Influences of fine water mist on the post-detonation processes of a PE4 explosive charge in a semi-confined blast chamber
The influences of a fine water mist environment in a semi-confined blast chamber on the chemical and thermodynamic processes following detonation of a 20 g PE4 explosive charge have been investigated.The effects were quantified by the analysis of pressure profiles recorded where several parameters including arrival time of the shock at the sensors, peak overpressures, specific impulse of the positive phase, period of the negative phase and the specific impulse of the multiple reflections were quantified.In this paper, the focus is on the implications of the fine water mist on the negative phase and the impulse of multiple pressure reflections.The period of the negative phase was found to have increased by 40% and with higher negative peak pressure in the mist condition compared to the atmospheric condition.The activities of the multiple pressure reflections were found to have decreased considerably, both in number and in amplitude leading to lower impulses (by about 60%) for the water mist conditions.
Fine water mist Blast mitigation Semi-confined blast chamber Negative phase pressure Multiple pressure reflections
Zetu Jiba Tleyane Jonas Sono Frederik Mostert
Council for Scientific and Industrial Research (CSIR), Defence Peace Safety and Security, P.O Box 395, Pretoria 0001, Republic of South Africa
国际会议
2018 International Conference on Defence Technology (2018国际防务技术会议)
北京
英文
752-754
2018-10-21（万方平台首次上网日期，不代表论文的发表时间）