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Adaptive mesh refinement based numerical simulation of detonation initiation in supersonic combustible mixtures using a hot jet

Xiaodong, Cai and Jianhan, Liang and Zhiyong, Lin and Deiterding, Ralf and Hui, Qin and Xu, Han (2015) Adaptive mesh refinement based numerical simulation of detonation initiation in supersonic combustible mixtures using a hot jet. Journal of Aerospace Engineering, 28 (1), pp. 1-36. American Society of Civil Engineers. DOI: 10.1061/(ASCE)AS.1943-5525.0000376 ISSN 0893-1321

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Official URL: http://dx.doi.org/10.1061/(ASCE)AS.1943-5525.0000376

Abstract

The open-source program AMROC, implementing a block-structured adaptive mesh refinement method, was adopted for the fine structure numerical simulation of detonation initiation in supersonic combustible mixtures. Simulations were conducted on a nested parallel LINUX compute system. The initiation process was specified as three stages and their respective flow field characteristics were analyzed. Results indicate that a hot jet under specific conditions can have a similar effect as a pneumatic oblique bevel for inducing periodical shock-induced detonative combustion by a bow shock. The interaction of bow-shock-induced combustion with the local detonation wave, produced by the reflection shock on the upper wall, can create a structure with two triple-wave points. The hot jet not only plays a role in the detonation initiation, but also is found to act as a stabilizing control mechanism for detonation propagation. In our simulations, the detonation wave propagates in an overdriven state initially and achieves self-sustaining motion after the shutdown of the hot jet. Subsequently, the final pisiform structure of typical stable Chapman-Jouguet detonation cells is formed.

Item URL in elib:https://elib.dlr.de/84669/
Document Type:Article
Additional Information:Published online: 02 August 2013, ISSN (online): 1943-5525, Paper: 04014046
Title:Adaptive mesh refinement based numerical simulation of detonation initiation in supersonic combustible mixtures using a hot jet
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Xiaodong, CaiScience and Technology on Scramjet Laboratory, National University of Defense Technology, Hunan Changsha, 410073, ChinaUNSPECIFIED
Jianhan, LiangScience and Technology on Scramjet Laboratory, National University of Defense Technology, Hunan Changsha, 410073, ChinaUNSPECIFIED
Zhiyong, LinScience and Technology on Scramjet Laboratory, National University of Defense Technology, Hunan Changsha, 410073, ChinaUNSPECIFIED
Deiterding, Ralfralf.deiterding (at) dlr.deUNSPECIFIED
Hui, QinScience and Technology on Scramjet Laboratory, National University of Defense Technology, Hunan Changsha, 410073, ChinaUNSPECIFIED
Xu, HanScience and Technology on Scramjet Laboratory, National University of Defense Technology, Hunan Changsha, 410073, ChinaUNSPECIFIED
Date:2015
Journal or Publication Title:Journal of Aerospace Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:28
DOI :10.1061/(ASCE)AS.1943-5525.0000376
Page Range:pp. 1-36
Publisher:American Society of Civil Engineers
ISSN:0893-1321
Status:Published
Keywords:Detonationen, Simulation, Scramjet, adaptive Gitterverfeinerung, adaptive mesh refinement
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:11 Feb 2015 16:55
Last Modified:11 Feb 2015 16:55

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