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Investigation of Velocity and Droplet Size Distributions of Flash Boiling LN2-Jets With Phase Doppler Anemometry

Rees, Andreas and Araneo, Lucia and Salzmann, Heiko and Kurudzija, Eldin and Suslov, Dmitry and Lamanna, Grazia and Sender, Joachim and Oschwald, Michael (2019) Investigation of Velocity and Droplet Size Distributions of Flash Boiling LN2-Jets With Phase Doppler Anemometry. In: 29th European Conference Liquid Atomization and Spray Systems ILASS-Europe 2019. ILASS-Europe 2019, 29th Conference on Liquid Atomization and Sprays Systems, 2. - 4. Sept. 2019, Paris, France.

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Official URL: https://ilass19.sciencesconf.org/browse/author?authorid=677422

Abstract

For a detailed experimental investigation of superheated cryogenic fluids the new cryogenic test bench M3.3 with a temperature controlled injection system was built at the DLR Institute of Space Propulsion in Lampoldshausen. After a first test campaign with high-speed shadowgraphy of flash boiling liquid nitrogen sprays a Phase Doppler Anemometry system was set-up to investigate the dependence of droplet velocities and diameters on the injection conditions at different positions in the spray. The local velocity distributions show their maxima close to the injector exit before they decrease to values around zero. The droplet diameters show an evolution from bigger structures with an inhomogeneous distribution close to the injector to a monodisperse spray with increasing axial and radial distances. Two droplet populations with different mean velocities were found at most of the spray positions.

Item URL in elib:https://elib.dlr.de/132832/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of Velocity and Droplet Size Distributions of Flash Boiling LN2-Jets With Phase Doppler Anemometry
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rees, AndreasAndreas.Rees (at) dlr.dehttps://orcid.org/0000-0002-4114-636X
Araneo, LuciaPolitecnico di Milano, Energy Department, Milano, IUNSPECIFIED
Salzmann, HeikoGerman Aerospace Center DLR, Institute of Space Propulsion, DUNSPECIFIED
Kurudzija, EldinGerman Aerospace Center DLR, Institute of Space Propulsion, DUNSPECIFIED
Suslov, DmitryDmitry.Suslov (at) dlr.dehttps://orcid.org/0000-0002-5160-9292
Lamanna, GraziaUniversity of Stuttgart, Institute of Aerospace Thermodynamics, Stuttgart, DUNSPECIFIED
Sender, JoachimJoachim.Sender (at) dlr.dehttps://orcid.org/0000-0002-7408-1208
Oschwald, MichaelMichael.Oschwald (at) dlr.dehttps://orcid.org/0000-0002-9579-9825
Date:2019
Journal or Publication Title:29th European Conference Liquid Atomization and Spray Systems ILASS-Europe 2019
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:flash boiling, cryogenic, atomization, spray, Phase Doppler
Event Title:ILASS-Europe 2019, 29th Conference on Liquid Atomization and Sprays Systems
Event Location:Paris, France
Event Type:international Conference
Event Dates:2. - 4. Sept. 2019
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 - Leitprojekt - Forschungsverbund Oberstufe
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:16 Dec 2019 08:52
Last Modified:16 Dec 2019 08:52

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