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Liquid Nitrogen Experiments and Simulations using a large-scale Aluminum Test Tank

Konopka, Martin and Stark, Anton and Gerstmann, Jens (2021) Liquid Nitrogen Experiments and Simulations using a large-scale Aluminum Test Tank. In: AIAA Propulsion and Energy Forum, 2021. AIAA Propulsion and Energy 2021 Forum, 2021-08-09 - 2021-08-11, Virtual Event. doi: 10.2514/6.2021-3560. ISBN 978-162410611-8.

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A new 800 l aluminum test tank built by ArianeGroup for liquid nitrogen and liquid hydrogen experiments was established at the Cryo-Lab at DLR, Bremen. The purpose is to have a liquid hydrogen test tank of future upper stages to conduct cryogenic propellant management experiments. First liquid nitrogen filling, boil-off, and stratification experiments were performed to assess the thermal performance of the tank and investigate the liquid nitrogen behavior in the aluminum test tank. The current boil-off experiment with liquid nitrogen showed a heat flow of about 220 W into the tank. The stratification experiments were conducted at a system pressure of 0.4 MPa and evidenced that the top of the tank was only 23 K warmer than the liquid body, re-creating the unique thermal stratification conditions inside a cryogenic aluminum tank used for upper stages. Detailed transient temperature measurements of the liquid, vapor and tank wall temperature were performed. The stratification experiments were simulated using an in-house 1D tank flow solver. The computations show a good agreement with the temperature measurements with a maximum deviation of 1.8 %. Furthermore, stratification experiments with heating blankets with a power of 240 W were conducted which showed S-shaped temperature profiles consistend with turbulent natural thermal startification.

Item URL in elib:https://elib.dlr.de/143500/
Document Type:Conference or Workshop Item (Speech)
Title:Liquid Nitrogen Experiments and Simulations using a large-scale Aluminum Test Tank
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:28 July 2021
Journal or Publication Title:AIAA Propulsion and Energy Forum, 2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Cryogenics, Tank demonstrator, stratification, boil-off
Event Title:AIAA Propulsion and Energy 2021 Forum
Event Location:Virtual Event
Event Type:international Conference
Event Start Date:9 August 2021
Event End Date:11 August 2021
Organizer:American Institute of Aeronautics and Astronautics
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 - Lead Project - Upper Level Research Network
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Transport and Propulsion System
Deposited By: Gerstmann, Dr.-Ing. Jens
Deposited On:09 Sep 2021 09:41
Last Modified:24 Apr 2024 20:43

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