Aeroelastic Aspects of Axial Compressor Stage With Self-Recirculating Casing Treatment

Satish Kumar, S and Alone, DB and Thimmaiah, SM and Mudipalli, JRR and Kumar, L and Jana, S and Kandagal, SB and Ganguli, R (2022) Aeroelastic Aspects of Axial Compressor Stage With Self-Recirculating Casing Treatment. In: Journal of Turbomachinery, 144 (6).

PDF jou_tur_144-6_2022.pdf - Published Version Restricted to Registered users only Download (2MB) | Request a copy

Abstract

For successful implementation of casing treatment designs in axial compressors, apart from the stall margin improvement benefits, aeroelasticity also plays a major role. This manuscript addresses the not often discussed aeroelastic aspects of a new discrete type of passive self-recirculating casing treatment (RCT) designed for a transonic axial compressor stage. Experiments are carefully designed for synchronized measurement of the unsteady fluidic disturbances and vibrations during rotating stall for compressor with baseline solid casing and self-RCT. The modal characteristics of the axial compressor rotor-disk assembly are studied experimentally and numerically. Experimentally it is observed that the rotating stall cells excite the blades in their fundamental mode in a compressor with baseline solid casing at the stall flow condition. In contrast, there is no excitation of the blades in the compressor with self-RCT at the same solid casing stall flow condition. Also, the self-RCT compared to the solid casing can significantly reduce the overall vibration levels of the blades that are excited at the stall flow condition. The casing treatment is able to alter the flow field near the tip region of the rotor blade, and hence influencing the forcing function of the rotating cantilever blades to have the aeroelastic benefit. Copyright © 2022 by ASME.

Item Type:	Journal Article
Publication:	Journal of Turbomachinery
Publisher:	American Society of Mechanical Engineers (ASME)
Additional Information:	The copyright for this article belongs to American Society of Mechanical Engineers (ASME)
Keywords:	Axial flow turbomachinery; Compressors; Elastic waves, Aeromechanical; Aeromechanical instability; Axial compressors; Casing treatment; Compressor stall; Flow condition; Self-recirculating casing treatment; Stall margin; Transonic axial compressors; Vibration, Aeroelasticity
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	17 May 2022 06:15
Last Modified:	17 May 2022 06:15
URI:	https://eprints.iisc.ac.in/id/eprint/71743

Actions (login required)

View Item