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Unsteady Wake and Vortex Interactions in 3-D Steam Turbine Low Pressure Final Three Stages

[+] Author Affiliations
Satoshi Miyake, Itsuro Koda, Satoru Yamamoto

Tohoku University, Sendai, Japan

Yasuhiro Sasao

Teikyo University, Utsunomiya, Japan

Kazuhiro Momma, Toshihiro Miyawaki, Hiroharu Ooyama

Mitsubishi Heavy Industries, Ltd., Takasago, Japan

Paper No. GT2014-25491, pp. V01BT27A013; 10 pages
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4558-5
  • Copyright © 2014 by ASME


A practical unsteady 3-D wet-steam flow through stator-rotor blade rows in a low-pressure steam turbine final three stages is numerically investigated. In ASME Turbo Expo 2013, we presented numerical results of unsteady 3-D wet-steam flows through three-stage stator-rotor low-aspect blade rows in a low-pressure steam turbine model designed by Mitsubishi Heavy Industry (MHI) assuming nonequilibrium condensation. The last study is extended to the final three stages with large aspect blade rows. The discussion in this paper is mainly focused on the effect of unsteady wake and vortex interactions on nonequilibrium condensation computed by our in-house code “Numerical Turbine System (NTS)”. In addition, the NTS and the future perspective are also briefly introduced.

Copyright © 2014 by ASME



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