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Full-scale fire tests with a commuter train in a tunnel
Mälardalen University, School of Business, Society and Engineering. SP Brandteknik. (MERO)ORCID iD: 0000-0001-6758-6067
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2012 (English)Report (Other academic)
Abstract [en]

Three large scale fire tests were performed with a commuter train inside a tunnel. Two of

the tests used an ignition source inside the train carriage and in one test a pool fire was

placed under the carriage. Both tests wire a fire initiated inside the carriage developed to

flashover conditions. The difference between the two cases was that in one test a standard

X1 carriage was used, while in the second case an X1 carriage was refurbished with more

modern seats and a non-combustible aluminium lining on the walls and in the ceiling. The

time to flashover was significantly different between the two test cases. In the test with

the original seats and linings (test 2) the maximum heat release rate (HRR) was 76.7 MW

and occurred 12.7 min after ignition. The maximum HRR in the case where more modern

seats and aluminium lining were used (test 3), was 77.4 MW and occurred after 117.9

min. For these HRR calculations, the maximum gas temperature near the tunnel ceiling

was used. The corresponding HRR calculated with oxygen consumption calorimetry was

approximately 75 MW in test 3. Based on the temperature measurements in the carriage,

the carriage was flashed over after 12 min in test 2 and after 119 min in test 3.

The main reason for the difference was the difference in initial combustion behaviour

between the case with combustible wall and ceiling lining, and the case with noncombustible

(aluminium) lining as the exposed interior surface. In the case with

combustible lining a ceiling flame was developed, radiating towards the seats and the

luggage spreading the fire more rapidly than in the case without exposed combustible

lining.

The maximum HRR calculated from the experimental results are significantly higher than

those obtained in other documented test series. The luggage in, under or between different

seats was found to increase the fire spread significantly in both cases. This conclusion

was drawn from other tests performed within the same project prior to the full-scale tests

which are reported in full elsewhere.

Place, publisher, year, edition, pages
Borås: SP Sveriges Tekniska Forskningsinstitut , 2012.
Series
SP Report, ISSN 0284-5172 ; 2012:05
National Category
Engineering and Technology
Research subject
Energy- and Environmental Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-22844ISBN: 978-91-87017-22-3 (print)OAI: oai:DiVA.org:mdh-22844DiVA, id: diva2:664641
Available from: 2013-11-15 Created: 2013-11-15 Last updated: 2014-01-27Bibliographically approved

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Lönnermark, AndersKumm, Mia

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