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Analysis of Different POD Processing Methods for SPIV-Measurements in Compressor Cascade Tip Leakage Flow

Author

Listed:
  • Lei Shi

    (School of Energy and Power Engineering, Beihang University, Beijing 100191, China)

  • Hongwei Ma

    (School of Energy and Power Engineering, Beihang University, Beijing 100191, China)

  • Lixiang Wang

    (Midea Corporate Research Center, Foshan 528300, China)

Abstract

Though the proper orthogonal decomposition (POD) method has been widely adopted in flow analysis, few publications have systematically studied the influence of different POD processing methods on the POD results. This paper investigates the effects of different decomposition regions and decomposition dimensionalities on POD decomposition and reconstruction concerning the tip flow in the compressor cascade. Stereoscopic particle image velocimetry (SPIV) measurements in the blade channel are addressed to obtain the original flow field. Through vortex core identification, development of the tip leakage vortex along the chord is described. Afterwards, each plane is energetically decomposed by POD. Using the identified vortex core center as the geometric center, the effects of different decomposition regions with respect to the vortex core are analyzed. Furthermore, the effects of different single velocity-components as well as their combination are compared. The effect of different decomposition regions on the mode 1 energy fraction mainly impacts the streamwise velocity component. Though the addition of W velocity component in the decomposition does change the spatial structures of high-order modes, it does not change the dynamic results of reconstruction using a finite number of POD modes. UV global analysis is better for capturing the kinetic physics of the tip leakage vortex (TLV) wandering.

Suggested Citation

  • Lei Shi & Hongwei Ma & Lixiang Wang, 2019. "Analysis of Different POD Processing Methods for SPIV-Measurements in Compressor Cascade Tip Leakage Flow," Energies, MDPI, vol. 12(6), pages 1-25, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1021-:d:214327
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    References listed on IDEAS

    as
    1. Rong Guo & Rennian Li & Renhui Zhang, 2018. "Reconstruction and Prediction of Flow Field Fluctuation Intensity and Flow-Induced Noise in Impeller Domain of Jet Centrifugal Pump Using Gappy POD Method," Energies, MDPI, vol. 12(1), pages 1-17, December.
    2. Mohammed El-Adawy & Morgan R. Heikal & A. Rashid A. Aziz & Muhammad I. Siddiqui & Shahzad Munir, 2017. "Characterization of the Inlet Port Flow under Steady-State Conditions Using PIV and POD," Energies, MDPI, vol. 10(12), pages 1-16, November.
    3. Mohammed El-Adawy & Morgan R. Heikal & A. Rashid A. Aziz & Ibrahim Khalil Adam & Mhadi A. Ismael & Mohammed E. Babiker & Masri B. Baharom & Firmansyah & Ezrann Zharif Zainal Abidin, 2018. "On the Application of Proper Orthogonal Decomposition (POD) for In-Cylinder Flow Analysis," Energies, MDPI, vol. 11(9), pages 1-22, August.
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    Cited by:

    1. Artur J. Jaworski, 2019. "Special Issue “Fluid Flow and Heat Transfer”," Energies, MDPI, vol. 12(16), pages 1-4, August.

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