Numerical simulations of liquid spreading and fires following an aircraft impact

Topi Sikanen, Simo Hostikka

    Research output: Contribution to journalArticleScientificpeer-review

    18 Citations (Scopus)


    In this paper, we present a methodology for predicting the spreading and combustion of liquid fuel released from an aircraft impact. Calculations were done with Fire Dynamics Simulator, and the aircraft impact was modeled as a spray boundary condition. The spray boundary condition was developed and validated by experiments using water-filled missiles. The predicted liquid front speeds were compared with water spray front propagation data, and the predicted lifetimes and diameters of fireballs were compared with experimental correlations. A full-scale simulation of the aircraft impact on a nuclear island was performed. The simulation results were used to assess the adequacy of physical separation in the case of aircraft impact. We concluded that 10%-20% of the fuel involved in the crash will accumulate in pools around the building.
    Original languageEnglish
    Pages (from-to)147-162
    JournalNuclear Engineering and Design
    Publication statusPublished - 1 Jul 2017
    MoE publication typeA1 Journal article-refereed


    • fireball
    • plane crash
    • physical separation
    • fuel pooling
    • nuclear power plant


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