An experimental study of detonation initiation in supersonic flow using a hot jet
An experimental study of detonation initiation in supersonic flow using a hot jet
In this study, detonation initiation in supersonic premixed flow is experimentally investigated using hot jets with different strength. Two types of shock interaction models, B/S (bow/separated) and S/S (separated/separated), are observed, respectively. In the case with the high-strength hot jet, the ignition of the combustible mixture is triggered by the interaction between jet-induced bow and bottom separated shocks, which results in the generation of a Mach stem further initiating the detonation. Finally, the structure of SSIC (separated shock-induced combustion)/LD (local detonation)/SSIC (separated shock-induced combustion) is observed. For the low-strength hot jet, detonation initiation could not be realized by the interaction between bow and separated shocks, and only the separated shock-induced combustion is observed. The interaction of shock surfaces in the flow field is dominated by the upper separated shock. Finally, a "<" shaped SSIC/SSIC structure is generated associated with the forward propagation of separated shocks in the supersonic flow.
Detonation initiation, Hot jet, Shock interaction mode, Supersonic flow
Cai, Xiaodong
293bf621-f0e1-48ba-abaa-b41da81ea244
Chen, Weiqiang
eb262872-057b-48fe-98f9-dac7cb71fd74
Jin, Kaiyan
30141171-4df3-40b9-a151-5e5283e33894
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Liang, Jianhan
8055c6a2-9bbd-4cb5-81d3-d5cc33911ed5
1 March 2023
Cai, Xiaodong
293bf621-f0e1-48ba-abaa-b41da81ea244
Chen, Weiqiang
eb262872-057b-48fe-98f9-dac7cb71fd74
Jin, Kaiyan
30141171-4df3-40b9-a151-5e5283e33894
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Liang, Jianhan
8055c6a2-9bbd-4cb5-81d3-d5cc33911ed5
Cai, Xiaodong, Chen, Weiqiang, Jin, Kaiyan, Deiterding, Ralf and Liang, Jianhan
(2023)
An experimental study of detonation initiation in supersonic flow using a hot jet.
Combustion and Flame, 249, [112613].
(doi:10.1016/j.combustflame.2022.112613).
Abstract
In this study, detonation initiation in supersonic premixed flow is experimentally investigated using hot jets with different strength. Two types of shock interaction models, B/S (bow/separated) and S/S (separated/separated), are observed, respectively. In the case with the high-strength hot jet, the ignition of the combustible mixture is triggered by the interaction between jet-induced bow and bottom separated shocks, which results in the generation of a Mach stem further initiating the detonation. Finally, the structure of SSIC (separated shock-induced combustion)/LD (local detonation)/SSIC (separated shock-induced combustion) is observed. For the low-strength hot jet, detonation initiation could not be realized by the interaction between bow and separated shocks, and only the separated shock-induced combustion is observed. The interaction of shock surfaces in the flow field is dominated by the upper separated shock. Finally, a "<" shaped SSIC/SSIC structure is generated associated with the forward propagation of separated shocks in the supersonic flow.
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CNF-Manuscript20220822-V1
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Accepted/In Press date: 30 December 2022
e-pub ahead of print date: 9 January 2023
Published date: 1 March 2023
Additional Information:
Funding Information:
This work is supported by the National Natural Science Foundation of China (No. 11702323 ).
Keywords:
Detonation initiation, Hot jet, Shock interaction mode, Supersonic flow
Identifiers
Local EPrints ID: 474117
URI: http://eprints.soton.ac.uk/id/eprint/474117
ISSN: 0010-2180
PURE UUID: 36ada5f6-c490-4af0-9160-0c3e6e36524e
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Date deposited: 14 Feb 2023 17:30
Last modified: 17 Mar 2024 03:39
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Contributors
Author:
Xiaodong Cai
Author:
Weiqiang Chen
Author:
Kaiyan Jin
Author:
Jianhan Liang
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