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Parameters Influencing the Characteristic Exhaust Velocity of a Nitrous Oxide/Ethene Green Propellant

Werling, Lukas and Bätz, Patrick (2022) Parameters Influencing the Characteristic Exhaust Velocity of a Nitrous Oxide/Ethene Green Propellant. Journal of Propulsion and Power. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.B38349. ISSN 0748-4658.

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Official URL: https://arc.aiaa.org/doi/10.2514/1.B38349

Abstract

Currently, several green propellants are under investigation to replace the toxic and carcinogenic monopropellant hydrazine (N2H4). Beside alternatives as ammonium dinitramide-based propellants, hydroxylammonium nitrate-based mixtures, or high concentrated hydrogen peroxide, mixtures of fuels with nitrous oxide (N2O) called HyNOx or NOFBX represent promising green propellants. Compared to classical N2H4, N2O/fuel mixtures offer a higher performance (Isp and c∗), no or low toxicity, and low propellant costs. To investigate the handling and performance of a propellant mixture consisting of N2O and ethene, hot gas combustion tests with an experimental combustor were conducted. This paper summarizes the results of 134 combustion tests conducted with the premixed propellant injected in gaseous state. Calculated and measured performances (c∗ and ηc∗) depending on mixture ratio, characteristic combustion chamber length L∗, and chamber pressure are shown and discussed. Furthermore, the residence timescales of the propellant mixture inside the combustion chamber are normalized by the chemical timescale of the combustion process. Thus, combustion efficiencies depending on dimensionless Damköhler numbers are derived.

Item URL in elib:https://elib.dlr.de/148424/
Document Type:Article
Title:Parameters Influencing the Characteristic Exhaust Velocity of a Nitrous Oxide/Ethene Green Propellant
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Werling, LukasLukas.Werling (at) dlr.dehttps://orcid.org/0000-0003-4353-2931
Bätz, PatrickPatrick.Baetz (at) dlr.deUNSPECIFIED
Date:2022
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.2514/1.B38349
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0748-4658
Status:Published
Keywords:Monopropellants, Combustion Chambers, Rocket Propellant, Green Propellants, N2O, C2H4, c*, Efficiency Rocket engine
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Project Future Fuels - Advanced Rocket Propellants
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Spacecraft and Orbital Propulsion
Deposited By: Werling, Lukas
Deposited On:20 Jan 2022 07:35
Last Modified:31 Jan 2022 08:14

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