Unsteady wet-steam flow through 2-D two-stage stator-rotor cascades in low pressure steam turbine(Ref.3,4, Click figure for animation!)
CFD technologies of turbomachine simulation have been developed in last
two-decades. Commercial codes such as Fluent, CFX, and FineTurbo can simulate
multi-stage stator-rotor cascade flows. However, those flows may be assumed
to be a perfect gas or an incompressible water flow. Recently we developed
2-D and 3-D computational codes for multi-stage stator-rotor turbine cascade
flows of moist-air and of wet-steam with nonequilibrium condensation. The
3-D code can apply to a complete multistage time-accurate calculation.
We call this code "Numerical Turbine". The Numerical Turbine
can calculate not only those flows in a steam turbine, but also flows in
a compressor of aircraft engines and industrial gas turbines considering
the condensation of moist air. Those codes are being customized for the
parallel and vector computers such the supercomputer SX-9 in Tohoku University
and PC-clusters.
Unsteady wet-steam flow through 2-D two-stage stator-rotor cascades in
low pressure steam turbine(Ref.3,4, Click figure for animation!)
Unsteady 3-D wet-steam flow through two-stage stator-rotor blade rows in
low pressure steam turbine(Left:Mach number, Mid:wetness at mid-span, Right:
wetness at cross section of first-stage rotor, based on the results in
Ref.6, Click each figure for animation!)
Unsteady 3-D wet-steam flow through three-stage stator-rotor blade rows
in low pressure steam turbine(Left:Mach number, Mid:wetness at mid-span,
Right: wetness at cross section of second-stage rotor, based on the results
in Ref.7, Click each figure for animation!)
Unsteady 3-D wet-steam flow considering nonequilibrium condensation through
three-stage stator-rotor blade rows in low pressure steam turbine(Left:wetness
at mid-span, Right: wetness near shround of third-stage, based on the results
in Ref.8, Click each figure for animation!)
Unsteady 3-D wet-steam flow through three-stage stator-rotor long blade
rows in a low pressure real steam turbine(Left:static pressure on blades,
Right: wetness at mid-span, based on the results in Ref.10, Click each
figure for animation!)
Publication lists
1. Yasuhiro Sasao and Satoru Yamamoto, Numerical Prediction of Unsteady
Flows through Turbine Stator-rotor Channels with Condensation, Proceedings
of ASME Fluids Engineering Summer Conference, FEDSM2005-77205(2005), CD-ROM.
2. Yasuhiro SASAO and Satoru YAMAMOTO and Tadashi TANUMA, Numerical Investigation
of Condensation and Turbulence in Turbine Stator-rotor Interaction, Proceedings
of 2005 Asian Congress on Gas Turbine, (2005), CD-ROM.
3.. Satoru Yamamoto, Yasuhiro Sasao, Shoichiro Sato and Kentaro Sano, Parallel-Implicit
Computation of Three-dimensional Multistage Stator-Rotor Cascade Flows
with Condensation, 18th AIAA CFD Conference-Miami, AIAA Paper 2007-4460,
June, 2007.
4. Satoru Yamamoto, Yasuhiro Sasao, Kentaro Sano, Hiroshi Satsuki, Kouichi Ishizaka and Hiroharu Ooyama, Parallel Computation
of Condensate Flows through 2-D and 3-D Multistage Turbine Cascades, Int.
Gas Turbine Congress 2007(IGTC'07)-Tokyo, Dec.2007, CD-ROM.
5. Yasuhiro Sasao, Hiroto Kato, Satoru Yamamoto, Hiroshi Satsuki, Hiroharu
Ooyama, and Kouichi Ishizaka, Numerical and Experimental Investigations
of Unsteady 3-D Flow through Two-stage Cascades in Steam Turbine Model,
Proc. Int. Conf. on Power Engineering 2009, No.09-205, (2009), 2-479-2-484.
6. Satoru Yamamoto, Yasuhiro Sasao, Hiroto Kato, Hiroshi Satsuki, Hiroharu
Ooyama, and Kouichi Ishizaka, Numerical and Experimental Investigation
of Unsteady 3-D Wet-steam Flows through Two-stage Stator-rotor Cascade
Channels, Proc. ASME Turbo Expo 2010, GT2010-22796, (2010), CD-ROM.
7. Satoshi Miyake, Yasuhiro Sasao, Satoru Yamamoto, Soichiro Tabata, Toshihiro
Miyawaki and Hiroharu Ooyama, Simulation of Unsteady 3-D Wet-steam Flows
through Three-stage Stator-rotor Blade Rows with Equilibrium and Nonequilibrium
Condensations, Proc. ASME Turbo Expo, GT2012-68828, (2012), CD-ROM.
8. Satoshi Miyake, Satoru Yamamoto, Yasuhiro Sasao, Kazuhiro Momma, Toshihiro Miyawaki and Hiroharu Ooyama, Unsteady Flow Effect on Nonequilibrium Condensation in 3-D Low Pressure Steam Turbine Stages, Proc. ASME Turbo Expo 2013, San Antonio, GT2013-94832, (2013), CD-ROM.
9. Yasuhiro Sasao, Satoshi Miyake, Kenji Okazaki, Satoru Yamamoto and Hiroharu
Ooyama, Eulerian-Lagragian Numerical Simulation of Wet Steam Flow through
Multi-stage Steam Turbine, Proc. ASME Turbo Expo 2013, San Antonio, GT2013-95945, (2013), CD-ROM.
10. Satoshi Miyake, Itsuro Koda, Satoru Yamamoto, Yasuhiro Sasao, Kazuhiro
Momma, Toshihiro Miyawaki and Hiroharu Ooyama, Unsteady Wake and Vortex
Interactions in 3-D Steam Turbine Low Pressure Final Three Stages, Proc.
ASME Turbo Expo 2014, Dusseldorf, GT2014-25491, (2014), CD-ROM.
11. Satoshi Miyake, Hironori Miyazawa, Satoru Yamamoto, Yasuhiro Sasao, Kazuhiro
Momma,Hiroharu Ooyama and Toshihiro Miyawaki, Unsteady Wet-steam Flows
through Low Pressure Turbine Final Three Stages considering Blade Number,
Proc. ASME Turbo Expo 2015, Montreal, GT2015-42366, (2015), 11 pages.