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  • CFD-based analysis of thermocouple measurements in the fire decay and cooling phases in relation to the adiabatic surface temperature [Elektronski vir]
    Put, Florian ...
    The definition of the thermal boundary conditions is usually the first step in a structural fire engineering calculation and is often represented by a single time-temperature curve, which should be ... referred to as an Adiabatic Surface Temperature. The validation of thermal boundary condition models is commonly performed based on data from large-scale fire experiments, in which thermocouple measurements provide temperature data, with focus on the post-flashover heating and fully-developed phases of a fire. The present study investigates whether thermocouple data obtained during the decay and cooling phases can serve as input for structural fire engineering calculations, and whether they can be used to compare against Adiabatic Surface Temperature models. To this purpose, a series of canonical FDS simulations is performed, representing the thermal boundary conditions that would be encountered in the fire decay and cooling phases, to study the impact of smoke and radiation on thermocouple measurements. The dynamically changing environment in which the thermocouples are situated during the decay and cooling phases (increased radiation due to dilution of the smoke) is shown to be incompatible with fixed values for the convective heat transfer coefficient and the effective emissivity, as used in the framework of the Adiabatic Surface Temperature.
    Source: Proceedings of the 13th International Conference on Structures in Fire : hosted by University of Coimbra, [19 June to 21 June 2024] [Elektronski vir] (Str. 1009-1019)
    Type of material - conference contribution ; adult, serious
    Publish date - 2024
    Language - english
    COBISS.SI-ID - 204394755

    Link(s):

    https://events.cmm.pt/event/content/index.php?target=showContent&id_pagina=126&defLang=2&event=10

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