Explosives and Blasting (화약ㆍ발파)

Korean Society of Explosives and Blasting Engineering (대한화약발파공학회)
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A Review of TNT Equivalent Method for Evaluating Explosion Energy due to Gas Explosion

가스폭발에 따른 폭발에너지를 평가하기 위한 TNT 등가량 환산방법에 대한 고찰

  • 권상기 (인하대학교 에너지자원공학과) ;
  • 박정찬 (인하대학교 에너지자원공학과)
  • Received : 2015.07.15
  • Accepted : 2015.08.27
  • Published : 2015.09.30
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Abstract

Accidents related to gas explosion are frequently happened in foreign countries and in Korea. For the evaluation and the analysis of gas explosions, TNT equivalent methods are used. In this study, the influence of the selection of chemical equation in TNT explosion and the selection of enthalpy of the products on the explosion energy, detonation pressure, velocity of detonation, and temperature was calculated. Depending on the chemical equations, the maximum detonation pressure can be 2 times higher than the minimum. As an example for applying TNT equivalent method, an explosion of methane gas in a confined volume was assumed. With the TNT equivalent, it was possible to predict the variation of peak overpressure and impulse with the distance from the explosion location.

국내외에서 가스폭발 사고가 빈번하게 발생하고 있으며 가스 폭발의 평가와 분석을 위해 TNT 등가량 산정법이 사용되고 있다. 본 연구에서는 TNT 폭발 시 화학반응식의 선택과 반응 생성 물질들의 엔탈피의 선택에 따른 폭발에너지, 폭발압력, 폭굉속도 및 온도의 차이를 계산하였다. 화학반응식의 선택에 따라 계산되는 폭굉압은 최고값이 최저값에 비해 2배까지 나타났다. 밀폐된 공간에서의 메탄가스 폭발을 가정하고 TNT 등가량을 산정하였으며 이를 통해 폭발지점에서의 거리에 따른 최대압력과 임펄스 변화를 추정할 수 있었다.

Keywords

References

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