TY - GEN
T1 - INVESTIGATION OF THE EFFECT OF BLADE PASSING ON TWO-PHASE FLOW WITHIN DISCRETE COMPRESSOR CASING RECIRCULATION CHANNEL USING PARTICLE IMAGE VELOCIMETRY
AU - Mendoza, Carlos E.
AU - Bedii Ozdemir, I.
AU - Helcig, Christian
AU - Gümmer, Volker
N1 - Publisher Copyright:
Copyright © 2023 by ASME.
PY - 2023
Y1 - 2023
N2 - Recirculation channels (RC) can improve the aerodynamic operational stability of axial compressors. The performance of compressors using RC is still unascertained during in-service operations, which might be subject to particle ingestion. Due to its inherent unsteadiness, little is known about the two-phase flow structure inside such discrete casing treatments. The present study provides the first insight into the two-phase flow within an RC via Particle Image Velocimetry, characterizing air and particle motions. The ensemble correlation method is used to obtain averaged flow field data corresponding to different blade positions with respect to the RC, providing the periodic dynamic characteristics of the flow. Measurements show that the blade passing frequency and operation condition impact the amount of recirculated air, the creation of stagnation and separation points, particle trajectories, and slip velocity inside the RC. As a result, this study shows that a robust RC design should consider the particle-wall interactions that can lead to significant erosion or fouling and possibility of blockage near the inlet.
AB - Recirculation channels (RC) can improve the aerodynamic operational stability of axial compressors. The performance of compressors using RC is still unascertained during in-service operations, which might be subject to particle ingestion. Due to its inherent unsteadiness, little is known about the two-phase flow structure inside such discrete casing treatments. The present study provides the first insight into the two-phase flow within an RC via Particle Image Velocimetry, characterizing air and particle motions. The ensemble correlation method is used to obtain averaged flow field data corresponding to different blade positions with respect to the RC, providing the periodic dynamic characteristics of the flow. Measurements show that the blade passing frequency and operation condition impact the amount of recirculated air, the creation of stagnation and separation points, particle trajectories, and slip velocity inside the RC. As a result, this study shows that a robust RC design should consider the particle-wall interactions that can lead to significant erosion or fouling and possibility of blockage near the inlet.
KW - Casing treatment
KW - Compressor
KW - Particle Image Velocimetry
KW - Particle-laden flow
KW - Recirculation channel
KW - Two-phase flow
UR - https://www.scopus.com/pages/publications/85177205019
U2 - 10.1115/GT2023-102553
DO - 10.1115/GT2023-102553
M3 - Conference contribution
AN - SCOPUS:85177205019
T3 - Proceedings of the ASME Turbo Expo
BT - Turbomachinery - Axial Flow Fan and Compressor Aerodynamics
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023
Y2 - 26 June 2023 through 30 June 2023
ER -