Effect of surface conditions on blast wave propagation

Seungho Song, Yibao Li, Chang Hoon Lee, Jung-il Choi

Research output: Contribution to journalArticle

Abstract

We performed numerical simulations of blast wave propagations on surfaces by solving axisymmetric two-dimensional Euler equations. Assuming the initial stage of fireball at the breakaway point after an explosion, we investigated the effect of surface conditions considering surface convex or concave elements and thermal conditions on blast wave propagations near the ground surface. Parametric studies were performed by varying the geometrical factors of the surface element as well as thermal layer characteristics. We found that the peak overpressure near the ground zero was increased due to the surface elements, while modulations of the blast wave propagations were limited within a region for the surface elements. Because of the thermal layer, the precursor was formed in the propagations, which led to the attenuation of the peak overpressure on the ground surface.

Original languageEnglish
Pages (from-to)3907-3915
Number of pages9
JournalJournal of Mechanical Science and Technology
Volume30
Issue number9
DOIs
Publication statusPublished - 2016 Sep 1

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Wave propagation
Euler equations
Explosions
Modulation
Computer simulation
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "We performed numerical simulations of blast wave propagations on surfaces by solving axisymmetric two-dimensional Euler equations. Assuming the initial stage of fireball at the breakaway point after an explosion, we investigated the effect of surface conditions considering surface convex or concave elements and thermal conditions on blast wave propagations near the ground surface. Parametric studies were performed by varying the geometrical factors of the surface element as well as thermal layer characteristics. We found that the peak overpressure near the ground zero was increased due to the surface elements, while modulations of the blast wave propagations were limited within a region for the surface elements. Because of the thermal layer, the precursor was formed in the propagations, which led to the attenuation of the peak overpressure on the ground surface.",
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Effect of surface conditions on blast wave propagation. / Song, Seungho; Li, Yibao; Lee, Chang Hoon; Choi, Jung-il.

In: Journal of Mechanical Science and Technology, Vol. 30, No. 9, 01.09.2016, p. 3907-3915.

Research output: Contribution to journalArticle

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