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TP-B4: Experimentelle Untersuchung von transienten Einspritzphänomenen in Raketenbrennkammern unter Vakuumbedingungen mit Flashverdampfung

Oschwald, Michael and Rees, Andreas and Sender, Joachim (2020) TP-B4: Experimentelle Untersuchung von transienten Einspritzphänomenen in Raketenbrennkammern unter Vakuumbedingungen mit Flashverdampfung. [Other]

Full text not available from this repository.

Abstract

TP-B4 focuses on the experimental investigation of superheated liquid nitrogen (LN2) injected into a near vacuum atmosphere, which causes the so-called flash evaporation. Hence, the new test bench M3.3 with a specific cryogenic injection system was developed for a systematical and detailed characterisation of cryogenic flash evaporation as a function of the injection conditions and geometries. After first run-in tests to validate the test bench performance and its data acquisition system three test campaigns with LN2 were performed: campaign #1 with high-speed shadowgraphy to visualize the resulting LN2 sprays and their spray patterns, campaign #2 with a Phase Doppler Anemometry (PDA) system in the Dual-Mode configuration to determine droplet size and velocity distributions in fully flashing LN2 sprays and campaign #3 with the PDA system in an optimized 2D-Fiber configuration with modified optical accesses to the vacuum chamber. The generated experimental data of flash boiling LN2 provide a comprehensive data base for the validation of numerical models and further numerical investigations and are used within TP-B5 for model validation.

Item URL in elib:https://elib.dlr.de/138003/
Document Type:Other
Title:TP-B4: Experimentelle Untersuchung von transienten Einspritzphänomenen in Raketenbrennkammern unter Vakuumbedingungen mit Flashverdampfung
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Oschwald, MichaelMichael.Oschwald (at) dlr.dehttps://orcid.org/0000-0002-9579-9825
Rees, AndreasAndreas.Rees (at) dlr.dehttps://orcid.org/0000-0002-4114-636X
Sender, JoachimJoachim.Sender (at) dlr.dehttps://orcid.org/0000-0002-7408-1208
Date:2020
Journal or Publication Title:SFB TRR 75 Jahresbericht
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:flash boiling, liquid nitrogen, droplet size, velocity distribution, shock wave
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 - Schubkammertechnologie (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:25 Nov 2020 11:52
Last Modified:25 Nov 2020 11:52

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