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Analyses of Cryogenic Propellant Tank Pressurization based upon Ground Experiments

Ludwig, Carina and Dreyer, Michael (2012) Analyses of Cryogenic Propellant Tank Pressurization based upon Ground Experiments. American Institute of Aeronautics and Astronautics. AIAA SPACE 2012 Conference & Exposition, 2012-09-11 - 2012-09-13, Pasadena, California, USA. doi: 10.2514/6.2012-5199. ISBN 978-1-60086-940-2.

PDF (AIAA 2012-5199)

Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2012-5199


The pressurization system of cryogenic propellant rockets requires on-board pressurant gas. The objective of this study was to analyze the influence of the pressurant gas temperature on the required pressurant gas mass in terms of lowering the launcher mass. First, ground experiments were performed in order to investigate the pressurization process with regard to the influence of the pressurant gas inlet temperature. Second, a system study for the cryogenic upper stage of a small Two Stage to Orbit (TSTO) launch vehicle was performed with focus on the influence of the pressurant gas temperature on the propellant management system mass. One important experimental result is that for evaporated propellant as pressurant gas, the maximum applicable gas temperature is best for reducing the needed pressurant gas, but on condition that all pressurization lines are chilled down. Moreover, the use of helium is very advantageous with regard to lowering the pressurant gas mass. Also significant is that an immediate pressure drop occurred after the pressurization end. The conclusion drawn from the system analysis is that an increased evaporated propellant and helium pressurant gas temperature resulted in a decrease of the total propellant management system mass, despite the application of external helium vessels.

Item URL in elib:https://elib.dlr.de/78204/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:Analyses of Cryogenic Propellant Tank Pressurization based upon Ground Experiments
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Dreyer, MichaelZARM, University of BremenUNSPECIFIEDUNSPECIFIED
Date:11 September 2012
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Publisher:American Institute of Aeronautics and Astronautics
Keywords:Cryogenic, Propellant, tank, Pressurization, TSTO, Two-Stage To Orbit, Fluid Mass,
Event Title:AIAA SPACE 2012 Conference & Exposition
Event Location:Pasadena, California, USA
Event Type:international Conference
Event Start Date:11 September 2012
Event End Date:13 September 2012
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 - Raumfahrzeugsysteme - Systemanalyse Raumtransport (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Space Launcher Systems Analysis
Deposited By: Vormschlag, Nele Marei
Deposited On:22 Jan 2013 11:44
Last Modified:24 Apr 2024 19:44

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