Numerical Prediciton of Heat Flux from Flame in Room Fire

Summary, in English

A number of CFD (Computational Fluid Dynamics) calculations were carried out to simulate the large scale room corner fire, which is an important scenario for the evaluation of the fire performance of the surface lining material. Considered are turbulent gas flows, turbulent combustion, radiation and heat conduction inside solid boundary. Heat transfer from flame and hot gas is calculated, with the important radiation component presented by discrete transfer (DT) method and the convection heat transfer considered by the wall function. An absorptivity and emissivity model was employed to predict the radiation property of combustion products including soot, CO2 and H2O, which are usually the primary radiating species in the combustion of hydrocarbon fuels. Configurations are a square burner flame in the corner of the standard full scale fire room, with three different standoff distances: 0 cm, 5 cm and 10 cm, and two different burner outputs: 40 kW and 150 ItW. Totally, six cases were studied. The results, including the temperature and heat fluxes, are discussed and compared with experimental measurements.

• Författare: Zhenghua Yan; Göran Holmstedt
• Avdelning/ar: Institutioner vid LTH; Avdelningen för Brandteknik
• Publiceringsår: 1997
• Språk: Engelska
• Publikation/Tidskrift/Serie: LUTVDG/TVBB--3090--SE
• Fulltext: - 838 kB; Download statistics
• Dokumenttyp: Rapport
• Förlag: Department of Fire Safety Engineering and Systems Safety, Lund University
• Ämne: Building Technologies; Other Civil Engineering
• Nyckelord: computational fluid dynamics; combustion; heat transfer; room fire
• Status: Published
• Report number: 3090
• ISBN/ISSN/Övrigt: ISSN: 1102-8246