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 signicantly 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.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Development and assessment of volume resolving velocimetry for turbomachinery test facilities


    Beteiligte:

    Erscheinungsdatum :

    2017-12-21


    Medientyp :

    Sonstige


    Format :

    Elektronische Ressource


    Sprache :

    Englisch







    Validation of Turbomachinery Computational Fluid Dynamic Models Using Laser Velocimetry

    Ferguson, T. V. / McGlynn, R. D. / Aerospace Corporation | British Library Conference Proceedings | 1999


    Selected applications of planar imaging velocimetry in combustion test facilities

    Willert, Christian / Voges, Melanie / Stockhausen, Guido et al. | Deutsches Zentrum für Luft- und Raumfahrt (DLR) | 2006

    Freier Zugriff