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    Internal and external pressure prediction of vented gas explosion in large rooms by using analytical and CFD methods

    258751.pdf (3.251Mb)
    Access Status
    Open access
    Authors
    Li, J.
    Hao, Hong
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Li, J. and Hao, H. 2017. Internal and external pressure prediction of vented gas explosion in large rooms by using analytical and CFD methods. Journal of Loss Prevention in the Process Industries. 49: pp. 367-381.
    Source Title
    Journal of Loss Prevention in the Process Industries
    DOI
    10.1016/j.jlp.2017.08.002
    ISSN
    0950-4230
    School
    Department of Civil Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/LP130100919
    URI
    http://hdl.handle.net/20.500.11937/61317
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents an analytical and a numerical method to predict the internal and external pressures from vented gas explosion in a large enclosure. The first peak internal pressure near the venting of enclosure, which is the primary factor related to the external pressure in far field, is predicted by using analytical correlations. The accuracy of the analytical method is verified by using data from a series of experiments with idealized conditions. However, the incapability of external pressure prediction and over-prediction of peak internal pressure are seen in the realistic scenario by using the analytical approach. Therefore computational Fluid Dynamics (CFD) simulations are consequently performed to accurately estimate both the internal and external pressures of vented explosions. A CFD modelling procedure is suggested in this paper to model the turbulent flame inside the enclosure by using FLACS and to calculate the blast wave propagation with low turbulence in free air by using ANSYS Fluent. This combined CFD modelling approach is proven yielding good predictions of internal and external pressures from vented explosions.

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