This study investigates the impulses of blast wave generated from explosions of premixed gases using a blast model that utilizes the volume variations of a burnt gas as a pressure source. A previous study showed that the blast model can estimate peak overpressurey-regardless of the kind, amount, and equivalence ratio of a gas mixture. This study examines positive impulses, and since the calculation results of this model are in agreement with previous experimental results, it is concluded that this model can be used to estimate not only peak overpressure but also positive impulse.
gas explosion, flame propagation, blast wave, impulse, blast model