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A Review of TNT Equivalent Method for Evaluating Explosion Energy due to Gas Explosion  

Kwon, Sangki (인하대학교 에너지자원공학과)
Park, Jung-Chan (인하대학교 에너지자원공학과)
Publication Information
Explosives and Blasting / v.33, no.3, 2015 , pp. 1-13 More about this Journal
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.
Keywords
TNT equivalent; Detonation; Explosion energy; Gas explosion; Methane gas;
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