Aerodynamic characterization of a transonic axial flow compressor stage – with asymmetric tip clearance effects

Kumar, SS and Bhanudasji Alone, D and Thimmaiah, SM and Mudipalli, JRR and Ganguli, R and Kandagal, SB and Jana, S (2018) Aerodynamic characterization of a transonic axial flow compressor stage – with asymmetric tip clearance effects. In: Aerospace Science and Technology, 82-83 . pp. 272-283.

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Abstract

This manuscript discusses the performance of a single-stage transonic axial flow compressor with non-uniform/asymmetric rotor tip clearance. Detailed steady and unsteady experimental measurements are carried out for a compressor with non-uniform clearance over the rotor. Measurements are focused at the peak clearance region of the compressor annulus where stall inception is likely to occur. A sector-based steady-state CFD simulation is performed on the compressor stage with uniform averaged rotor running clearance obtained from the blade growth estimates at design speed using structural analysis. The role of the tip leakage vortex on the stall dynamics of the compressor is elucidated. The stall events/disturbances occurring at every two rotor revolutions are shown using hotwire measurements. Varied flow features of the transonic compressor stage are discussed for different compressor speeds investigated. The level of clearance eccentricity/asymmetry existing in this compressor due to its complex spread does not degrade the overall compressor performance behavior.

Item Type:	Journal Article
Publication:	Aerospace Science and Technology
Publisher:	Elsevier Masson SAS
Additional Information:	The copyright for this article belongs to the Elsevier Masson SAS.
Keywords:	Axial flow; Computational fluid dynamics; Fast Fourier transforms; Transonic aerodynamics; Unsteady flow, Aerodynamic characterization; Compressor performance; Hot-wire measurements; Rotating stalls; Rotor tip clearance; Tip clearance effects; Transonic axial compressors; Transonic compressor stages, Axial-flow compressors
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	02 Aug 2022 12:12
Last Modified:	02 Aug 2022 12:12
URI:	https://eprints.iisc.ac.in/id/eprint/75185

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