响略有波动; 在燃烧达到稳定状态之后, 场-区耦合模型能较准确地模拟烟气层高度的变化规律, 均优于场模型和区域模型的模拟结果; 在计算时间上, 场-区耦合模型比场模型缩减了约54%的计算时间; 场-区耦合模型的模拟结果与试验结果具有良好的一致性, 因此, 其具有较好的工程应用价值。
- 船舶工程 /
- 船舶舱室 /
- 火灾烟气 /
- 场-区耦合模型 /
- 尺度试验
Abstract: Aiming at the fire smoke propagation in large ship cabin, the limitations of field model FDS and zone model CFAST were analyzed.Based on the principles of energy transmission, component transformation and pressure balance, the field-zone coupling model of smoke propagation in ship cabin was developed, and the small scale experiment platform with4 temperature measuring points of ship cabin fire was set up to verify the effectiveness of the established coupling model.The simulations of fire smoke propagation in ship cabin were carried out by field model, zone model and field-zone coupling model respectively, and the simulation results of temperature and smoke layer height were compared.Analysis result shows the temperatures of 4measuring points increase with the increase of time, the measuring point near fire has higher temperature at the same time.With the increase of distance from fire, the temperature of measuring point falls, and the slight fluctuations of the temperatures at4 measuring points appear due to smoke turbulent flow.When fire burning reaches steady state, the change regular of smoke layer height can be simulated by using the models, and the simulation result by using field-zone coupling model is better than the simulation results by usingfield model and zone model.The calculation time for field-zone coupling model is about 54%less than the calculation time for field model.The simulation result by using field-zone coupling model is consist with the test result, so the field-zone coupling model has better engineering value.
- ship engineering /
- ship cabin /
- fire smoke /
- field-zone coupling model /
- scale test

HTML全文

图 1 控制体

Figure 1. Control body

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图 2 区域模型

Figure 2. Zone model

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图 3 火源辐射模型

Figure 3. Fire radiation model

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图 4 试验模型

Figure 4. Test model

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图 5 火源燃烧状态

Figure 5. Fire burning status

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图 6 质量与时间的关系

Figure 6. Relationship between mass and time

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图 7 试验工况下测点1的温度曲线

Figure 7. Temperature curve at measuring point 1under test condition

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图 8 试验工况下测点2的温度曲线

Figure 8. Temperature curve at measuring point 2under test condition

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图 9 试验工况下测点3的温度曲线

Figure 9. Temperature curve at measuring point 3under test condition

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图 10 试验工况下测点4的温度曲线

Figure 10. Temperature curve at measuring point 4under test condition

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图 11 场-区耦合模型

Figure 11. Field-zone coupling model

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图 12 热通量曲线

Figure 12. Heat flux curve

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图 13 模拟工况下测点1的温度曲线

Figure 13. Temperature curve at measuring point 1under simulation condition

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图 14 模拟工况下测点2的温度曲线

Figure 14. Temperature curve at measuring point 2under simulation condition

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图 15 模拟工况下测点3的温度曲线

Figure 15. Temperature curve at measuring point 3under simulation condition

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图 16 模拟工况下测点4的温度曲线

Figure 16. Temperature curve at measuring point 4under simulation condition

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图 17 场模型

Figure 17. Field model

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图 18 测点1的4种温度曲线

Figure 18. Four temperature curves at measuring point 1

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图 19 测点2的4种温度曲线

Figure 19. Four temperature curves at measuring point 2

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图 20 测点3的4种温度曲线

Figure 20. Four temperature curves at measuring point 3

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图 21 测点4的4种温度曲线

Figure 21. Four temperature curves at measuring point 4

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图 22 测点1的3种下降高度变化曲线

Figure 22. Three change curves of descent heights at measuring point 1

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图 23 测点2的3种下降高度变化曲线

Figure 23. Three change curves of descent heights at measuring point 2

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图 24 测点3的3种下降高度变化曲线

Figure 24. Three change curves of descent heights at measuring point 3

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图 25 测点4的3种下降高度变化曲线

Figure 25. Three change curves of descent heights at measuring point 4

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表 1 模型参数

Table 1. Model parameters

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