摘要
通过调节燃烧室内空气流量的方法,研究电缆或光缆在受火条件下的火焰蔓延、热释放和产烟特性试验中燃烧室内空气流量对电缆燃烧及喷灯火焰形状的影响;同时,对比常见管道空气流量测量方法的优缺点,结合风量平衡定律,采用基于风量罩的空气流量测量方法,对燃烧室内空气流量的测量准确性及流速分布特性进行模拟。结果表明,不同管道布局下进入燃烧室内空气流量的稳定性存在较大差异,且因管道内空气流量的测量位置不一致,此差异将进一步增大,而基于风量罩的燃烧室内空气流量测量方法能够解决空气流量测量位置不一致的问题,且准确、方便,可为GB/T 31248—2014中燃烧室前圆形管道的管道布局提供有效的技术指导。
Effect of air flow on cables combustion and flame shape in tests of flame spread,heat release,and smoke production of cables or optical fibers under fire conditions was investigated by adjusting air flow in combustion chamber.At the same time,advantages and disadvantages of common methods for measuring air flow in pipes were compared.Combined with air volume equilibrium law,measurement accuracy and flow velocity distribution characteristics of air flow in combustion chamber were simulated by using air flow measurement method based on air flow hood.Results showed that stability of air flow into combustion chamber under different pipe layouts was quite different,which would be furtherly increased due to inconsistent measurement position of air flow in pipeline,while air flow measurement method in combustion chamber based on air flow hood could accurately and conveniently address the issue of inconsistent measurement locations in duct air flow measurement,and could provide effective technical guidance for pipe layout of circular pipe before combustion chamber in GB/T 31248—2014.
作者
吴鲲
朱春宇
王峥
李才有
于龙福
WU Kun;ZHU Chunyu;WANG Zheng;LI Caiyou;YU Longfu(Shanghai Electric Cable Research Institute Co.,Ltd.,Shanghai 200093,China;Shanghai SECRI Optical&Electric Cable Co.,Ltd.,Shanghai 200093,China;Shanghai National Center of Testing and Inspection for Electric Cable and Wire Co.,Ltd.,Shanghai 200444,China;Anhui Yuce Cable Quality Inspection Technology Co.,Ltd.,Wuwei 228300,China)
出处
《电线电缆》
2025年第5期5-12,共8页
Wire & Cable
关键词
进气流量
矩形管道
风量罩
air intake flow
rectangular pipes
air flow hood
