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Effects of a hot jet on detonation initiation and propagation in supersonic combustible mixtures

Liang, Jianghan and Cai, Xiaodong and Lin, Zhiyong and Deiterding, Ralf (2014) Effects of a hot jet on detonation initiation and propagation in supersonic combustible mixtures. Acta Astronautica, 105 (1), pp. 265-277. Elsevier. DOI: 10.1016/j.actaastro.2014.08.019 ISSN 0094-5765

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Official URL: http://dx.doi.org/10.1016/j.actaastro.2014.08.019

Abstract

The effects of a hot jet on detonation initiation and propagation in supersonic combustible mixtures has been studied with two-dimensional numerical simulations with the open-source program AMROC that uses a block-structured adaptive mesh refinement method. Results indicate that the hot jet could ignite the detonation effectively in supersonic combustible mixtures like a pneumatic ramp. After the realization of the detonation initiation, the hot jet can still play an important role on the detonation propagation during its continuous ejection. For a hot jet with certain diameter, it can result in an overdriven detonation with almost constant overdrive degree. After the shutdown of the hot jet, the stable CJ detonation combustion was realized finally in the supersonic combustible mixtures. With the re-ejection of the hot jet, the failed detonation could be reinitiated quickly. Through the control of the re-ejection of the hot jet, it plays a key role not only in the initiation process, but also in the subsequent continuous detonation combustion period.

Item URL in elib:https://elib.dlr.de/95320/
Document Type:Article
Additional Information:Published online: 03. Sept. 2014
Title:Effects of a hot jet on detonation initiation and propagation in supersonic combustible mixtures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Liang, JianghanScience andTechnologyonScramjetLaboratory,NationalUniversityofDefenseTechnology,410073Changsha,Hunan,ChinaUNSPECIFIED
Cai, XiaodongScience andTechnologyonScramjetLaboratory,NationalUniversityofDefenseTechnology,410073Changsha,Hunan,ChinaUNSPECIFIED
Lin, ZhiyongScience andTechnologyonScramjetLaboratory,NationalUniversityofDefenseTechnology,410073Changsha,Hunan,ChinaUNSPECIFIED
Deiterding, Ralfralf.deiterding (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Acta Astronautica
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:105
DOI :10.1016/j.actaastro.2014.08.019
Page Range:pp. 265-277
Publisher:Elsevier
Series Name:ScienceDirect
ISSN:0094-5765
Status:Published
Keywords:adaptive mesh refinement, simulation, detonation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Micknaus, Ilka
Deposited On:25 Feb 2015 15:25
Last Modified:10 Jan 2019 15:39

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