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Effects of jet in crossflow on flame acceleration and deflagration to detonation transition in methane-oxygen mixture

Effects of jet in crossflow on flame acceleration and deflagration to detonation transition in methane-oxygen mixture
Effects of jet in crossflow on flame acceleration and deflagration to detonation transition in methane-oxygen mixture
The fluidal jet turbulator has been a novel perturbation generator in the pulse-detonation engines research field for the past few years. In this paper, an experiment is performed to study the deflagration to detonation transition (DDT) process in a detonation chamber with a reactive transverse methane-oxygen mixture jet in crossflow (JICF). The jet injection arrangement is fundamentally investigated, including single jet and various double jets patterns. Corresponding two-dimensional direct numerical simulations with a multistep chemical kinetics mechanism are employed for analyzing details in the flow field, and the interaction between the vortex and flame temporal evolution is characterized. Both the experiments and simulations demonstrate that the JICF can distinctly accelerate flame propagation and shorten the DDT time and distance. The vortex stream induced by the jet distorts and wrinkles the flame front resulting in local flame acceleration. Moreover, the double jet patterns enhance flame acceleration more than the single jet injection because of the intrinsic counter-rotating vortex pairs and enhanced turbulence intensity.
flame acceleration, deflagration to detonation transition, jet in crossflow;, flame-vortex interactions, methane flame
0010-2180
69-80
Peng, Han
5ffe6ca6-55fd-44ce-ac36-a80b907c7e1e
Huang, Yue
b61d46a7-90a8-4c1f-bd59-de326fc2eb87
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Luan, Zhenye
8cf68510-8da1-4040-9ebc-820bcc311a4c
Xing, Fei
15735012-4cfb-429c-ab69-b851cdc06c0b
You, Yancheng
09fe5931-deb7-4219-9655-697b3c64f303
Peng, Han
5ffe6ca6-55fd-44ce-ac36-a80b907c7e1e
Huang, Yue
b61d46a7-90a8-4c1f-bd59-de326fc2eb87
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Luan, Zhenye
8cf68510-8da1-4040-9ebc-820bcc311a4c
Xing, Fei
15735012-4cfb-429c-ab69-b851cdc06c0b
You, Yancheng
09fe5931-deb7-4219-9655-697b3c64f303

Peng, Han, Huang, Yue, Deiterding, Ralf, Luan, Zhenye, Xing, Fei and You, Yancheng (2018) Effects of jet in crossflow on flame acceleration and deflagration to detonation transition in methane-oxygen mixture. Combustion and Flame, 198, 69-80. (doi:10.1016/j.combustflame.2018.08.023).

Record type: Article

Abstract

The fluidal jet turbulator has been a novel perturbation generator in the pulse-detonation engines research field for the past few years. In this paper, an experiment is performed to study the deflagration to detonation transition (DDT) process in a detonation chamber with a reactive transverse methane-oxygen mixture jet in crossflow (JICF). The jet injection arrangement is fundamentally investigated, including single jet and various double jets patterns. Corresponding two-dimensional direct numerical simulations with a multistep chemical kinetics mechanism are employed for analyzing details in the flow field, and the interaction between the vortex and flame temporal evolution is characterized. Both the experiments and simulations demonstrate that the JICF can distinctly accelerate flame propagation and shorten the DDT time and distance. The vortex stream induced by the jet distorts and wrinkles the flame front resulting in local flame acceleration. Moreover, the double jet patterns enhance flame acceleration more than the single jet injection because of the intrinsic counter-rotating vortex pairs and enhanced turbulence intensity.

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Manuscript-revision-0617 - Accepted Manuscript
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More information

Accepted/In Press date: 30 August 2018
e-pub ahead of print date: 20 September 2018
Published date: December 2018
Keywords: flame acceleration, deflagration to detonation transition, jet in crossflow;, flame-vortex interactions, methane flame

Identifiers

Local EPrints ID: 424507
URI: http://eprints.soton.ac.uk/id/eprint/424507
ISSN: 0010-2180
PURE UUID: 7fd7be97-eb63-4f61-8e2d-b9fe1728c145
ORCID for Ralf Deiterding: ORCID iD orcid.org/0000-0003-4776-8183

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Date deposited: 05 Oct 2018 11:38
Last modified: 28 Apr 2022 04:46

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Contributors

Author: Han Peng
Author: Yue Huang
Author: Ralf Deiterding ORCID iD
Author: Zhenye Luan
Author: Fei Xing
Author: Yancheng You

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