基于正交设计的半敞开式隧道火灾模型试验
发布时间：2018-07-20 11:17
【摘要】：为了研究竖井不同尺寸参数组合变化时,自然通风半敞开式隧道发生火灾时的防排烟性能,文章设计并开展了一系列小尺寸模型试验,选取竖井宽度、高度、组间距以及每组竖井数量作为可控因子,选择顶棚附近最高烟气温度、烟气扩散速率和烟气沉降速率作为考核指标,分别得到了降低顶棚附近最高烟气温度、减小烟气蔓延速率和烟气沉降速率的竖井优化方案。研究结果表明,各工况顶棚附近最高烟气温度均小于100℃,竖井宽度对顶棚附近最高烟气温度影响最大,而竖井高度对烟气扩散速率和烟气沉降速率影响均比较大,竖井组间距对烟气扩散速率影响显著。
[Abstract]:In order to study the smoke prevention and exhaust performance of natural ventilation semi-open tunnel when the combination of different size parameters of shaft is changed, a series of small-scale model tests are designed and carried out in this paper, and the width and height of shaft are selected. The maximum flue gas temperature near the ceiling, the smoke diffusion rate and the flue gas sedimentation rate are selected as the assessment indexes, and the maximum flue gas temperature near the ceiling is obtained. Optimization scheme of shaft to reduce flue gas spread rate and flue gas subsidence rate. The results show that the maximum flue gas temperature near the ceiling is less than 100 鈩，
本文编号：2133344
[Abstract]:In order to study the smoke prevention and exhaust performance of natural ventilation semi-open tunnel when the combination of different size parameters of shaft is changed, a series of small-scale model tests are designed and carried out in this paper, and the width and height of shaft are selected. The maximum flue gas temperature near the ceiling, the smoke diffusion rate and the flue gas sedimentation rate are selected as the assessment indexes, and the maximum flue gas temperature near the ceiling is obtained. Optimization scheme of shaft to reduce flue gas spread rate and flue gas subsidence rate. The results show that the maximum flue gas temperature near the ceiling is less than 100 鈩，
本文编号：2133344
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