Numerical simulation of blast wave mitigation achieved by water inside a subsurface magazine model. (September 2016)

• Record Type: Journal Article
• Authors: Sugiyama, Yuta; Tanaka, Tomohiro; Matsuo, Akiko; Homae, Tomotaka; Wakabayashi, Kunihiko; Matsumura, Tomoharu; Nakayama, Yoshio
• Is Part Of: Journal of loss prevention in the process industries. Volume 43(2016:Sep.)
• Page Start: 521
• Page End: 528
• Publication Date: 2016-09
• Subjects: Mitigation -- Blast wave -- Water -- Energy exchange -- CFD; Chemical industries -- Safety measures -- Periodicals; 660.2804
• DOI: 10.1016/j.jlp.2016.07.015
• Languages: English
• ISSNs: 0950-4230

Abstract

Abstract: This paper visualizes explosions in a subsurface magazine model constructed underground to mitigate the effects of blast waves. Numerical simulations discuss the effect of water that is put inside the magazine model. In the case of the explosion inside the magazine with water, the peak overpressure on the ground becomes smaller than that in the case of the explosion on the ground. The peak overpressures on the ground agree with those in the previous experiment. The increases of kinetic and internal energies of water are then estimated, and that the internal energy transfer at the interface of water and air is one of important factors to mitigate the blast wave on the ground in the present numerical method. As high-pressure gas at the exit of the magazine model drives the blast wave, the exit impulse and pressure are calculated and well reduced in the case with water inside the magazine model. Our study confirms that the exit pressure can scale the peak overpressure on the ground. Highlights: This paper gives the mitigation mechanism on a blast wave by water. Energy exchange from shocked-air to water inside the magazine is estimated by the numerical simulation. The internal energy transfer is a dominant factor to mitigate the blast wave. The exit pressure of the magazine scales the peak overpressure on the ground.