| 韩见云,纪杰,王培永.竖井横截面积对隧道自然排烟效果影响的实验研究[J].火灾科学,2013,22(1):36-43. |
| 竖井横截面积对隧道自然排烟效果影响的实验研究 |
| Experimental investigation on influence of shaft cross-sectional area on natural ventilation in urban road tunnel fires |
| 投稿时间：2013-01-30 修订日期：2013-02-20 |
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| DOI：10.3969/j.issn.1004-5309.2013.01.06 |
| 基金项目:国家自然科学基金（50904055）和灭火救援技术公安部重点实验室开放课题资助（KF2011001） |
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| 中文关键词: 隧道 竖井 自然排烟 吸穿 排烟效果 |
| 英文关键词:Road tunnel Vertical shaft Natural ventilation Plug-holing Exhaust efficiency |
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| 中文摘要: |
| 在1:6尺寸城市隧道实验台上开展了一系列试验，研究了不同火源功率、竖井横截面尺寸条件下，隧道自然排烟竖井的排烟效果。结果表明，竖井的横截面尺寸直接影响竖井内烟气运动的驱动力的大小，从而影响排烟效果。在一定的火源功率下，竖井横截面积过小时难以有效排出烟气，面积过大将会产生过于强烈的烟囱效应，导致排烟口下方空气被直接排出，排烟效果显著下降；竖井横截面积一定时，在不同的火源功率下，竖井放置方式同样影响竖井的排烟效果。 |
| 英文摘要: |
| Experiments were conducted in a small-scale model tunnel with a scale ratio of 1:6. The purpose of this paper is to investigate the effect of shaft cross-sectional geometry on the natural ventilation in urban road tunnel fires under different heat release rates. Results show that the dimension of shaft cross-section has a significant effect on the driving force of the smoke movement. In a certain heat release rate with a small area of shaft cross-section, the mass flow rate exhausted through shaft is not enough to effectively discharge the smoke, while a too large area will lead to too strong stack effect, and the ambient fresh air beneath the smoke layer will be exhausted directly. Moreover, with a certain area, the placement of the shaft also affects the smoke exhaust efficiency under different heat release rates. |
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