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Aerodynamic behavior of a transonic axial flow compressor stage with self-recirculating casing treatment

Kumar, SS and Bhanudasji Alone, D and Thimmaiah, SM and Mudipalli, JRR and Kumar, L and Ganguli, R and Kandagal, SB and Jana, S (2021) Aerodynamic behavior of a transonic axial flow compressor stage with self-recirculating casing treatment. In: Aerospace Science and Technology, 112 .

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Official URL: https://doi.org/10.1016/j.ast.2021.106587


In this manuscript, a new discrete type of passive Self-Recirculating Casing Treatment (RCT) is designed for a transonic axial compressor stage, fabricated, and tested for its performance. Parametric evaluation of the casing flush-mounted RCT for injection skew angle is studied experimentally and numerically to achieve considerable stall margin improvements. Detailed flow investigations are carried out for the RCT configurations and baseline solid casing behavior at different flow conditions using steady and unsteady measurements. The unsteadiness in the flow and the rotating stall signatures are captured through Kulite pressure sensors. Results indicate improvements in the stall margin and other overall compressor performance parameters for the investigated speeds. Improvements of stall margin in axial compressor stage with self-recirculating casing treatment are found to be because of the RCT by investing the already worked high-pressure fluid is able to overcome losses associated with the tip leakage flow. There is a delay in the onset of rotating stall instability with casing treatment which plays a role in the enhanced performance improvements. © 2021 Elsevier Masson SAS

Item Type: Journal Article
Publication: Aerospace Science and Technology
Publisher: Elsevier Masson s.r.l.
Additional Information: The copyright for this article belongs to Elsevier Masson s.r.l.
Keywords: Axial flow turbomachinery, Axial compressors; Casing treatment; Compressor performance; Flow investigations; High-pressure fluids; Rotating stalls; Tip leakage flow; Transonic axial compressors, Axial-flow compressors
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 20 Feb 2023 11:15
Last Modified: 20 Feb 2023 11:15
URI: https://eprints.iisc.ac.in/id/eprint/80424

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