爆炸与冲击2026，Vol.46Issue(8)：92-102,11.DOI:10.11883/bzycj-2025-0278
燃料空气炸药云团的起爆裕度
Ignition margin of fuel-air explosive cloud
摘要
Abstract
This study focuses on the scenario in which the secondary initiation charge column is positioned at the periphery of the cloud formed subsequent to the dispersion of the fuel-air explosive(FAE).It conducts in-depth research on the initiation margin of the cloud.A prototype filled with 12.5 kg of colud explosive was meticulously designed.The maximum radius of the cloud was precisely determined through a series of dispersion tests.A 1-kg-HMX-based explosive was employed as the secondary detonator explosive.Through comprehensive experimental investigations,including high-speed and overpressure tests,the relationship between the distance of the charge column from the edge of the cloud and the initiation state of the cloud was established,and the distance threshold was accurately determined.Using the peak overpressure at the edge of the cloud as an index to measure the initiation margin,the threshold of the peak overpressure at the cloud edge that satisfies the initiation conditions of the cloud was investigated via empirical formulas and numerical simulations.The peak overpressure was further verified based on the critical energy flow criterion.The results indicate that placing a 1-kg-HMX-based explosive at the periphery of the cloud can also trigger the cloud to detonate,provided that the distance from the cloud edge does not exceed 0.5 m.When the energy of the secondary initiation charge column is adequate to trigger stable detonation of the cloud,the location of the secondary detonator explosive exerts minimal influence on the detonation overpressure.To guarantee the initiation performance of the cloud,the peak overpressure at the edge of the cloud generated by the secondary detonator explosive should not be lower than 5 MPa.This study takes into account the stringent conditions for cloud initiation,and the research findings can offer support for the design of the secondary initiation charge columns.关键词
燃料空气炸药/云团起爆裕度/二次起爆药柱/边缘超压峰值Key words
fuel-air explosive/cloud ignition margin/secondary initiation explosive charge/edge peak overpressure分类
数理科学引用本文复制引用
贾大卫,何超,周涛,管璇..燃料空气炸药云团的起爆裕度[J].爆炸与冲击,2026,46(8):92-102,11.基金项目
国防科技卓越青年科学基金(J-JK-ZQ-2101) （J-JK-ZQ-2101）
