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Experimental analysis of the heat fluxes during combustion of a N2O/C2H4 premixed green propellant in a research rocket combustor

Werling, Lukas and Hörger, Till (2021) Experimental analysis of the heat fluxes during combustion of a N2O/C2H4 premixed green propellant in a research rocket combustor. Acta Astronautica (189), pp. 473-451. Elsevier. doi: 10.1016/j.actaastro.2021.07.011. ISSN 0094-5765.

Full text not available from this repository.

Official URL: https://www.sciencedirect.com/science/article/abs/pii/S0094576521003696

Abstract

Across the globe, several green propellants as substitute for the highly toxic hydrazine are under investigation. A possible alternative are so called nitrous oxide fuel blends. This paper presents the results of combustion tests conducted with a premixed monopropellant consisting of N2O and C2H4. In four test series the influence of the mixture ratio, the chamber pressure, the chamber length and the average flow velocity on the combustion efficiency and on the heat flux is analyzed and discussed. Furthermore four empirical Nusselt correlations derived by Bartz, Cinjarew, Dittus–Boelter and Gnielinski are compared to the experimental results and finally modified to improve their accuracy. In an additional test campaign the oxidizer N2O was used as regenerative coolant prior to the mixing with C2H4. However, mixing of the hot N2O with C2H4 resulted in the decomposition of C2H4 and the formation of soot. For this reason in a final test campaign a premixed N2O/C2H6 propellant was used. The N2O/C2H6 mixture was successfully used as regenerative coolant and combustion tests up to 10 min were performed.

Item URL in elib:https://elib.dlr.de/148423/
Document Type:Article
Title:Experimental analysis of the heat fluxes during combustion of a N2O/C2H4 premixed green propellant in a research rocket combustor
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Werling, LukasLukas.Werling (at) dlr.dehttps://orcid.org/0000-0003-4353-2931
Hörger, TillTill.Hoerger (at) dlr.dehttps://orcid.org/0000-0001-5859-9907
Date:December 2021
Journal or Publication Title:Acta Astronautica
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.actaastro.2021.07.011
Page Range:pp. 473-451
Publisher:Elsevier
ISSN:0094-5765
Status:Published
Keywords:Green propellants, Premixed propellants, Nitrous oxide fuel blends Heat flux, Rocket engines heat loads, Nusselt-correlations, HyNOx c*-efficiency, N2O, C2H4, C2H6
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:24 May 2022 23:48

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