为了解决城市地下交通联系隧道(urban traffic link tunnel,UTLT)火灾烟气安全的问题,采用量纲分析方法推导出了UTLT火灾烟气回流长度的量纲一方程式;根据调查的UTLT的常见尺寸,设置了9种不同尺寸的UTLT,运用数值模拟软件FDS 5.5对这些...为了解决城市地下交通联系隧道(urban traffic link tunnel,UTLT)火灾烟气安全的问题,采用量纲分析方法推导出了UTLT火灾烟气回流长度的量纲一方程式;根据调查的UTLT的常见尺寸,设置了9种不同尺寸的UTLT,运用数值模拟软件FDS 5.5对这些隧道进行模拟计算,得到了不同工况下的火灾烟气回流长度,进而得到了UTLT火灾烟气回流长度的预测模型.通过与实验值的比较表明,该方程式和实验值吻合较好.在进一步分析的基础上,得到了UTLT的限制隧道预测模型,可为此类隧道的消防设计提供一定的技术指导.展开更多
In order to investigate the smoke diffusion law under the one-side centralized smoke exhaust mode of the urban connection tunnel (UTLT), the influence of the area of the smoke exhaust port on the smoke control, temper...In order to investigate the smoke diffusion law under the one-side centralized smoke exhaust mode of the urban connection tunnel (UTLT), the influence of the area of the smoke exhaust port on the smoke control, temperature distribution and smoke exhaust efficiency of the one-side centralized tunnel was experimentally studied. The results show that increasing the area of the smoke outlet will reduce the thickness of the smoke layer;The top smoke outlet can effectively reduce the temperature at the smoke outlet, and the temperature at the downstream of the smoke outlet is obviously lower than the temperature at the upstream of the smoke outlet;The bend in UTLT can delay the longitudinal spread of smoke. Changing the distance between the fire source and the smoke outlet has little effect on the one-sided centralized smoke exhaust.展开更多
文摘为了解决城市地下交通联系隧道(urban traffic link tunnel,UTLT)火灾烟气安全的问题,采用量纲分析方法推导出了UTLT火灾烟气回流长度的量纲一方程式;根据调查的UTLT的常见尺寸,设置了9种不同尺寸的UTLT,运用数值模拟软件FDS 5.5对这些隧道进行模拟计算,得到了不同工况下的火灾烟气回流长度,进而得到了UTLT火灾烟气回流长度的预测模型.通过与实验值的比较表明,该方程式和实验值吻合较好.在进一步分析的基础上,得到了UTLT的限制隧道预测模型,可为此类隧道的消防设计提供一定的技术指导.
文摘In order to investigate the smoke diffusion law under the one-side centralized smoke exhaust mode of the urban connection tunnel (UTLT), the influence of the area of the smoke exhaust port on the smoke control, temperature distribution and smoke exhaust efficiency of the one-side centralized tunnel was experimentally studied. The results show that increasing the area of the smoke outlet will reduce the thickness of the smoke layer;The top smoke outlet can effectively reduce the temperature at the smoke outlet, and the temperature at the downstream of the smoke outlet is obviously lower than the temperature at the upstream of the smoke outlet;The bend in UTLT can delay the longitudinal spread of smoke. Changing the distance between the fire source and the smoke outlet has little effect on the one-sided centralized smoke exhaust.
