摘要
用理论推导和试验相结合的方法,研究铁路隧道火灾排烟流速的分布特点,及切贝切夫方法与等环面法之间的差别。在盾构断面采用等环面法布点,验证郑年丰工业圆管湍流流速分布公式与盾构断面测试数据的吻合程度;用切贝切夫方法和等环面法分别布点在盾构断面和矩形断面,将测试结果绘制成等速线图后进行对比。研究表明,郑年丰流速分布公式与测试结果吻合较好;等环面法对测点数目没有限制,能较好地反映流速分布,优于切贝切夫方法。
Features of velocity distribution in the cross-section and differences between Tchebyshev method and equal annular method were studied by using theoretical derivation and experimental investigation. Stationing was made according to the equal annular method in the cross-section of shield tunnel. For the section of shield tunnel,coincidence was studied between ZHENG Nian-feng formula and the measured data. Stationing in the rectangular and shield cross-sections,a comparison was made between the Tchebyshev method and equal annular method based on isotach graphs. The results show that the ZHENG Nianfeng formula is reasonable,equal annular method is unlimited in the numbers of stations,and is better than Tchebyshev method.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2015年第8期131-135,共5页
China Safety Science Journal
基金
中国建筑科学研究院应用技术研究课题(20130111330730030)
关键词
切贝切夫方法
等环面法
铁路隧道
排烟
流速分布
测点布置
tchebyshev
equal annular method
railway tunnel
exhaust fume
velocity distribution
stationing
