Datum
2017-12-21Autor
Klinner, JoachimSchlagwort
620 Ingenieurwissenschaften Transsonische StrömungTomografieParticle-Image-VelocimetryLumineszenzdiode47.80.Cb47.80.Jk4755.Ca47.40.Hg42.30.WbMetadata
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Dissertation
Development and assessment of volume resolving velocimetry for turbomachinery test facilities
Zusammenfassung
The present thesis assesses the applicability of volume resolving velocimetry
for turbo machinery test facilities. Tomographic particle image velocimetry has been implemented in a transonic cascade wind tunnel. Assessment is based on 3D-3C measurements of the passage vortex in an axial compressor cascade at subsonic inflow (Ma1=0.6). Results show broad consistency with stereoscopic PIV with improved depth resolution. A novel Fast Multiplicative Algebraic Reconstruction Technique (FMART) enables signi cantly faster computations of particle reconstructions in comparison to a state-of-the-art procedure (simultaneous MART) while maintaining similar accuracies.
The second part describes the development of tomographic shadowgraphy for 3-D measurements of spatial fuel spray distributions and droplet velocities. This novel approach is based on simultaneous imaging from different directions with pulsed LED inline illumination. Assessment is based on 3D-3C measurements of the airblast atomization of a single kerosene jet in a swirl flow at air pressures between 4-7 bar and air temperatures between 440-570 K inside a spray test facility. The minimum resolvable droplet diameter is 10 µm under the given experimental conditions. Validation against PDA data revealed consistency at size classes d = 10µm and 15µm.
for turbo machinery test facilities. Tomographic particle image velocimetry has been implemented in a transonic cascade wind tunnel. Assessment is based on 3D-3C measurements of the passage vortex in an axial compressor cascade at subsonic inflow (Ma1=0.6). Results show broad consistency with stereoscopic PIV with improved depth resolution. A novel Fast Multiplicative Algebraic Reconstruction Technique (FMART) enables signi cantly faster computations of particle reconstructions in comparison to a state-of-the-art procedure (simultaneous MART) while maintaining similar accuracies.
The second part describes the development of tomographic shadowgraphy for 3-D measurements of spatial fuel spray distributions and droplet velocities. This novel approach is based on simultaneous imaging from different directions with pulsed LED inline illumination. Assessment is based on 3D-3C measurements of the airblast atomization of a single kerosene jet in a swirl flow at air pressures between 4-7 bar and air temperatures between 440-570 K inside a spray test facility. The minimum resolvable droplet diameter is 10 µm under the given experimental conditions. Validation against PDA data revealed consistency at size classes d = 10µm and 15µm.
Zitierform
Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt DLR FBFörderhinweis
Part of the work presented is supported by the EU-project AFDAR (Advanced Flow Diagnostics for Aeronautical Research, project no. 265695) of the 7th Framework programme whose support is gratefully acknowledged.Zitieren
@phdthesis{urn:nbn:de:hebis:34-2018010954161,
author={Klinner, Joachim},
title={Development and assessment of volume resolving velocimetry for turbomachinery test facilities},
school={Kassel, Universität Kassel, Fachbereich Elektrotechnik / Informatik},
month={12},
year={2017}
}
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2018-01-09T11:14:35Z 2018-01-09T11:14:35Z 2017-12-21 1434-8454 urn:nbn:de:hebis:34-2018010954161 http://hdl.handle.net/123456789/2018010954161 Part of the work presented is supported by the EU-project AFDAR (Advanced Flow Diagnostics for Aeronautical Research, project no. 265695) of the 7th Framework programme whose support is gratefully acknowledged. eng Deutsches Zentrum für Luft- und Raumfahrt DLR Urheberrechtlich geschützt https://rightsstatements.org/page/InC/1.0/ transonic flow tomographic reconstruction PIV pulsed LED shadowgraphy sprays airblast atomization swirled flow 620 Development and assessment of volume resolving velocimetry for turbomachinery test facilities Dissertation The present thesis assesses the applicability of volume resolving velocimetry for turbo machinery test facilities. Tomographic particle image velocimetry has been implemented in a transonic cascade wind tunnel. Assessment is based on 3D-3C measurements of the passage vortex in an axial compressor cascade at subsonic inflow (Ma1=0.6). Results show broad consistency with stereoscopic PIV with improved depth resolution. A novel Fast Multiplicative Algebraic Reconstruction Technique (FMART) enables signi cantly faster computations of particle reconstructions in comparison to a state-of-the-art procedure (simultaneous MART) while maintaining similar accuracies. The second part describes the development of tomographic shadowgraphy for 3-D measurements of spatial fuel spray distributions and droplet velocities. This novel approach is based on simultaneous imaging from different directions with pulsed LED inline illumination. Assessment is based on 3D-3C measurements of the airblast atomization of a single kerosene jet in a swirl flow at air pressures between 4-7 bar and air temperatures between 440-570 K inside a spray test facility. The minimum resolvable droplet diameter is 10 µm under the given experimental conditions. Validation against PDA data revealed consistency at size classes d = 10µm and 15µm. open access Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt DLR FB Klinner, Joachim DLR Forschungsbericht ;; 2017-52 Kassel, Universität Kassel, Fachbereich Elektrotechnik / Informatik Hillmer, Hartmut (Prof. Dr.) Lawerenz, Martin (Univ.-Prof. Dr.-Ing.) Witzigmann, Bernd (Prof. Dr.) Lehmann, Peter (Prof. Dr.-Ing.) 47.80.Cb 47.80.Jk 4755.Ca 47.40.Hg 42.30.Wb Transsonische Strömung Tomografie Particle-Image-Velocimetry Lumineszenzdiode DLR Forschungsbericht 2017-52 2017-10-16
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