The effect of Air Flow Rate on Smoke Stratification in Longitudinal Tunnel Ventilation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27200%2F19%3A10243961" target="_blank" >RIV/61989100:27200/19:10243961 - isvavai.cz</a>

Alternative codes found

RIV/61989100:27350/19:10243961

Result on the web

<a href="https://actamont.tuke.sk/pdf/2019/n3/1pokorny.pdf" target="_blank" >https://actamont.tuke.sk/pdf/2019/n3/1pokorny.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The effect of Air Flow Rate on Smoke Stratification in Longitudinal Tunnel Ventilation

Original language description

The construction of tunnels is associated with mining. For safety and suitable working conditions, it is necessary to ensure that there is suitable ventilation during construction. During operation, tunnels form the infrastructure of the area, which has a number of characteristics. Tunnel ventilation is designed with regards to many different factors. Longitudinal ventilation is especially used in one-way, extra-urban tunnels but in some cases also in urban or two-way tunnels. The article describes the purpose and types of tunnel ventilation, focusing on longitudinal ventilation and ventilation design strategy. Longitudinal tunnel ventilation is the cause of significant turbulence that affects the smoke stratification. The article compares different tunnel ventilation options in terms of selected strategies and the different values of applied airflow rates. A case study was conducted on the Klimkovice road tunnel in the Czech Republic using the fire model from the Fire Dynamics Simulator. The study compares the effect of airflow rate on smoke stratification. The study was conducted with air flow rate values of 0 to 5 m.s(-1). The results of the study show that even with lower airflow rates, the smoke build-up is so significant that the safety of individuals in the tunnel cannot be ensured. The dynamicity of fire is also an important factor. Opting for a lower airflow rate strategy because of higher expected congestion or other factors is a questionable practice. Greater airflow rates, however, create better conditions for evacuating individuals, although it is also necessary to combine smoke stratification options with the selected ventilation strategy.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

50902 - Social sciences, interdisciplinary

Project

<a href="/en/project/VH20182020042" target="_blank" >VH20182020042: Population protection in spatial planning and setting of technical conditions for buildings design</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Montanistica Slovaca

ISSN

1335-1788

e-ISSN

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Volume of the periodical

24

Issue of the periodical within the volume

3

Country of publishing house

SK - SLOVAKIA

Number of pages

15

Pages from-to

173-187

UT code for WoS article

000505598600001

EID of the result in the Scopus database

2-s2.0-85078812420