Accession Number : ADA266815


Title :   The Influence of Stacking Powder Kegs on Safe Warehouse Temperatures (De Invloed van de Stapeling van Vaten Kruit op de Veilige Opslagtemperatuur)


Descriptive Note : Final rept.,


Corporate Author : PRINS MAURITS LABORATORIUM TNO RIJSWIJK (NETHERLANDS)


Personal Author(s) : Lont, J C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266815.pdf


Report Date : Jan 1993


Pagination or Media Count : 33


Abstract : A commonly used safety criterion for the storage of gunpowder is the critical diameter. This diameter must not be exceeded by a stored package of gunpowder to ensure that the heat production caused by slow decomposition reactions can be compensated by loss of heat to the surroundings. This safety criterion is normally applied to the size of a single package. However, the cooling effect can be decreased by the close stacking of packages in a storage area, which could render the system unstable. A stack of two layers of twenty- five closely packed drums of powder was modelled using a finite element method and the results were compared with the behavior of a single drum. The heat flow in the space between the drums was modelled using an effective conductivity of 1 W/mK. The stack had a 10 to 15 deg C lower critical ambient temperature as compared to the single drum. Critical ambient temperatures as low as approximately 50 deg C were encountered. The (effective) conductivity of the powder and the air between the drums are the most important factors that determine the thermal stability of the stack.


Descriptors :   *POWDERS , COMPUTER PROGRAMS , COMPUTERIZED SIMULATION , DIAMETERS , TEMPERATURE , STABILITY , EXPLOSIONS , COOLING , SAFETY , HEAT TRANSMISSION , GUN PROPELLANTS , STACKING , DECOMPOSITION , STORAGE , FLOW , PROPELLANTS , THERMAL STABILITY , FINITE ELEMENT ANALYSIS , PRODUCTION , NETHERLANDS , CONDUCTIVITY , LAYERS


Subject Categories : Ammunition and Explosives


Distribution Statement : APPROVED FOR PUBLIC RELEASE