The railway line operated by Zentralbahn Luzern (zb) was expanded to two tracks and rerouted underground on the section from Lucerne Station to Kriens Mattenhof Station. The new route section consists of a tunnel about 550 m long constructed by underground means, an underground railway station nearly 300 m long with three access points, a cut-and-cover tunnel about 470 m long and a ramp 140 m long, the total length thus being 1460 m. The underground railway station is equipped with a smoke extraction system. The latter consists of a smoke extraction duct with openings along the platform, two axial fans in a ventilation building and an exhaust air flue. During project approval the Swiss Federal Office of Transport (FOT) stipulated that the performance of the smoke extraction system be verified by testing prior to commissioning and that the achievement of safety objectives be documented. For this reason, a test concept was developed that not only comprises aerodynamic tests and hot smoke tests on a 1:1 scale with fire loads of 1 MW max. but also involves a mathematical proof based on three-dimensional flow simulations (3D computational fluid dynamics or 3D CFD). As a result, it was possible to produce objective evidence that the safety objectives were achieved in a fire scenario with a heat release of 10 MW. In addition, the use of computational simulations for obtaining objective evidence meant it was possible to investigate certain influences more closely within the scope of a sensitivity analysis.


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    Titel :

    Analysis of a 10 MW fire in an underground railway station using full scale tests and CFD


    Beteiligte:
    Rodler, J. (Autor:in) / Bassler, A. (Autor:in) / Schnell, E. (Autor:in)


    Erscheinungsdatum :

    2014


    Format / Umfang :

    8 Seiten, Bilder, Tabellen, 11 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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