不同放空管径下CH4爆炸的动态与演化

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-04-29 DOI:10.1016/j.csite.2025.106216

Wen Zhou , Suyue Li , Shuang Geng , Yue Zhao , Mengyi Yuan , Wenxin An , Wenhao Xing , Xueqiang Shi , Yang Zhang , Weiguo Cao

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引用次数: 0

摘要

CH4在密闭空间爆炸会造成严重的危害，而通风管可以实现爆炸的定向通风。通过8 vol% CH4的爆炸实验和数值模拟，研究了管道直径对CH4爆炸排气的影响。结果表明：管径对管内压力积累和泄压效率有影响，最大爆炸压力随管径的增大而减小；管道的直径影响排气气流的速度和压力。当管径为70 mm时，最大爆炸压力降低41.67%。当管径为30 mm时，出现了明亮清晰的马赫盘结构，而当管径为70 mm时，没有出现马赫盘结构，火焰长度和速度分别达到最大805 mm和359.55 m/s。通过数值模拟，再现了密闭和通风条件下CH4的爆炸过程，构建了CH4爆炸产生的温度场。该研究可为燃料发电厂和工业供热设备的安全设计优化，降低爆炸风险提供数据参考。

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Dynamic and evolution of the CH4 explosion with different vent tube diameters

CH₄ explosion in a confined space will cause serious harm, and the vent tube can realize the directional venting of the explosion. Through the explosion experiment and numerical simulation of 8 vol% CH₄, the impact of tube diameter on CH₄ explosion venting was studied. The findings show that the tube diameter affected the pressure accumulation and pressure venting efficiency in the tube, and the maximum explosion pressure decreased as the tube diameter increased. The diameter of the tube affected the velocity and pressure of the venting airflow. When the tube diameter was 70 mm, the maximum explosion pressure decreased by 41.67 %. When the tube diameter was 30 mm, bright and clear Mach disks structure appeared, while the Mach disk structure did not appear when the tube diameter was 70 mm, the maximum flame length and velocity were achieved, 805 mm and 359.55 m/s, respectively. Through numerical simulation, the explosion of CH₄ was reproduced under both closed and venting conditions, and the temperature field resulting from the CH₄ explosion was constructed. This study can provide data reference for optimizing the safety design of fuel power plants and industrial heating equipment and reduce the risk of explosion.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.