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Evaluation of Paraffin-based Fuels for Hybrid Rocket Engines

Kobald, Mario and Schmierer, C. and Ciezki, Helmut and Schlechtriem, S. and Toson, E. and De Luca, T. (2014) Evaluation of Paraffin-based Fuels for Hybrid Rocket Engines. In: 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference. 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 28.-30. Jul. 2014, Cleveland, USA.

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Abstract

This paper summarizes the investigations on the combustion behavior of paraffin-based hybrid rocket fuels with gaseous oxygen (GOX) as oxidizer. Combined experimental activities have been done at the DLR Institute of Space Propulsion in Lampoldshausen and at the Space Propulsion Laboratory (SPLab) of Politecnico di Milano. Regression rate tests have been done in a 2D radial micro burner at the DLR and at the SPLab. Fuel samples have been characterized by viscosity measurements, tensile tests and differential scanning calorimeter (DSC). Tensile tests shows significant improvement in maximum stress and elongation when polymers in low concentration are added to the paraffin samples. The values of the liquid fuel viscosities differ signifcantly between the fuels. This affects the droplet entrainment process during combustion and also the regression rates of the fuels. Entrainment and regression rate increase for decreasing fuel liquid layer viscosity. An exponential relation has been found between the liquid fuel layer viscosity and the Regression rate, which can be used to predict the regression rate of new liquefying fuels by measuring their viscosity.

Item URL in elib:https://elib.dlr.de/90299/
Document Type:Conference or Workshop Item (Speech)
Title:Evaluation of Paraffin-based Fuels for Hybrid Rocket Engines
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kobald, Mariomario.kobald (at) dlr.dehttps://orcid.org/0000-0002-1708-3944
Schmierer, C.christian.schmierer (at) dlr.deUNSPECIFIED
Ciezki, HelmutHelmut.Ciezki (at) dlr.deUNSPECIFIED
Schlechtriem, S.Stefan.Schlechtriem (at) dlr.deUNSPECIFIED
Toson, E.Space Prop. Lab.; Politecnico di Milano, ItalyUNSPECIFIED
De Luca, T.Space Prop. Lab.; Politecnico di Milano, ItalyUNSPECIFIED
Date:29 July 2014
Journal or Publication Title:50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Hybrid rocket propulsion, paraffin fuel, viscosity, tensile tests, regression rate correlation
Event Title:50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Event Location:Cleveland, USA
Event Type:international Conference
Event Dates:28.-30. Jul. 2014
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
Deposited By: Kobald, Dr. Mario
Deposited On:18 Aug 2014 08:54
Last Modified:01 Dec 2018 19:50

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