Ghosting flame mechanism under different extinctions modes in ceiling vent cabin. (10th February 2021)

• Record Type: Journal Article
• Authors: Cong, Lixin; Lu, Mingfei; Xu, Chaoyi
• Is Part Of: Fire and materials. Volume 46:Number 1(2022)
• Page Start: 69
• Page End: 79
• Publication Date: 2021-02-10
• Subjects: ceiling vent -- extinction mode -- ghosting flame -- ship engine room fire; Fire-testing -- Periodicals; Fire -- Periodicals; Materials -- Periodicals; 620.11217
• DOI: 10.1002/fam.2948
• Languages: English
• ISSNs: 0308-0501

Abstract

Summary: In this paper, large eddy simulation coupled with a low Mach number compressible thermal‐drive flow model had been utilized to investigate the development of large‐scale engine room fire, and the characteristics of engine room fire were analyzed through based upon the distinctive fire extinction behavior. Results indicated that extinction modes of engine room fire could be divided into oxygen control type and fuel control type. And the flame morphology could be divided into four stages: conical flame, pulsating flame, column flame, and ghosting flame. The appearance of the ghosting flame was affected by the extinction mode, but there were obvious differences in the causes of ghosting flame between the two modes. The cause of ghosting flame was related to the distribution of temperature field under the fuel control type, while the occurrence of ghosting flame in oxygen control type was mainly affected by oxygen concentration. Deflagration should be avoided when extinguishing fire by sealing the cabin.