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Stabilized combustion of circular fuel duct with liquid oxygen

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Title: Stabilized combustion of circular fuel duct with liquid oxygen
Authors: Tsuji, Ayumu Browse this author
Saito, Yuji Browse this author
Kamps, Landon Browse this author
Wakita, Masashi Browse this author →KAKEN DB
Nagata, Harunori Browse this author →KAKEN DB
Keywords: Stabilized combustion
Flame spread
Solid fuel
Liquid oxidizer
Flame spread rate modeling
Issue Date: 10-Apr-2021
Publisher: Elsevier
Journal Title: Proceedings of The Combustion Institute
Volume: 38
Issue: 3
Start Page: 4845
End Page: 4855
Publisher DOI: 10.1016/j.proci.2020.07.001
Abstract: This research is an investigation of the flame spread opposed to a liquid oxidizer flow in a solid fuel duct. Several firing tests were conducted using liquid oxygen as the oxidizer and solid poly methyl methacrylate (PMMA) as the fuel. The results indicate that the flame spread rate decreased with increasing oxidizer port velocity and decreasing port diameter. This study reveals through visual confirmations and empirical correlations of the flame spread rate that the flame spread opposed to liquid oxygen in a solid fuel duct can be classified as stabilized combustion. Extinction and abnormal regression were observed when oxidizer port velocity was high and port diameter was small. Furthermore, the cooling of the solid fuel by the liquid oxygen flow had a strong effect on the transition between normal regression and extinction, or abnormal regression. A model of the flame spread rate which considers the heat balance at the fuel surface assuming a fully developed thermal boundary layer is introduced and shown to agree well with the experimental results. Lastly, it is revealed that the difference in kinematic viscosity between liquid oxygen and gaseous oxygen is the main reason dependency of port diameter on flame spread rates differs between the liquid oxygen tests in this study and gaseous oxygen tests in previous studies.
Rights: © <2021>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 永田 晴紀

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