Abstract
It is well recognized that turbulence and acoustic instability play important roles in the pressure development in closed and vented explosions which may render the standard explosion venting guidelines invalid. In the future, more realistic estimates of venting requirements may be obtained through the use of computer models. The present paper reviews the analysis required to predict the pressure history within closed or vented rooms and vessels due to combustion. Computer codes with various levels of detail and sophistication are reviewed. As specific examples, we discuss the details of a simple lumped-parameter computer code called HECTR (which was developed to calculate the transient response - pressures, temperatures, and species concentrations - of a nuclear plant containment building to hydrogen combustion) and a two-dimensional, finite-difference computer code called CONCHAS-SPRAY (which solves the equations for transient, multicomponent, chemically reactive fluid dynamics). Several examples of HECTR and CONCHAS-SPRAY combustion calculations for experimental test vessels and nuclear reactor containment buildings are presented. Finally, we discuss the application of codes like HECTR and CONCHAS-SPRAY to complex situations that might occur during an accident at an industrial plant.
Published Version
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