期刊
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
卷 49, 期 -, 页码 652-659出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jlp.2017.04.029
关键词
Pool fire; Ceiling; Flame extent; FDS; Stoichiometric mixture fraction
资金
- Chinese Scholarship Council [201306565020]
- Hellenic General Secretariat for Research & Technology under Operational Program Education and lifelong learning [ERC-12]
- European Union (European Social Fund) and national resources
The purpose of this work is to establish dimensionless correlations for the flame extent under a ceiling that can be used for large-scale calculations of radiative heat fluxes for which numerical simulations may be prohibitive. Towards this objective, this paper presents a numerical study of the flame height in an open pool fire and the subsequent flame extent under the ceiling. The stoichiometric mixture fraction is used to define the continuous flame height which also coincides with the maximum mean temperature along the centerline of the fire. The size of the pool fire is 0.1 m x 0.1 m having heat release rates (HRRs) from 2 to 100 kW for two ceiling heights of 30 and 50 cm. The predicted free flame height and horizontal flame extent are compared to existing correlations and experimental data in the literature. It is found that the predicted continuous flame height is about three fifths that of the experimental mean flame height reported in the literature. The predicted horizontal flame extent also agrees well with existing experimental correlations, although some difference may indicate that the relation between the mean and continuous flame heights derived for an open free pool fire may no longer apply due to the presence of the ceiling which affects air entrainment and the turbulence of the ceiling flame jet. (C) 2017 Elsevier Ltd. All rights reserved.
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