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Optical Properties of the Hypergolic Reaction Between Green Ionic Liquids and Highly Concentrated Hydrogen Peroxide

Stützer, Robert and Balkenhohl, Jakob and Lauck, Felix and Oschwald, Michael (2021) Optical Properties of the Hypergolic Reaction Between Green Ionic Liquids and Highly Concentrated Hydrogen Peroxide. 7. Space Propulsion Conference, 17.-19. März 2021, Internet.

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Abstract

The hypergolic reaction between the recently developed green propellant combination consisting of an ionic liquid and highly concentrated hydrogen peroxide was investigated for several ratios of oxidizer and fuel, drop sizes and heights of fall. The influence of the catalytic copper additive on the ignition delay time (IDT) was analysed. Flame emission/absorption spectroscopy revealed the chemical constituents. All spectra were dominated by sodium D-lines at λ= 589nm. Further lines of alkali metals such as lithium and potassium were found. The copper additive showed its characteristic lines accordingly to its amount in the fuel. Emission spectra of the ultraviolet regime showed the characteristic OH* molecular lines around λ= 306nm with its temperature dependent intensity ratios [1][2]. The catalytic additive copper increases the flame temperature while it decreases the IDT from 31 ms for pure ionic liquid to 15 ms (5% mass fraction).

Item URL in elib:https://elib.dlr.de/141636/
Document Type:Conference or Workshop Item (Speech)
Title:Optical Properties of the Hypergolic Reaction Between Green Ionic Liquids and Highly Concentrated Hydrogen Peroxide
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stützer, RobertRobert.Stuetzer (at) dlr.dehttps://orcid.org/0000-0003-4136-8496
Balkenhohl, JakobInstitut für Raumfahrtantriebe, DLR Lampoldshausen, DUNSPECIFIED
Lauck, FelixFelix.Lauck (at) dlr.dehttps://orcid.org/0000-0002-6599-0805
Oschwald, MichaelMichael.Oschwald (at) dlr.dehttps://orcid.org/0000-0002-9579-9825
Date:19 March 2021
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Hypergolic, Ignition, Combustion, Spectroscopy, Ignition Delay Time
Event Title:7. Space Propulsion Conference
Event Location:Internet
Event Type:international Conference
Event Dates:17.-19. März 2021
Organizer:3AF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Systems Engineering Optische Systeme (old), R - Optical Technologies and Applications, Grüne Geltreibstoffe für Raumfahrtrelevante Anwendungen (GGeRA) (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion
Institute of Space Propulsion > Rocket Propulsion
Institute of Space Propulsion > Rocket Propulsion Technology
Institute of Space Propulsion > Propellants
Institute of Space Propulsion > Chemical Propellant Technology
Deposited By: Stützer, Dr. Robert
Deposited On:31 Mar 2021 08:12
Last Modified:31 Mar 2021 08:12

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