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Experimental Study of Impingement Effusion Cooled Double-Wall Combustor Liners: Aerodynamic Analysis with Stereo-PIV

Author

Listed:
  • Thomas Jackowski

    (Institute of Thermal Turbomachinery (ITS), Karlsruhe Institute of Technology (KIT), 76137 Karlsruhe, Germany
    Retired from Karlsruhe Institute of Technology (KIT).
    These authors contributed equally to this work.)

  • Maximilian Elfner

    (Institute of Thermal Turbomachinery (ITS), Karlsruhe Institute of Technology (KIT), 76137 Karlsruhe, Germany
    These authors contributed equally to this work.)

  • Hans-Jörg Bauer

    (Institute of Thermal Turbomachinery (ITS), Karlsruhe Institute of Technology (KIT), 76137 Karlsruhe, Germany
    These authors contributed equally to this work.)

  • Katharina Stichling

    (Institute of Thermal Turbomachinery (ITS), Karlsruhe Institute of Technology (KIT), 76137 Karlsruhe, Germany
    These authors supported the review and editing of the article.)

  • Marco Hahn

    (Institute of Thermal Turbomachinery (ITS), Karlsruhe Institute of Technology (KIT), 76137 Karlsruhe, Germany
    These authors supported the review and editing of the article.)

Abstract

A new experimental study is presented for a combustor with a double-wall cooling design. The inner wall at the hot gas side features effusion cooling with 7-7-7 laidback fan-shaped holes, and the outer wall at the cold side features an impingement hole pattern with circular holes. Data are acquired to asses the thermal and aerodynamic behavior of the setup, using a new, scaled up, engine similar test rig. Similarity includes Reynolds, Nusselt and Biot numbers for hot gas and coolant flow. Different geometrical setups are studied by varying the cavity height between the two walls and the relative alignment of the two hole patterns at two different impingement Reynolds numbers. This article focuses on the aerodynamic performance of the setup. Instationary flow data are acquired, using a high speed stereo PIV setup. For each geometrical configuration, approximately 20 planes are recorded with a data rate of 1000 Hz by traversing the flow region of interest in the cavity between the two specimen. This fine resolution allows the reconstruction of 3D flow fields for the mean data values and an extensive analysis of transient phenomena at each plane. Time averaged data and jet-center plane transient data are presented in detail. The results show a complex flow field with a hexagonal vortex pattern in the cavity, which is mainly influenced by the cavity height and the relative alignment of the two walls. The jet Reynolds number shows small influence when analyzing normalized data. Small cavity heights show a less developed flow field with less stable vortex systems. The alignment shows a similar influence on vortex system stability, with the aligned case performing better. Additionally, statistical analysis of the jet flow and frequency domain analysis of the jet and the effusion flow are presented, showing the damping capability of the cavity, especially at increased cavity heights, and a residual low frequency pulsation of the effusion cooling inflow.

Suggested Citation

  • Thomas Jackowski & Maximilian Elfner & Hans-Jörg Bauer & Katharina Stichling & Marco Hahn, 2021. "Experimental Study of Impingement Effusion Cooled Double-Wall Combustor Liners: Aerodynamic Analysis with Stereo-PIV," Energies, MDPI, vol. 14(19), pages 1-23, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:19:p:6191-:d:645222
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    References listed on IDEAS

    as
    1. Abdulrahman H. Alenezi & Abdulrahman Almutairi & Hamad M. Alhajeri & Abdulmajid Addali & Abdelaziz A. A. Gamil, 2018. "Flow Structure and Heat Transfer of Jet Impingement on a Rib-Roughened Flat Plate," Energies, MDPI, vol. 11(6), pages 1-16, June.
    2. Thomas Jackowski & Maximilian Elfner & Hans-Jörg Bauer, 2021. "Experimental Study of Impingement Effusion-Cooled Double-Wall Combustor Liners: Thermal Analysis," Energies, MDPI, vol. 14(16), pages 1-23, August.
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    Cited by:

    1. Zhang, Yueliang & Li, Jiangheng & Xie, Jin, 2022. "Effects of lateral cooling hole configuration on a swirl-stabilized combustor," Energy, Elsevier, vol. 259(C).

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