Underventilerad brand
Författare
Summary, in English
Combustion of hydrocarbons in under-ventilated conditions has been studied experimentally and simulated with the CFD-code SOFIE. This report covers the experimental study in a 1/3 scale model of the ISO room corner test (ISO) 9705). The CFD-simulation part of the project has been published
earlier in a SP-Report 1996:41 “CFD Modelling if under-ventilated Fires” by Heimo Touvinen and presented at the Second International Seminar on Fire-and Explosion hazard of Substances and venting of Deflagrations, Moscow 1997 and is published in the proceedings of the conference.
In these experiments heptane was burnt in a 1/3 scale room model. The global equivalence ratio (GER) was changed during the experiments from a low value, (well ventilated fire) up to 1.8. At higher equivalence ratios the fire got unstable with violent fluctuations and flames now and then emerging out of the room. The following quantities were measured as a function of time in the experiments:
Inside the room; Gas temperatures at eight levels (vertical array) in the corner of the room; Surface
temperatures at six positions (three on the walls and three on the ceiling); Weight of the liquid fuel. In
the doorway; Gas temperatures at seven levels (vertical array) in the centre of the doorway; Gas concentrations in the doorway (CO, CO2,) Global equivalence ratio in the doorway (Phi-meter). In the exhaust duct; Gas concentration(CO, CO2, O2, and HC); Light attenuation due to smoke; Pressure drop from a bi-directional probe mounted in the centre of the duct; Gas temperature in the centre of the
duct.
The following quantities has been derived from the measurement: Mass loss rate of fuel; Mass flow in
the exhaust duct; Global equivalence ratio; Rate of heat release; Yields of CO, CO2, HC and soot at different equivalence ratios up to 1.8.
The report includes three appendix, Appendix A (calibration procedures) Appendix B (derived
variables as a function of time) and Appendix C 1-2 (raw data files of the experiments).
earlier in a SP-Report 1996:41 “CFD Modelling if under-ventilated Fires” by Heimo Touvinen and presented at the Second International Seminar on Fire-and Explosion hazard of Substances and venting of Deflagrations, Moscow 1997 and is published in the proceedings of the conference.
In these experiments heptane was burnt in a 1/3 scale room model. The global equivalence ratio (GER) was changed during the experiments from a low value, (well ventilated fire) up to 1.8. At higher equivalence ratios the fire got unstable with violent fluctuations and flames now and then emerging out of the room. The following quantities were measured as a function of time in the experiments:
Inside the room; Gas temperatures at eight levels (vertical array) in the corner of the room; Surface
temperatures at six positions (three on the walls and three on the ceiling); Weight of the liquid fuel. In
the doorway; Gas temperatures at seven levels (vertical array) in the centre of the doorway; Gas concentrations in the doorway (CO, CO2,) Global equivalence ratio in the doorway (Phi-meter). In the exhaust duct; Gas concentration(CO, CO2, O2, and HC); Light attenuation due to smoke; Pressure drop from a bi-directional probe mounted in the centre of the duct; Gas temperature in the centre of the
duct.
The following quantities has been derived from the measurement: Mass loss rate of fuel; Mass flow in
the exhaust duct; Global equivalence ratio; Rate of heat release; Yields of CO, CO2, HC and soot at different equivalence ratios up to 1.8.
The report includes three appendix, Appendix A (calibration procedures) Appendix B (derived
variables as a function of time) and Appendix C 1-2 (raw data files of the experiments).
Avdelning/ar
Publiceringsår
2004
Språk
Svenska
Publikation/Tidskrift/Serie
LUTVDG/TVBB--3131--SE
Fulltext
Dokumenttyp
Rapport
Förlag
Fire Safety Engineering and Systems Safety
Ämne
- Other Civil Engineering
- Building Technologies
Nyckelord
- nderventilation
- fire
- underventilerad brand
Status
Published
Report number
3131
ISBN/ISSN/Övrigt
- ISSN: 1402-3504