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Implementation of tomographic shadowgraphy in a generic aero engine burner at elevated pressure and temperature

Klinner, Joachim and Freitag, Stefan and Hassa, Christoph and Willert, Christian (2017) Implementation of tomographic shadowgraphy in a generic aero engine burner at elevated pressure and temperature. Measurement and Observation Techniques for Aerospace Research (MOTAR), 26. - 27. April 2017, Berlin.

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Abstract

The contribution describes the implementation of tomographic shadowgraphy for 3-D measurements of spatial fuel spray distributions and droplet velocities of a generic aero-engine burner model inside a pressurized spray test stand. The technique relies on simultaneously acquired shadow images of a spray field obtained from different views using inline illumination with pulsed LED light. The air-blast atomization of a single kerosene jet in a swirl flow is investigated at Weber numbers between 360-770, air pressures between 4-7 bar and air temperatures between 440-570K. For the given setup and a measurement domain of 16x13x10mm³, the minimum resolvable droplet diameter is estimated with 10µm. Velocities of droplets above that resolution limit were retrieved by 3-D cross-correlation of two spray volumes recorded at consecutive time-steps. Extracted slices of the instantaneous axial velocity indicate strong undulation of the spray tail with increasing temperature and Weber number. Validation against PDA data revealed consistency at size classes d=10µm and 15µm.

Item URL in elib:https://elib.dlr.de/117094/
Document Type:Conference or Workshop Item (Speech)
Additional Information:MOTAR Proceedings unter: https://teamsitesextranet. dlr.de/vt/MOTAR/SitePages/Home.aspx
Title:Implementation of tomographic shadowgraphy in a generic aero engine burner at elevated pressure and temperature
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klinner, JoachimJoachim.Klinner (at) dlr.dehttps://orcid.org/0000-0003-2709-9664
Freitag, StefanStefan.Freitag (at) dlr.deUNSPECIFIED
Hassa, ChristophChristoph.Hassa (at) dlr.deUNSPECIFIED
Willert, ChristianChris.Willert (at) dlr.dehttps://orcid.org/0000-0002-1668-0181
Date:27 April 2017
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:pulsed LED, shadowgraphy, sprays, airblast atomization, swirled flow, tomographic reconstruction
Event Title:Measurement and Observation Techniques for Aerospace Research (MOTAR)
Event Location:Berlin
Event Type:international Conference
Event Dates:26. - 27. April 2017
Organizer:DLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Combustion Chamber Technologies, L - Virtual Engine and Validation methods
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology
Deposited By: Klinner, Joachim
Deposited On:14 Dec 2017 16:03
Last Modified:14 Dec 2017 16:03

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