Heat transfer to an unconfined ceiling from an impinging buoyant diffusion flame

W. G. Weng, Yuji Hasemi

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Impinging flames are used in fire safety research, industrial heating and melting, and aerospace applications. Multiple modes of heat transfer, such as natural convection, forced convection and thermal radiation, etc. are commonly important in those processes. However, the detailed heat transfer mechanisms are not well understood. In this paper, a model is developed to calculate the thermal response of an unconfined nonburning ceiling from an impinging buoyant diffusion flame. This model uses an algorithm for conduction into the ceiling material. It takes account of heat transfer due to radiation from the fire source to the ceiling surface, and due to reradiation from the ceiling surface to other items. Using experimental data, the convective heat transfer coefficient at lower surface is deduced from this model. In addition, the predicted heat fluxes are compared with the existing experimental data, and the comparison results validate the presented model. It is indicated that this model can be used to predict radial-dependent surface temperature histories under a variety of different realistic levels of fire energy generation rates and fire-to-ceiling separation distance.

    Original languageEnglish
    Pages (from-to)652-659
    Number of pages8
    JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
    Volume42
    Issue number7
    DOIs
    Publication statusPublished - 2006 May

    Fingerprint

    ceilings
    diffusion flames
    Ceilings
    heat transfer
    Heat transfer
    Fires
    Aerospace applications
    Industrial heating
    forced convection
    convective heat transfer
    Forced convection
    Heat radiation
    thermal radiation
    radiation
    heat transfer coefficients
    Natural convection
    free convection
    Heat transfer coefficients
    surface temperature
    Heat flux

    Keywords

    • Convective heat transfer
    • Heat transfer
    • Impinging diffusion flame
    • Unconfined ceiling

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Computational Mechanics
    • Physical and Theoretical Chemistry
    • Fluid Flow and Transfer Processes

    Cite this

    Heat transfer to an unconfined ceiling from an impinging buoyant diffusion flame. / Weng, W. G.; Hasemi, Yuji.

    In: Heat and Mass Transfer/Waerme- und Stoffuebertragung, Vol. 42, No. 7, 05.2006, p. 652-659.

    Research output: Contribution to journalArticle

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