FIRE INDUCED FLOW BEHAVIOR IN A VENTILATED AIRCRAFT CARGO COMPARTMENT

摘要

The effect of ventilation on the fire-induced flow behavior is studied numerically. Simulationrnresults are compared with an extensive set of data collected from the fire tests of below cargorncompartment of a McDonnell Douglas DC-10. The average production rates of species along with thernheat release and mass loss rates of the fire source employed in the full-scale tests were determinedrnfrom the cone calorimetry tests. The fire source has a maximum heat release rate of 5 kW. The forcedrnventilation through the ceiling air inlets have a total volume flux of approximately 0.19 m~3/s. Inrnaddition, there is a leakage around the compartment door as a result of the pressure differential. Thernselected metrics for comparison are the predictions of temperatures, light transmissions, andrnconcentrations of carbon monoxide (CO) and carbon dioxide (CO_2) in the first three minutes of therntest. The overall objective of this study is to improve understanding of the transport of smoke and hotrngases in enclosures, specifically applied to aircraft cargo compartments. An improved understandingrnwill enable better decisions on the selection and utilization of fire/smoke detection systems.