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Flow Field Investigation of a Single Engine Valve Using PIV, POD, and LES

Author

Listed:
  • Jana Hoffmann

    (Institute of Thermal and Fluid Engineering, University of Applied Sciences and Arts Northwestern Switzerland, Klosterzelgstrasse 2, 5210 Windisch, Switzerland)

  • Niklas Mirsch

    (Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, Forckenbeckstrasse 4, 52074 Aachen, Germany)

  • Walter Vera-Tudela

    (Institute of Thermal and Fluid Engineering, University of Applied Sciences and Arts Northwestern Switzerland, Klosterzelgstrasse 2, 5210 Windisch, Switzerland)

  • Dario Wüthrich

    (Institute of Thermal and Fluid Engineering, University of Applied Sciences and Arts Northwestern Switzerland, Klosterzelgstrasse 2, 5210 Windisch, Switzerland)

  • Jorim Rosenberg

    (Institute of Thermal and Fluid Engineering, University of Applied Sciences and Arts Northwestern Switzerland, Klosterzelgstrasse 2, 5210 Windisch, Switzerland)

  • Marco Günther

    (Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, Forckenbeckstrasse 4, 52074 Aachen, Germany)

  • Stefan Pischinger

    (Thermodynamics of Mobile Energy Conversion Systems, RWTH Aachen University, Forckenbeckstrasse 4, 52074 Aachen, Germany)

  • Daniel A. Weiss

    (Institute of Thermal and Fluid Engineering, University of Applied Sciences and Arts Northwestern Switzerland, Klosterzelgstrasse 2, 5210 Windisch, Switzerland)

  • Kai Herrmann

    (Institute of Thermal and Fluid Engineering, University of Applied Sciences and Arts Northwestern Switzerland, Klosterzelgstrasse 2, 5210 Windisch, Switzerland)

Abstract

Due to stringent emission regulations, it is of practical significance to understand cycle-to-cycle variations in the combustion of fossil or renewable fuels to reach future emission regulations. The present study aims to conduct a parametric investigation to analyse the influence of the valve lift and different mass flows of an inlet valve of the test engine “Flex-OeCoS” on the flow structures. To gain a deeper understanding of the flow behaviour, an optical test bench for 2D Particle Image Velocimetry (PIV) and a Large Eddy Simulation (LES) are used. Turbulence phenomena are investigated using Proper Orthogonal Decomposition (POD) with a quadruple decomposition and the Reynolds stress transport equation. The results show good agreement between the PIV and LES. Moreover, the main flow structures are primarily affected by valve lift while being unaffected by mass flow variation. The turbulent kinetic energy within the flow field increases quadratically to the mass flow and to the decreasing valve lift, where large high-energetic flow structures are observed in the vicinity of the jet and small low-energetic structures are homogeneously distributed within the flow field. Furthermore, the convective flux, the turbulent diffusive flux, the rate of change, and the production of specific Reynolds stress are the dominant terms within the specific Reynolds stress transport equation.

Suggested Citation

  • Jana Hoffmann & Niklas Mirsch & Walter Vera-Tudela & Dario Wüthrich & Jorim Rosenberg & Marco Günther & Stefan Pischinger & Daniel A. Weiss & Kai Herrmann, 2023. "Flow Field Investigation of a Single Engine Valve Using PIV, POD, and LES," Energies, MDPI, vol. 16(5), pages 1-31, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2402-:d:1086296
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    References listed on IDEAS

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    1. Jana Hoffmann & Walter Vera-Tudela & Niklas Mirsch & Dario Wüthrich & Bruno Schneider & Marco Günther & Stefan Pischinger & Daniel A. Weiss & Kai Herrmann, 2023. "Investigation of Flow Fields Emanating from Two Parallel Inlet Valves Using LES, PIV, and POD," Energies, MDPI, vol. 16(19), pages 1-29, September.

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