In present research, a CFD-based approach together with the validated finite volume N–S solver had been applied to precisely analyze the spill flame characteristics in adjacent space induced by fire incident in a Chemical Hazardous Materials (CHMs) container. Coupling mechanism between spill flame behavior and opening types of CHMs container was discussed in terms of different container vent sizes integrated with equivalence theory of fire source. Effects of flame height, width, velocity vector and temperature profile on spill flame features were examined. Spill flame propagation in adjacent space between CHMs containers was related to the opening size and adjacent distance. It was found that spill flame height and width in adjacent space between containers have separate forms of change. The flame temperatures in adjacent space were determined by an overall energy balance between Heat Release Rate (HRR) inside CHMs container and the adjacent container constraint using air entrainment effect. Temperature field changes significantly and thermal hazards led to spontaneous ignition in adjacent CHMs containers, further resulting in catastrophic domino accidents. Considering spill flame behavior and variation coefficient of entrainment ω, the modified non-dimensional performance models for characteristic parameters were proposed, which could significantly improve prediction effectiveness of thermal hazards from CHMs container fire.
Read full abstract