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Viscosity and Regression Rate of Liquefying Hybrid Rocket Fuels

Kobald, Mario and Schmierer, C. and Ciezki, H. and Schlechtriem, S. and Toson, E. and De Luca, T. (2017) Viscosity and Regression Rate of Liquefying Hybrid Rocket Fuels. Journal of Propulsion and Power, 33 (5), pp. 1245-1251. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.B36207. ISSN 0748-4658.

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/1.B36207


The combustion behavior of paraffin-based hybrid rocket fuels with gaseous oxygen as an oxidizer has been analyzed in detail. Regression rate tests have been done in a two-dimensional radial microburner at the DLR, German Aerospace Center and at the Space Propulsion Laboratory. Fuel samples have been characterized by viscosity measurements, tensile tests, and a differential scanning calorimeter. Tensile tests showed significant improvement in maximum stress and elongation when polymers in low concentration were added to the paraffin samples. The values of the liquid fuel viscosities differed significantly between the selected fuels. This affected the droplet entrainment process during combustion and the regression rates of the fuels. The entrainment and regression rate increased for the 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/111810/
Document Type:Article
Title:Viscosity and Regression Rate of Liquefying Hybrid Rocket Fuels
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kobald, MarioMario.Kobald (at) dlr.dehttps://orcid.org/0000-0002-1708-3944
Schmierer, C.christian.schmierer (at) dlr.deUNSPECIFIED
Ciezki, H.helmut.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:16 March 2017
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1245-1251
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:Hybrid rocket Propulsion, Paraffin fuel, viscosity, Regression rate
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 - Antriebsystemtechnik - Raketenantriebtests (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Propellants
Deposited By: Kobald, Dr. Mario
Deposited On:05 Apr 2017 11:55
Last Modified:23 Feb 2019 00:21

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