Experimental characterisation of sprays resulting from impacts of liquid-containing projectiles

Simo Hostikka (Corresponding Author), Ari Silde, Topi Sikanen, Ari Vepsä, Antti Paajanen, Markus Honkanen

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    Modelling and analysing fires following aircraft impacts requires information about the behaviour of liquid fuel. In this study, we investigated sprays resulting from the impacts of water-filled metal projectiles on a hard wall. The weights of the projectiles were in the range of 38-110 kg, with 8.6-68 kg water, and the impact speeds varied between 96 and 169 m/s. The overall spray behaviour was observed with high-speed video cameras. Ultra-high-speed cameras were used in backlight configuration for measuring the droplet size and velocity distributions. The results indicate that the liquid leaves the impact position as a thin sheet of spray in a direction perpendicular to the projectile velocity. The initial spray speeds were 1.5-2.5 times the impact speed, and the Sauter mean diameters were in the 147-344 ?m range. This data can be used as boundary conditions in CFD fire analyses, considering the two-phase fuel flow. The overall spray observations, including the spray deceleration rate, can be used for validating the model.
    Original languageEnglish
    Pages (from-to)388-402
    JournalNuclear Engineering and Design
    Volume295
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Projectiles
    spray
    sprayers
    projectiles
    High speed cameras
    liquid
    Fires
    Liquids
    liquids
    Water
    Liquid fuels
    Deceleration
    Video cameras
    Velocity distribution
    Computational fluid dynamics
    Metals
    Aircraft
    Boundary conditions
    fuel flow
    liquid fuels

    Cite this

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    title = "Experimental characterisation of sprays resulting from impacts of liquid-containing projectiles",
    abstract = "Modelling and analysing fires following aircraft impacts requires information about the behaviour of liquid fuel. In this study, we investigated sprays resulting from the impacts of water-filled metal projectiles on a hard wall. The weights of the projectiles were in the range of 38-110 kg, with 8.6-68 kg water, and the impact speeds varied between 96 and 169 m/s. The overall spray behaviour was observed with high-speed video cameras. Ultra-high-speed cameras were used in backlight configuration for measuring the droplet size and velocity distributions. The results indicate that the liquid leaves the impact position as a thin sheet of spray in a direction perpendicular to the projectile velocity. The initial spray speeds were 1.5-2.5 times the impact speed, and the Sauter mean diameters were in the 147-344 ?m range. This data can be used as boundary conditions in CFD fire analyses, considering the two-phase fuel flow. The overall spray observations, including the spray deceleration rate, can be used for validating the model.",
    author = "Simo Hostikka and Ari Silde and Topi Sikanen and Ari Veps{\"a} and Antti Paajanen and Markus Honkanen",
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    language = "English",
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    journal = "Nuclear Engineering and Design",
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    Experimental characterisation of sprays resulting from impacts of liquid-containing projectiles. / Hostikka, Simo (Corresponding Author); Silde, Ari; Sikanen, Topi; Vepsä, Ari; Paajanen, Antti; Honkanen, Markus.

    In: Nuclear Engineering and Design, Vol. 295, 2015, p. 388-402.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Experimental characterisation of sprays resulting from impacts of liquid-containing projectiles

    AU - Hostikka, Simo

    AU - Silde, Ari

    AU - Sikanen, Topi

    AU - Vepsä, Ari

    AU - Paajanen, Antti

    AU - Honkanen, Markus

    PY - 2015

    Y1 - 2015

    N2 - Modelling and analysing fires following aircraft impacts requires information about the behaviour of liquid fuel. In this study, we investigated sprays resulting from the impacts of water-filled metal projectiles on a hard wall. The weights of the projectiles were in the range of 38-110 kg, with 8.6-68 kg water, and the impact speeds varied between 96 and 169 m/s. The overall spray behaviour was observed with high-speed video cameras. Ultra-high-speed cameras were used in backlight configuration for measuring the droplet size and velocity distributions. The results indicate that the liquid leaves the impact position as a thin sheet of spray in a direction perpendicular to the projectile velocity. The initial spray speeds were 1.5-2.5 times the impact speed, and the Sauter mean diameters were in the 147-344 ?m range. This data can be used as boundary conditions in CFD fire analyses, considering the two-phase fuel flow. The overall spray observations, including the spray deceleration rate, can be used for validating the model.

    AB - Modelling and analysing fires following aircraft impacts requires information about the behaviour of liquid fuel. In this study, we investigated sprays resulting from the impacts of water-filled metal projectiles on a hard wall. The weights of the projectiles were in the range of 38-110 kg, with 8.6-68 kg water, and the impact speeds varied between 96 and 169 m/s. The overall spray behaviour was observed with high-speed video cameras. Ultra-high-speed cameras were used in backlight configuration for measuring the droplet size and velocity distributions. The results indicate that the liquid leaves the impact position as a thin sheet of spray in a direction perpendicular to the projectile velocity. The initial spray speeds were 1.5-2.5 times the impact speed, and the Sauter mean diameters were in the 147-344 ?m range. This data can be used as boundary conditions in CFD fire analyses, considering the two-phase fuel flow. The overall spray observations, including the spray deceleration rate, can be used for validating the model.

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    DO - 10.1016/j.nucengdes.2015.09.008

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    EP - 402

    JO - Nuclear Engineering and Design

    JF - Nuclear Engineering and Design

    SN - 0029-5493

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