SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES

Sebastian Ukleja, Michael Delichatsios, Jianping Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work compares smoke measurements inside and outside of corridor-like enclosures for under ventilated fires to determine the smoke concentrations inside and outside the enclosure having also flames emerging outside the opening. Thirty five experiments were performed in a three metre long corridor-like compartment (of cross section 0.5 times 0.5 metres) having a gaseous burner located near the closed end. Smoke concentrations were measured in two locations inside the enclosure and also in the exhaust duct of a hood collecting the fire gases from the testing rig. In addition, the flow pattern was examined by bidirectional probes, temperature measurements and oxygen concentrations in the upper and lower layer inside the enclosure. It was found that smoke concentrations decreased in the exhaust duct after flames emerged from the opening relative to levels measured before external burning. At the same time, smoke concentrations inside increased compared to fire without flames outside. This difference in concentrations is due to the reversion of flow pattern inside the enclosure before and after the flames moved towards the opening as manifested by the bidirectional probe velocity and oxygen concentrations measurements. Namely, the flow pattern changed behind the travelling flame front, i.e. hot gases in the upper layer were travelling backwards towards the closed end of the corridor thus contributing to smoke accumulation inside the enclosure whereas they were travelling the opposite way ahead of the flame front.
LanguageEnglish
Title of host publicationUnknown Host Publication
Number of pages12
Publication statusPublished - 2011
Event7th Mediterranean Combustion Symposium - Chia Laguna, Cagliari, Sardinia, Italy
Duration: 1 Jan 2011 → …

Conference

Conference7th Mediterranean Combustion Symposium
Period1/01/11 → …

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smoke
flow pattern
probe
oxygen
gas
corridor
cross section
experiment
temperature

Cite this

Ukleja, S., Delichatsios, M., & Zhang, J. (2011). SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES. In Unknown Host Publication
Ukleja, Sebastian ; Delichatsios, Michael ; Zhang, Jianping. / SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES. Unknown Host Publication. 2011.
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title = "SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES",
abstract = "This work compares smoke measurements inside and outside of corridor-like enclosures for under ventilated fires to determine the smoke concentrations inside and outside the enclosure having also flames emerging outside the opening. Thirty five experiments were performed in a three metre long corridor-like compartment (of cross section 0.5 times 0.5 metres) having a gaseous burner located near the closed end. Smoke concentrations were measured in two locations inside the enclosure and also in the exhaust duct of a hood collecting the fire gases from the testing rig. In addition, the flow pattern was examined by bidirectional probes, temperature measurements and oxygen concentrations in the upper and lower layer inside the enclosure. It was found that smoke concentrations decreased in the exhaust duct after flames emerged from the opening relative to levels measured before external burning. At the same time, smoke concentrations inside increased compared to fire without flames outside. This difference in concentrations is due to the reversion of flow pattern inside the enclosure before and after the flames moved towards the opening as manifested by the bidirectional probe velocity and oxygen concentrations measurements. Namely, the flow pattern changed behind the travelling flame front, i.e. hot gases in the upper layer were travelling backwards towards the closed end of the corridor thus contributing to smoke accumulation inside the enclosure whereas they were travelling the opposite way ahead of the flame front.",
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year = "2011",
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Ukleja, S, Delichatsios, M & Zhang, J 2011, SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES. in Unknown Host Publication. 7th Mediterranean Combustion Symposium, 1/01/11.

SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES. / Ukleja, Sebastian; Delichatsios, Michael; Zhang, Jianping.

Unknown Host Publication. 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES

AU - Ukleja, Sebastian

AU - Delichatsios, Michael

AU - Zhang, Jianping

PY - 2011

Y1 - 2011

N2 - This work compares smoke measurements inside and outside of corridor-like enclosures for under ventilated fires to determine the smoke concentrations inside and outside the enclosure having also flames emerging outside the opening. Thirty five experiments were performed in a three metre long corridor-like compartment (of cross section 0.5 times 0.5 metres) having a gaseous burner located near the closed end. Smoke concentrations were measured in two locations inside the enclosure and also in the exhaust duct of a hood collecting the fire gases from the testing rig. In addition, the flow pattern was examined by bidirectional probes, temperature measurements and oxygen concentrations in the upper and lower layer inside the enclosure. It was found that smoke concentrations decreased in the exhaust duct after flames emerged from the opening relative to levels measured before external burning. At the same time, smoke concentrations inside increased compared to fire without flames outside. This difference in concentrations is due to the reversion of flow pattern inside the enclosure before and after the flames moved towards the opening as manifested by the bidirectional probe velocity and oxygen concentrations measurements. Namely, the flow pattern changed behind the travelling flame front, i.e. hot gases in the upper layer were travelling backwards towards the closed end of the corridor thus contributing to smoke accumulation inside the enclosure whereas they were travelling the opposite way ahead of the flame front.

AB - This work compares smoke measurements inside and outside of corridor-like enclosures for under ventilated fires to determine the smoke concentrations inside and outside the enclosure having also flames emerging outside the opening. Thirty five experiments were performed in a three metre long corridor-like compartment (of cross section 0.5 times 0.5 metres) having a gaseous burner located near the closed end. Smoke concentrations were measured in two locations inside the enclosure and also in the exhaust duct of a hood collecting the fire gases from the testing rig. In addition, the flow pattern was examined by bidirectional probes, temperature measurements and oxygen concentrations in the upper and lower layer inside the enclosure. It was found that smoke concentrations decreased in the exhaust duct after flames emerged from the opening relative to levels measured before external burning. At the same time, smoke concentrations inside increased compared to fire without flames outside. This difference in concentrations is due to the reversion of flow pattern inside the enclosure before and after the flames moved towards the opening as manifested by the bidirectional probe velocity and oxygen concentrations measurements. Namely, the flow pattern changed behind the travelling flame front, i.e. hot gases in the upper layer were travelling backwards towards the closed end of the corridor thus contributing to smoke accumulation inside the enclosure whereas they were travelling the opposite way ahead of the flame front.

M3 - Conference contribution

BT - Unknown Host Publication

ER -

Ukleja S, Delichatsios M, Zhang J. SMOKE CONCENTRATIONS INSIDE AND OUTSIDE OF CORRIDOR-LIKE ENCLOSURE FIRES. In Unknown Host Publication. 2011