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Proceedings Papers

Unsteady Flow Effects on Steam Turbine Last Stage Blades at Very Low Load Operating Condition

Tadashi Tanuma, Michio Ogawa, Hiroshi Okuda, Gaku Hashimoto, Naoki Shibukawa, Kenichi Okuno, Tomohiko Tsukuda

Proc. ASME. GT2018, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, V008T29A028, June 11–15, 2018

Paper No: GT2018-76498

DOI: https://doi.org/10.1115/GT2018-76498

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Topics: Blades, Steam turbines, Stress, Unsteady flow, Structural analysis, Boundary-value problems, Annulus, Design, Pressure, Vibration

Proceedings Papers

Effects of Upstream Sprayed Water on Steam Flow Conditions and Blade Vibrations of a Low Pressure Steam Turbine

Naoki Shibukawa, Yoshihiro Ishikawa, Yoshifumi Iwasaki, Kota Chiba

Proc. ASME. GT2016, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T26A043, June 13–17, 2016

Paper No: GT2016-57954

DOI: https://doi.org/10.1115/GT2016-57954

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Topics: Blades, Flow (Dynamics), Pressure, Steam, Steam turbines, Vibration, Water, Stress, Turbines, Flashing

Proceedings Papers

Aerodynamic and Structural Numerical Investigation of Unsteady Flow Effects on Last Stage Blades

Tadashi Tanuma, Hiroshi Okuda, Gaku Hashimoto, Satoru Yamamoto, Naoki Shibukawa, Kenichi Okuno, Hiroshi Saeki, Tomohiko Tsukuda

Proc. ASME. GT2015, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T26A035, June 15–19, 2015

Paper No: GT2015-43848

DOI: https://doi.org/10.1115/GT2015-43848

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Topics: Blades, Unsteady flow, Rotating blades, Diffusers, Exhaust systems, Pressure, Boundary-value problems, Finite element analysis, Flow (Dynamics), Steam turbines

Journal Articles

An Experimental Investigation of the Influence of Flash-Back Flow on Last Three Stages of Low Pressure Steam Turbines

Naoki Shibukawa, Takao Fukushima, Yoshifumi Iwasaki, Yoshiaki Takada, Itaru Murakami, Takashi Suzuki

J. Eng. Gas Turbines Power. May 2015, 137(5): 052601.

Paper No: GTP-14-1394

DOI: https://doi.org/10.1115/1.4028674

Published Online: May 1, 2015

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Topics: Blades, Drops, Flow (Dynamics), Pressure, Steam, Stress, Vibration, Water, Turbines, Steam turbines

Proceedings Papers

Numerical Investigation of Steam Turbine Exhaust Diffuser Flows and Their Three Dimensional Interaction Effects on Last Stage Efficiencies

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

Proc. ASME. GT2014, Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V01BT27A039, June 16–20, 2014

Paper No: GT2014-26665

DOI: https://doi.org/10.1115/GT2014-26665

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Topics: Diffusers, Exhaust systems, Flow (Dynamics), Steam turbines, Design, Numerical analysis, Pressure, Blades, Design engineering, Energy generation

Proceedings Papers

An Experimental Investigation of Thermal Wetness Loss in the Full Scale Size Low Pressure Turbine

Tomohiko Tsukuda, Hiroki Sato, Daisuke Nomura, Sakae Kawasaki, Naoki Shibukawa

Proc. ASME. GT2014, Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V01BT27A027, June 16–20, 2014

Paper No: GT2014-26012

DOI: https://doi.org/10.1115/GT2014-26012

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Topics: Pressure, Turbines, Equilibrium (Physics), Condensation, Superheating, Temperature, Enthalpy, Flow (Dynamics), Probes, Supercooling

Proceedings Papers

An Experimental Investigation of the Influence of Flash-Back Flow on Last Three Stages of Low Pressure Steam Turbines

Naoki Shibukawa, Yoshifumi Iwasaki, Yoshiaki Takada, Itaru Murakami, Takashi Suzuki, Takao Fukushima

Proc. ASME. GT2014, Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V01BT27A047, June 16–20, 2014

Paper No: GT2014-26897

DOI: https://doi.org/10.1115/GT2014-26897

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Topics: Flow (Dynamics), Pressure, Steam turbines, Blades, Stress, Vibration, Flashing, Steam, Turbines, Water

Proceedings Papers

Unsteady Flow Features and Vibration Stresses of an Actual Size Steam Turbine Last Stage in Various Low Load Conditions

Naoki Shibukawa, Yoshifumi Iwasaki, Mitsunori Watanabe

Proc. ASME. GT2013, Volume 5B: Oil and Gas Applications; Steam Turbines, V05BT25A030, June 3–7, 2013

Paper No: GT2013-95219

DOI: https://doi.org/10.1115/GT2013-95219

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Topics: Steam turbines, Stress, Unsteady flow, Vibration, Blades, Pressure, Computational fluid dynamics, Flow (Dynamics), Fluctuations (Physics), Annulus

