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.
منابع مشابه
Unsteady Transonic Flows in an Axial Flow Compressor*
Introduction. This paper deals with some transonic flow problems for the supersonic axial flow compressor: these arise in connection with flutter analysis for fan blading. Very detailed solutions for unsteady plane transonic flows through a cascade of flat plates have been given by Goldstein Braun and Adamczyk (1977) and Nagashima and Whitehead (1977), see also Goldstein (1975), Kurosaka (1974)...
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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