Decoupling and reconstruction analysis in a transonic axial compressor using the dynamic mode decomposition method

نویسندگان

چکیده

Unsteady flow is highly related to loss and aerodynamic performance degradation in the axial compressor. In this paper, dynamic mode decomposition method was used investigate in-depth structures evolutionary mechanisms of internal field. Four main were observed through field decoupling: oscillation tip leakage vortex (TLV) region, circumferential migration leakage-induced (LIV), rear part (RLV), leading edge (LEV). All those four indicated presence high disturbance regions. The reconstruction dominant revealed that unsteady mechanism mainly consisted two components: evolution RLV LIV. It further primary reason for formation low-energy fluid mass within passage; under influence “leading overflow,” LIV eventually fused with LEV. blocking effect LEV led a region at adjacent blade pressure surface, resulting synchronous moment between emergence analysis components supported TLV breakdown as cause unsteadiness. This study laid foundation accurate unsteadiness control.

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ژورنال

عنوان ژورنال: Physics of Fluids

سال: 2023

ISSN: ['1527-2435', '1089-7666', '1070-6631']

DOI: https://doi.org/10.1063/5.0160392