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Principal and Independent Component Analysis of Hybrid Combustion Flame

Petrarolo, Anna and Kobald, Mario and Ciezki, Helmut and Schlechtriem, Stefan (2019) Principal and Independent Component Analysis of Hybrid Combustion Flame. International Journal of Energetic Materials and Chemical Propulsion, 18 (1), pp. 9-29. Begell House. DOI: 10.1615/IntJEnergeticMaterialsChemProp.2019028035 ISSN 2150-766X

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Official URL: http://www.dl.begellhouse.com/journals/17bbb47e377ce023,17aafee356cc25d3,4732571579f83ce6.html

Abstract

Hybrid rocket engines are a promising technology for a variety of applications, due to their advantages with respect to solid and liquid propulsion systems. However, their use has been hindered in the past due to the low regression rate performance associated with classical polymeric hybrid fuels. The discovery of high regression rate hybrid fuels has renewed the interest in hybrid rocket propulsion. The increase in regression rate is caused by a different combustion mechanism, which still needs to be fully understood. Since 2013, many optical investigations on the so-called liquefying hybrid fuels have been done at the German Aerospace Center, Institute of Space Propulsion in Lampoldshausen, Germany, in order to better understand the mechanism responsible for droplet entrainment. The liquid layer combustion process of paraffin-based fuels in combination with gaseous oxygen has been visualized with different optical techniques in a two-dimensional single slab burner. Tests have been performed under both sub- and supercritical pressure conditions. The fuel slab configuration and composition and oxidizer mass flow rate have also been varied to understand their influence on the phenomenon. The latest results of this research are presented and discussed in this work. In all of the tests, the flame is characterized by a wave-like structure, whose frequencies and wavelengths are determined by using decomposition algorithms. Droplet formation is observed mainly during the transients. At elevated operating pressures, the flame becomes unsteady and highly turbulent. Many flame bursting and blowing events are also visualized.

Item URL in elib:https://elib.dlr.de/130741/
Document Type:Article
Title:Principal and Independent Component Analysis of Hybrid Combustion Flame
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Petrarolo, AnnaAnna.Petrarolo (at) dlr.dehttps://orcid.org/0000-0002-2291-2874
Kobald, MarioMario.Kobald (at) dlr.dehttps://orcid.org/0000-0002-1708-3944
Ciezki, HelmutHelmut.Ciezki (at) dlr.dehttps://orcid.org/0000-0002-1539-4677
Schlechtriem, StefanStefan.Schlechtriem (at) dlr.dehttps://orcid.org/0000-0002-3714-9664
Date:2019
Journal or Publication Title:International Journal of Energetic Materials and Chemical Propulsion
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:18
DOI :10.1615/IntJEnergeticMaterialsChemProp.2019028035
Page Range:pp. 9-29
Publisher:Begell House
ISSN:2150-766X
Status:Published
Keywords:hybrid rocket propulsion, entrainment, liquefying fuels, paraffin, optical investigations, decomposition methods, proper orthogonal decomposition (POD), independent component analysis (ICA), Kelvin–Helmholtz instability
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):Project ATEK
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Propellants
Deposited By: Hanke, Michaela
Deposited On:26 Nov 2019 08:16
Last Modified:14 Dec 2019 04:23

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