Study on flange geometry of steam turbine partial admission stage using unsteady flow analysis

Shinji Takada, Yasuhiro Sasao, Satoru Yamamoto, Tadashi Tanuma

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Unsteady two-dimensional flows in a steam turbine partial admission stage are numerically investigated using a CFD method developed by the authors. First, the flows through 54 nozzle and 30 rotor channels with a simple flange are calculated and the effect of the flange width on the rotor performance is predicted. Numerical results indicate that the reduction of flange thickness basically improves the operating efficiency and reduces the fluctuation of fluid force. Next, flange geometry with a sloped side wall is employed as considering a real design configuration and the flow is calculated. Finally, we discuss how the geometry is effective to reduce the fluctuation of fluid force and to improve the operating efficiency.

Original languageEnglish
Pages (from-to)753-761
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume78
Issue number788
DOIs
Publication statusPublished - 2012

Keywords

  • Flange geometry
  • Numerical simulation
  • Partial admission stage
  • Steam turbine
  • Unsteady flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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