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

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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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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.

U2 - 10.1016/j.nucengdes.2015.09.008

DO - 10.1016/j.nucengdes.2015.09.008

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JO - Nuclear Engineering and Design

JF - Nuclear Engineering and Design

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