Proceedings Papers

An Upwind Eulerian-Eulerian Model for Non-Equilibrium Condensation in Steam Turbines

Xiaofeng Zhu, Xin Yuan, Zhirong Lin, Naoki Shibukawa, Tomohiko Tsukuda, Yoshiki Niizeki, Tadashi Tanuma

Proc. ASME. GT2013, Volume 5B: Oil and Gas Applications; Steam Turbines, V05BT25A024, June 3–7, 2013

Paper No: GT2013-95047

DOI: https://doi.org/10.1115/GT2013-95047

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Topics: Condensation, Equilibrium (Physics), Steam turbines, Steam, Cascades (Fluid dynamics), Density, Eigenvalues, Flow (Dynamics), Internal energy (Physics), Jacobian matrices

Proceedings Papers

Aerodynamic Interaction Effects From Upstream and Downstream on the Down-Flow Type Exhaust Diffuser Performance in a Low Pressure Steam Turbine

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

Proc. ASME. GT2013, Volume 5B: Oil and Gas Applications; Steam Turbines, V05BT25A044, June 3–7, 2013

Paper No: GT2013-95901

DOI: https://doi.org/10.1115/GT2013-95901

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Topics: Diffusers, Exhaust systems, Flow (Dynamics), Pressure, Steam turbines, Turbines, Blades, Separation (Technology), Steam, Boundary layers

Proceedings Papers

The Impact of Rotor Inlet Cavity Volume and Length Scale on Efficiency

Konstantinos G. Barmpalias, Reza S. Abhari, Anestis I. Kalfas, Naoki Shibukawa, Takashi Sasaki

Proc. ASME. GT2012, Volume 6: Oil and Gas Applications; Concentrating Solar Power Plants; Steam Turbines; Wind Energy, 345-354, June 11–15, 2012

Paper No: GT2012-68076

DOI: https://doi.org/10.1115/GT2012-68076

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Topics: Cavities, Rotors, Flow (Dynamics), Cavity walls, Corners (Structural elements), Geometry, Turbines, Turbomachinery, Vortices

Proceedings Papers

Influence of Wetness on Efficiency of the Full Scale Size Low Pressure Turbines

Tomohiko Tsukuda, Hiroyuki Kawagishi, Naoki Shibukawa, Tadayuki Hashidate, Koichi Goto, Tsuguhisa Tashima

Proc. ASME. GT2012, Volume 6: Oil and Gas Applications; Concentrating Solar Power Plants; Steam Turbines; Wind Energy, 707-716, June 11–15, 2012

Paper No: GT2012-70056

DOI: https://doi.org/10.1115/GT2012-70056

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Topics: Pressure, Turbines, Stress, Blades, Braking, Steam, Design, Flow (Dynamics)

Proceedings Papers

An Experimental Flow Investigation of Low Pressure Turbine Stages With Various Wet Conditions

Naoki Shibukawa, Tomohiko Tsukuda, Tadayuki Hashidate, Hiroyuki Kawagishi, Tatsuro Uchida, Koichi Goto

Proc. ASME. GT2012, Volume 6: Oil and Gas Applications; Concentrating Solar Power Plants; Steam Turbines; Wind Energy, 637-646, June 11–15, 2012

Paper No: GT2012-69613

DOI: https://doi.org/10.1115/GT2012-69613

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Topics: Flow (Dynamics), Pressure, Turbines, Steam, Blades, Stators, Steam turbines, Design, Water

Proceedings Papers

Numerical Investigation of Three-Dimensional Wet Steam Flows in an Exhaust Diffuser With Non-Uniform Inlet Flows From the Turbine Stages in a Steam Turbine

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

Proc. ASME. GT2012, Volume 6: Oil and Gas Applications; Concentrating Solar Power Plants; Steam Turbines; Wind Energy, 589-602, June 11–15, 2012

Paper No: GT2012-69496

DOI: https://doi.org/10.1115/GT2012-69496

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Topics: Diffusers, Exhaust systems, Flow (Dynamics), Steam, Steam turbines, Turbines, Blades, Evaluation methods, Design, Design engineering

Journal Articles

Design Considerations for Axial Steam Turbine Rotor Inlet Cavity Volume and Length Scale

Konstantinos G. Barmpalias, Reza S. Abhari, Anestis I. Kalfas, Toshio Hirano, Naoki Shibukawa, Takashi Sasaki

J. Turbomach. September 2012, 134(5): 051031.

DOI: https://doi.org/10.1115/1.4004827

Published Online: May 31, 2012

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Topics: Cavities, Flow (Dynamics), Rotors, Stators, Vortices, Blades, Design, Pressure

Proceedings Papers

Three Dimensional Optimum Design of a Steam Turbine Stage With NURBS Curves

Tomohiro Tejima, Yoshiki Niizeki, Naoki Shibukawa, Akihiro Onoda, Satoru Watanabe, Xin Yuan, Zhirong Lin, Xiaofeng Zhu

Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 1773-1783, July 24–29, 2011

Paper No: AJK2011-05011

DOI: https://doi.org/10.1115/AJK2011-05011

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Topics: Design, Steam turbines, Shapes, Blades, Optimization, Computational fluid dynamics, Turbine blades, Turbines, Computers, Exhaust systems

Proceedings Papers

Numerical Investigation of Exhaust Diffuser Performances in Low Pressure Turbine Casings

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Shinji Takada, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 2347-2357, June 6–10, 2011

Paper No: GT2011-45677

DOI: https://doi.org/10.1115/GT2011-45677

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Topics: Diffusers, Exhaust systems, Pressure, Turbines, Computational fluid dynamics, Steam turbines, Boundary layers, Boundary-value problems, Condensation, Design

Proceedings Papers

A Correlation Between Vibration Stresses and Flow Features of Steam Turbine Long Blades in Low Load Conditions

Naoki Shibukawa, Tomohiro Tejima, Yoshifumi Iwasaki, Itaru Murakami, Ikuo Saito

Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 2437-2446, June 6–10, 2011

Paper No: GT2011-46368

DOI: https://doi.org/10.1115/GT2011-46368

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Topics: Blades, Flow (Dynamics), Steam turbines, Stress, Vibration, Pressure, Computational fluid dynamics, Aerodynamics, Fluid-dynamic forces, Simulation

Proceedings Papers

Design Considerations for Axial Steam Turbine Rotor Inlet Cavity Volume and Length Scale

Konstantinos G. Barmpalias, Anestis I. Kalfas, Reza S. Abhari, Toshio Hirano, Naoki Shibukawa, Takashi Sasaki

Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 2243-2254, June 6–10, 2011

Paper No: GT2011-45127

DOI: https://doi.org/10.1115/GT2011-45127

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Topics: Cavities, Design, Rotors, Steam turbines, Vortices, Stators, Aerodynamics, Flow (Dynamics)

Proceedings Papers

Development of 60Hz Titanium 48-Inch Last Stage Blade for Steam Turbine

Yoriharu Murata, Naoki Shibukawa, Itaru Murakami, Joji Kaneko, Kenichi Okuno

Proc. ASME. POWER2011, ASME 2011 Power Conference, Volume 1, 695-700, July 12–14, 2011

Paper No: POWER2011-55465

DOI: https://doi.org/10.1115/POWER2011-55465

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Topics: Blades, Steam turbines, Titanium, Design, Design engineering, Test facilities, Wheels, Annulus, Combined cycle power stations, Computational fluid dynamics

Journal citation

NARROW

Unsteady Flow Effects on Steam Turbine Last Stage Blades at Very Low Load Operating Condition

Effects of Upstream Sprayed Water on Steam Flow Conditions and Blade Vibrations of a Low Pressure Steam Turbine

Aerodynamic and Structural Numerical Investigation of Unsteady Flow Effects on Last Stage Blades

An Experimental Investigation of the Influence of Flash-Back Flow on Last Three Stages of Low Pressure Steam Turbines

Numerical Investigation of Steam Turbine Exhaust Diffuser Flows and Their Three Dimensional Interaction Effects on Last Stage Efficiencies

An Experimental Investigation of Thermal Wetness Loss in the Full Scale Size Low Pressure Turbine

An Experimental Investigation of the Influence of Flash-Back Flow on Last Three Stages of Low Pressure Steam Turbines

Unsteady Flow Features and Vibration Stresses of an Actual Size Steam Turbine Last Stage in Various Low Load Conditions

An Upwind Eulerian-Eulerian Model for Non-Equilibrium Condensation in Steam Turbines

Aerodynamic Interaction Effects From Upstream and Downstream on the Down-Flow Type Exhaust Diffuser Performance in a Low Pressure Steam Turbine

The Impact of Rotor Inlet Cavity Volume and Length Scale on Efficiency

Influence of Wetness on Efficiency of the Full Scale Size Low Pressure Turbines

An Experimental Flow Investigation of Low Pressure Turbine Stages With Various Wet Conditions

Numerical Investigation of Three-Dimensional Wet Steam Flows in an Exhaust Diffuser With Non-Uniform Inlet Flows From the Turbine Stages in a Steam Turbine

Design Considerations for Axial Steam Turbine Rotor Inlet Cavity Volume and Length Scale

Three Dimensional Optimum Design of a Steam Turbine Stage With NURBS Curves

Numerical Investigation of Exhaust Diffuser Performances in Low Pressure Turbine Casings

A Correlation Between Vibration Stresses and Flow Features of Steam Turbine Long Blades in Low Load Conditions

Design Considerations for Axial Steam Turbine Rotor Inlet Cavity Volume and Length Scale

Development of 60Hz Titanium 48-Inch Last Stage Blade for Steam Turbine

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