![]() The pressure from multiple explosions occurring in the same vicinity but separated by time may be superimposed but shifted according to their radial-time shift ( Fig 2). Given that an explosion is simply the release of energy, more than one energy source exploding at the same time can be included in the final pressure wave profile by simply adding them together. This vacuum will ultimately fill with atmospheric gas when the pressure wave has lost most of its momentum. deep water) and non-existent if released into a vacuum.Įxplosions can be generated from an atomic/chemical reaction or the release of a pressurised gas, both of which will result in a rapidly expanding spherical pressure wave of compressed air radiating away from the source and leaving a partial vacuum at its centre ( Fig 1). As is the case for a pressure wave generated in an atmosphere with an energy density (pressure) greater than or close to that of the explosion (e.g. Explosion (a definition)Īn explosion is the sudden release of energy into an atmosphere in which it cannot be contained, and as with shock loads this can be anything from 1 Joule to many mega-Joules it's all a matter of degree. Whilst Explosions is perfectly useable as a stand-alone calculator in that it provides all the useful properties of a pressure wave resulting from an explosion, it has been designed primarily to provide the input data for CalQlata's Vents programs that will define the minimum dimensions for vents and apertures for enclosed spaces according to various standards and specifications, such as the NFPA. ![]()
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