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Investigation of the Kelvin-Helmholtz Instability Process in Liquefying Hybrid Rocket Fuels

Petrarolo, Anna and Kobald, Mario and Schlechtriem, S. (2018) Investigation of the Kelvin-Helmholtz Instability Process in Liquefying Hybrid Rocket Fuels. Space Propulsion Conference 2018, 13.-18. Mai. 2018, Sevilla, Spanien.

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Abstract

The combustion behavior of paraffin-based hybrid rocket fuels has been investigated with different optical techniques in the framework of this research. Combustion tests were conducted in a 2D single-slab burner at atmospheric conditions. High speed videos and CH* chemiluminescence imaging were performed and analysed in detail by using an automated video evaluation routine. Two different decomposition techniques (Proper Orthogonal Decomposition and Independent Component Analysis) were applied to the scalar field of the flame luminosity and the flame characteristics of these fast burning fuels were computed. The fuel viscosity and oxidizer mass flow have been varied in order to study the influence of these parameters on the liquid layer instability process. Wave-like structures can be seen throughout the whole combustion process in all the performed tests. The flame topology and location within the boundary layer is found to depend on the choice of the fuel and oxidizer mass flow.

Item URL in elib:https://elib.dlr.de/120052/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of the Kelvin-Helmholtz Instability Process in Liquefying Hybrid Rocket Fuels
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
Schlechtriem, S.Stefan.Schlechtriem (at) dlr.deUNSPECIFIED
Date:2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Hybrid rocket propulsion, Paraffin fuel, Optical Investigation, Proper Orthogonal Decomposition, Independent Component Analysis, Kelvin-Helmholtz instability
Event Title:Space Propulsion Conference 2018
Event Location:Sevilla, Spanien
Event Type:international Conference
Event Dates:13.-18. Mai. 2018
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):R - Antriebsystemtechnik - Raketenantriebtests
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Propellants
Deposited By: Kobald, Dr. Mario
Deposited On:22 May 2018 10:29
Last Modified:31 Jul 2019 20:17

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