Study on concentration distribution and detonation characteristics for non-axisymmetric fuel dispersal  

作　　者：Linghui Zeng Zhongqi Wang Xing Chen Jianping Li 

机构地区：[1]State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing,100081,China [2]College of Environment and Chemical Engineering,Sichuan University of Science&Engineering,Zigong,643000,China

出　　处：《Defence Technology（防务技术）》2024年第1期484-495,共12页Defence Technology

基　　金：supported by the National Key Research and Development Program of China (Grant No.2021YFC3001204)。

摘　　要：The study of non-axisymmetric fuel dispersal and detonation can provide reference for the prevention of industrial cloud explosion accidents and the design of fuel air explosive(FAE).The concentration and detonation fields of 85 kg cylindrical and fan-shaped fuel are investigated by experiments and numerical simulations.A dynamic model of the whole process for fuel dispersal and detonation is built.The concentration distribution of fuel is used as the initial condition to calculate the detonation stage,thus solving the initial value problem of detonation field.The phase and component changes of fuel cloud at different locations are compared.The fuel cloud is divided into directions of 0°,90°,135°and 180°.The results show that the maximum cloud radius is 20.94 m in 135°and the minimum is 12.04 m in 0°.The diameter of the detonation fireball is 53.6 m,and the peak temperature is 3455 K.The highest peak overpressure is 3.44 MPa in 0°and the lowest is 2.97 MPa in 135°.The proportion of liquid phase in 0°is22.90%,and the fuel loss is 11.8% and 9% higher than that in 135°and cylindrical charge,respectively.The stable propagation distance of blast wave in 135°is 42.50% longer than 0°and 28.37% longer than cylindrical charge.

关 键 词：Fuel dispersal Concentration distribution Detonation characteristic Fuel loss Numerical simulation 

分 类 号：TQ560.1[化学工程—炸药化工] X932[环境科学与工程—安全科学]