摘要
该文搭建了综合管廊燃气舱模型实验台,设计了N_(2)在CO_(2)中泄漏和Ne在空气中泄漏的实验方案,实测数据表明,相比于N_(2)在CO_(2)中泄漏,Ne在空气中泄漏的气体采集率高且实验步骤较为简单,拟合效果更接近天然气在空气中泄漏,最大相对误差为14.9%。通过CFD模拟计算天然气在空气中泄漏、N_(2)在CO_(2)中泄漏以及Ne在空气中泄漏三种情况,结果表明无通风条件下泄漏气体的扩散规律一致,在报警响应浓度下,Ne与天然气的高浓度扩散半径更贴近,最小仅相差1 m,而N_(2)相差10 m左右,因此Ne更适于作为天然气在空气中泄漏实验方案的替代气体。
This paper builds a comprehensive utility tunnel gas tank model experiment platform,and designs the experiment scheme of N_(2) leakage in CO_(2) and Ne leakage in air.The measured data shows that compared with N_(2) leakage in the CO_(2),gas collection rate of Ne leakage in the air is higher and the experimental steps are simpler,the fitting effect is closer to the natural gas leakage in air,and the maximum relative error is 14.9%.Three cases of natural gas leakage in air,N_(2) leakage in CO_(2) and Ne leakage in air are calculated by CFD simulation.The results show that the diffusion law of the leaked gas is consistent under the condition of no ventilation.Under the alarm response concentration,the high concentration diffusion radius of Ne and natural gas is closer,the minimum difference is only 1m,while the difference of N_(2) is about 10m.Therefore,Ne leakage in the air is more suitable for natural gas leakage in the air as an alternative gas scheme.
作者
杜佳星
许淑惠
徐荣吉
DU Jiaxing;XU Shuhui;XU Rongji(Beijing Engineering Research Center of Sustainable Energy and Buildings,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《实验技术与管理》
CAS
北大核心
2022年第11期225-231,共7页
Experimental Technology and Management
基金
北京市科技计划项目(Z171100000517007)
北京市未来城市设计高精尖创新中心项目(30059917311)。
关键词
综合管廊
天然气
泄漏
模型实验
数值模拟
integrated pipe gallery
natural gas
leakage
model experiment
numerical simulation
