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A global model for flame pulsation frequency of buoyancy-controlled rectangular gas fuel fire with different boundaries

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Huang, Xianjia , Huang, Tao , Zhuo, Xunjia , Tang , Fei , He, Le and Wen, Jennifer X. (2021) A global model for flame pulsation frequency of buoyancy-controlled rectangular gas fuel fire with different boundaries. Fuel, 289 . 119857. doi:10.1016/j.fuel.2020.119857

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Official URL: https://doi.org/10.1016/j.fuel.2020.119857

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Abstract

Pulsation frequency is an important characteristic parameter for buoyancy-controlled fuel diffusion flames. Fire experiments of a rectangular source with different aspect ratios were conducted in an open space and against sidewalls made from a calcium silicate board. Due to the blocking effect to restrict air entrainment to fire plumes, sidewall significantly reduced the flame pulsation frequency. Furthermore, the effect of the fuel exit velocity on the pulsation frequency became intense as the aspect ratio of the rectangle was increased to 7.45. Based on the modified hydraulic diameter for a rectangular fire source with a sidewall and corner, a global model was developed for predicting the flame pulsation frequency of the rectangular fire source with free, sidewall, and corner boundaries. The coefficient of determination of this improved model is 0.9991, and the local errors of this model are less than 15% considering all of the experimental data in the present work and available in the literature. This work provides a method for predicting flame pulsation frequency, accounting for sidewall effect and aspect ratio.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH): Flame, Fire, Flame spread -- Mathematical models, Liquid fuels, Combustion
Journal or Publication Title: Fuel
Publisher: Elsevier Ltd
ISSN: 0016-2361
Official Date: 1 April 2021
Dates:
DateEvent
1 April 2021Published
2020Available
23 November 2020Accepted
Date of first compliant deposit: 15 December 2020
Volume: 289
Article Number: 119857
DOI: 10.1016/j.fuel.2020.119857
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
2016YFC0800100National Key Research and Development Program of China Stem Cell and Translational Researchhttp://dx.doi.org/10.13039/501100013290
52076066[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
51776060[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
202002030124Guangzhou Science and Technology Plan Program of ChinaUNSPECIFIED

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