障碍物对天然气喷射火影响的数值模拟研究

发布时间：2018-06-25 03:00

本文选题：喷射火 + 障碍物　；参考：《中国安全生产科学技术》2016年01期

【摘要】：为研究障碍物控制天然气喷射火对周围设施危害的有效性,基于流体力学基本原理与湍流模型,采用FDS模拟软件,分别研究高度为10 m的障碍物宽度和障碍物与泄漏孔间距对喷射火的影响。研究得出:障碍物对喷射火阻挡效果明显,减缓了火焰在速度方向的传播;障碍物越宽,控制火焰向前传播的效果越好,障碍物后方受火焰高温和热辐射危害越小,但随着宽度的增加,后方温度和热辐射下降率减小,障碍物宽3 m时,对火焰控制效果最好;随着障碍物与泄漏孔间距增加,障碍物后方热辐射先增加后减小,间距为5 m时,障碍物对火焰的控制效果最好,此时喷射火下游受保护的区域最宽。研究结果可为储气罐发生泄漏火灾事故处置及应急设施设计提供参考。
[Abstract]:In order to study the effectiveness of obstacle control of natural gas injection fire to surrounding facilities, based on the basic principles of fluid dynamics and turbulence model, FDS simulation software is used. The influence of the height of 10 m obstacle width and the distance between the barrier and the leak hole on the jet fire was studied. The results show that the barrier effect is obvious and the flame propagation is slowed down in the direction of velocity, the wider the obstacle is, the better the effect of controlling flame forward propagation is, and the less harm is caused by flame high temperature and thermal radiation behind the obstacle, However, with the increase of the width, the temperature and the decrease rate of the thermal radiation decrease. When the barrier width is 3 m, the flame control effect is the best, and with the increase of the distance between the obstacle and the leak hole, the thermal radiation first increases and then decreases, and the distance is 5 m. The barrier has the best control effect on the flame, and the protected area downstream of the spray fire is the widest. The results can be used as a reference for the disposal of gas tank leakage and fire accident and the design of emergency facilities.
【作者单位】：重庆科技学院石油与天然气工程学院;首都经济贸易大学安全与环境工程学院;
【基金】：国家自然科学基金项目(51474151) 北京市哲学社会科学CBD发展研究基地创新项目(TDJD201560)
【分类号】：TE88

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