Deflagration-to-detonation transition in an unconfined space: Expanding hydrogen-oxygen flames

Andrey Koksharov; Leonid Kagan; Gregory Sivashinsky

doi:10.1016/j.proci.2020.08.051

Deflagration-to-detonation transition in an unconfined space: Expanding hydrogen-oxygen flames

Andrey Koksharov, Leonid Kagan^*, Gregory Sivashinsky

^*Corresponding author for this work

School of Mathematical Sciences

Research output: Contribution to journal › Conference article › peer-review

8 Scopus citations

Abstract

The problem of deflagration-to-detonation transition in an unconfined environment was studied wth a freely expanding self-accelerating fractal-like H₂-O₂ flame as an example. Deflagration-to-detonation transition was indeed possible provided the flame is large enough. The transition occurred prior to merging of the flame with the flame-supported precursor shock. The pre-transition flame did not reach the threshold of CJ-deflagration. Numerical simulations employed are based on the recently developed pseudospectral method with time and space adaptation.

Original language	English
Pages (from-to)	3505-3511
Number of pages	7
Journal	Proceedings of the Combustion Institute
Volume	38
Issue number	3
DOIs	https://doi.org/10.1016/j.proci.2020.08.051
State	Published - 2021
Event	38th International Symposium on Combustion, 2021 - Adelaide, Australia Duration: 24 Jan 2021 → 29 Jan 2021

Funding

Funders	Funder number
United States - Israel Binational Science Foundation	2012–057
United States - Israel Binational Science Foundation
Israel Science Foundation	335/13
Israel Science Foundation

Keywords

Accelerating flames
Computational reactive fluid dynamics
Deflagration-to-detonation transition
Thermal runaway of fast flames

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10.1016/j.proci.2020.08.051

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title = "Deflagration-to-detonation transition in an unconfined space: Expanding hydrogen-oxygen flames",

abstract = "The problem of deflagration-to-detonation transition in an unconfined environment was studied wth a freely expanding self-accelerating fractal-like H2-O2 flame as an example. Deflagration-to-detonation transition was indeed possible provided the flame is large enough. The transition occurred prior to merging of the flame with the flame-supported precursor shock. The pre-transition flame did not reach the threshold of CJ-deflagration. Numerical simulations employed are based on the recently developed pseudospectral method with time and space adaptation.",

keywords = "Accelerating flames, Computational reactive fluid dynamics, Deflagration-to-detonation transition, Thermal runaway of fast flames",

author = "Andrey Koksharov and Leonid Kagan and Gregory Sivashinsky",

note = "Funding Information: These studies were supported by the US- Israel Binational Science Foundation (Grant 2012–057 ) and the Israel Science Foundation (Grant 335/13 ). ; 38th International Symposium on Combustion, 2021 ; Conference date: 24-01-2021 Through 29-01-2021",

year = "2021",

doi = "10.1016/j.proci.2020.08.051",

language = "אנגלית",

volume = "38",

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journal = "Proceedings of the Combustion Institute",

issn = "1540-7489",

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T1 - Deflagration-to-detonation transition in an unconfined space

T2 - 38th International Symposium on Combustion, 2021

AU - Koksharov, Andrey

AU - Kagan, Leonid

AU - Sivashinsky, Gregory

N1 - Funding Information: These studies were supported by the US- Israel Binational Science Foundation (Grant 2012–057 ) and the Israel Science Foundation (Grant 335/13 ).

PY - 2021

Y1 - 2021

N2 - The problem of deflagration-to-detonation transition in an unconfined environment was studied wth a freely expanding self-accelerating fractal-like H2-O2 flame as an example. Deflagration-to-detonation transition was indeed possible provided the flame is large enough. The transition occurred prior to merging of the flame with the flame-supported precursor shock. The pre-transition flame did not reach the threshold of CJ-deflagration. Numerical simulations employed are based on the recently developed pseudospectral method with time and space adaptation.

AB - The problem of deflagration-to-detonation transition in an unconfined environment was studied wth a freely expanding self-accelerating fractal-like H2-O2 flame as an example. Deflagration-to-detonation transition was indeed possible provided the flame is large enough. The transition occurred prior to merging of the flame with the flame-supported precursor shock. The pre-transition flame did not reach the threshold of CJ-deflagration. Numerical simulations employed are based on the recently developed pseudospectral method with time and space adaptation.

KW - Accelerating flames

KW - Computational reactive fluid dynamics

KW - Deflagration-to-detonation transition

KW - Thermal runaway of fast flames

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SN - 1540-7489

VL - 38

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JO - Proceedings of the Combustion Institute

JF - Proceedings of the Combustion Institute

IS - 3

Y2 - 24 January 2021 through 29 January 2021

ER -

Deflagration-to-detonation transition in an unconfined space: Expanding hydrogen-oxygen flames

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