TY - JOUR
T1 - NUMERICAL INVESTIGATION OF STATOR SHROUD LEAKAGE EFFECTS IN A 1.5-STAGE LOW-SPEED AXIAL COMPRESSOR
AU - Hopfinger, M.
AU - Gümmer, V.
N1 - Publisher Copyright:
Copyright © 2021 by the Authors.
PY - 2021
Y1 - 2021
N2 - Gaps and leakage mass flows are always occurring between steady and rotating parts in turbomachines. Losses occur due to entropy generation in mixing processes of lowmomentum leakage flows and the main flow. These loss-inducing mixing processes are responsible for a significant amount of compressor performance degradation. This paper describes the numerical investigation of shroud leakage effects in a 1.5-stage low-speed compressor using tandem stator vanes. The aim is to investigate the influence of the leakage mass flow on loss generation in tandem stator rows. The focus is on the relation of leakage mass flow, efficiency degradation, and operating range. An analysis of the flow field within the cavity is conducted. Moreover, emphasis is put on the interaction of the leakage flow with the development of three-dimensional blockage in the tandem endwall region.
AB - Gaps and leakage mass flows are always occurring between steady and rotating parts in turbomachines. Losses occur due to entropy generation in mixing processes of lowmomentum leakage flows and the main flow. These loss-inducing mixing processes are responsible for a significant amount of compressor performance degradation. This paper describes the numerical investigation of shroud leakage effects in a 1.5-stage low-speed compressor using tandem stator vanes. The aim is to investigate the influence of the leakage mass flow on loss generation in tandem stator rows. The focus is on the relation of leakage mass flow, efficiency degradation, and operating range. An analysis of the flow field within the cavity is conducted. Moreover, emphasis is put on the interaction of the leakage flow with the development of three-dimensional blockage in the tandem endwall region.
KW - Cavity flow field
KW - Endwall loss mechanisms
KW - Tandem aerodynamics
UR - http://www.scopus.com/inward/record.url?scp=85177649478&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85177649478
SN - 2313-0067
JO - European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC
JF - European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC
T2 - 14th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2021
Y2 - 12 April 2021 through 16 April 2021
ER -