Effect of ceiling height on flame spread over horizontal poly(methyl methacrylate) slabs in corridor

Case Studies in Thermal Engineering

Xinle Zhang¹  Chunjie Zhai²  Fei Peng²  Jie Li³ 

[1] Corresponding author.;College of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, Hunan, 410114, China;Nanjing Forest Police College, Department of Forest Fire Protection, Nanjing, Jiangsu, 210023, China;

关键词: Flame spread;    Corridor;    Poly(methyl methacrylate);    Ceiling;    Heat release rate;    Mass loss rate;   

DOI  :  

来源: DOAJ

【 摘 要 】

A series of experiments of poly(methyl methacrylate) (PMMA) slabs were conducted at different ceiling height to investigate the horizontal flame spread characteristics of combustibles polymers beneath the corridor ceiling. The growth of flames beneath corridor ceiling have three different fire behaviors depending on sample width and ceiling height, namely steady regime, slowly increasing regime and rapid grown regime. The temperature distribution at ceiling of steady horizontal PMMA fires are exponential function to the longitudinal distance for both upstream and downstream. Flame spread rate in open space shows a “dip” at W=5 cm. But the “dip” disappeared in corridor because of the increasing radiative heat flux. The flame spread rate and mass loss rate both increases with sample width and decreasing ceiling height.

【 授权许可】

Unknown