Peak Overpressures for Internal Blast.

摘要

Rapid combustion of fuel in a confined volume of air generates internal blast that can be quite destructive. Peak overpressures have been calculated for the internal blast resulting from the explosive combustion of both conventional and explosive C-H-N-O fuels by using a tabletop computer. The calculations use the principles of the conservation of mass, the conservation of energy, and the second law of thermodynamics. The calculational routine allows for variations in the possible heat transfer to cool confining walls, altitude of the combustion, and the velocity of fuel injection into the confining volume. The code also computes items not normally available experimentally, such as the explosion flame temperature and the composition, formula mass, and heat capacity of the explosion products. Results for representative internal blast situations are presented and discussed.