Smoke concentrations inside and outside of a corridor-like enclosure |
| |
| Affiliation: | 1. The Institute for Fire Safety Engineering and Technology (FireSERT), University of Ulster, Shore Road, Newtownabbey, Northern Ireland, BT37 0QB, United Kingdom;2. Renewable Resources Associates, Lexington, MA, USA;1. College of Urban Construction, Nanjing Tech University, Nanjing, Jiangsu, 210009, PR China;2. National Defense Engineering Institute, PLA University of Science and Technology, Nanjing, Jiangsu, 210007, PR China;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, China;2. FireSERT, School of Built Environment and Built Environment Research Institute, University of Ulster, Newtownabbey BT38 8GQ, Northern Ireland, United Kingdom;1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China;2. Key Laboratory of Building Fire Protection Engineering and Technology of MPS, Tianjin 300381, China;3. School of Transportation Engineering, Hefei University of Technology, 230009, China;4. College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;1. School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;1. Research Centre for Fire Engineering, Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, Heilongjiang, China |
| |
| Abstract: | This work presents smoke measurements and correlations inside and outside of a corridor-like enclosure fires in order to determine the effects of burning on smoke concentrations inside and outside the enclosure. Thirty eight experiments were performed in a three metre long corridor-like enclosure having a cross section 0.5 m×0.5 m, door like openings in the front panel and a gaseous burner located near the closed end. Smoke concentrations were measured at two locations inside the enclosure and also in the exhaust duct of a hood collecting the fire gases from the enclosure. It was found that smoke concentration in the exhaust duct decreased whereas smoke concentration inside the enclosure increased after the flames started moving towards the opening and external burning occurred. This increased smoke concentration inside the enclosure was caused by reversion of the flow pattern inside the enclosure after the flames moved past a point towards the opening. Namely, the flow pattern changed direction behind the flame front in the sense that hot gases in the upper layer were travelling backwards towards the closed end of the corridor thus contributing to smoke increase inside the enclosure. This change of flow pattern was confirmed in all experiments by bidirectional probe velocity measurements in the upper and lower layer as well as by oxygen concentrations and temperature measurements inside the enclosure. These results are useful for CFD validation and specifically applicable for assessing smoke hazards in corridor fires in buildings where smoke concentrations can be much larger than anticipated owing to leakage to adjacent rooms behind a moving flame front. |
| |
| Keywords: | Smoke Compartment fires Underventilated fires Smoke concentration Corridor fires |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
