Publication detail
Effect of asymmetric diffuser deflector on even distribution of steam leaving blade section of steam turbine: comparative computational study
BOBČÍK, M. POSPÍŠIL, J. FIEDLER, J.
English title
Effect of asymmetric diffuser deflector on even distribution of steam leaving blade section of steam turbine: comparative computational study
Type
journal article in Web of Science
Language
en
Original abstract
This study presents a computational analysis comparing two designs of steam turbine diffuser deflectors: a conventional axisymmetric design and an innovative asymmetric design. The computational comparison is carried out for a real turbine with a power output of 1.090 MW. Utilizing ANSYS CFX simulations based on the finite volume method, the innovative deflector demonstrates extending the steam expansion, which is directly related to the up to 5 % increase in the output power of the turbine last stage blades. The asymmetric steam turbine diffuser deflector geometry promotes a more uniform static pressure distribution and reduces flow separation and recirculation zones, leading to decreased pressure losses between the turbine's inner and outer casings.
English abstract
This study presents a computational analysis comparing two designs of steam turbine diffuser deflectors: a conventional axisymmetric design and an innovative asymmetric design. The computational comparison is carried out for a real turbine with a power output of 1.090 MW. Utilizing ANSYS CFX simulations based on the finite volume method, the innovative deflector demonstrates extending the steam expansion, which is directly related to the up to 5 % increase in the output power of the turbine last stage blades. The asymmetric steam turbine diffuser deflector geometry promotes a more uniform static pressure distribution and reduces flow separation and recirculation zones, leading to decreased pressure losses between the turbine's inner and outer casings.
Keywords in English
Steam turbineDiffuserDeflectorCFD modelingPressure loss
Released
09.06.2025
Publisher
Elsevier
Location
Holandsko
ISSN
2214-157X
Volume
73
Number
September
Pages from–to
1–10
Pages count
10
BIBTEX
@article{BUT198159,
author="Marek {Bobčík} and Jiří {Pospíšil} and Jan {Fiedler},
title="Effect of asymmetric diffuser deflector on even distribution of steam leaving blade section of steam turbine: comparative computational study",
year="2025",
volume="73",
number="September",
month="June",
pages="1--10",
publisher="Elsevier",
address="Holandsko",
issn="2214-157X"
}