The use and predictive capability of CFD for fully developed natural fires in large compartments

摘要: The purpose of the present study is to explore and validate efficiency accuracy predictive capability CFD models for fully developed natural fires in large compartments. FDS software was used simulate three large-scale fire tests. tests (nine total) had been carried out 1993 at Cardington UK, collaboration with BRE/FRS CORUS (British Steel that time). main parameters chosen are compartments dimensions, load, ventilation opening, ignition type. duration tests, starting from until extinction fire, between 70-120 min source wooden cribs. simulations were full time scale. model solves numerically well known Navier-Stokes equations emphasis on smoke heat transport fires. It uses a mixture fraction combustion assuming mixing controlled, reaction fuel oxygen infinitely fast. Turbulence treated by means Smagorinsky form Large Eddy Simulation, while thermal radiation computed using finite volume technique. Despite assumptions made complex phenomena involved, correlation computational experimental results very good agreement. spread modelled accurately difference peak temperatures 5%-20%. However sensitive some input so each scenario should be individually robust accurate solution.