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Proceedings Papers

Comprehensive Simulation of Moisture Loss in LP Steam Turbine Based on 3D Unsteady Eulerian-Lagrangian Solver

Yasuhiro Sasao, Takeshi Kudo, Kiyoshi Segawa, Soichiro Tabata, Shigeki Senoo, Ryo Takata
Proc. ASME. GT2023, Volume 10: Steam Turbine, V010T20A016, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103379
https://doi.org/10.1115/GT2023-103379
View Paper titled, Comprehensive Simulation of Moisture Loss in LP Steam Turbine Based on 3D Unsteady Eulerian-Lagrangian Solver
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Topics: Simulation, Steam turbines, Turbines, Supercooling, Computational fluid dynamics, Momentum, Temperature, Water, Condensation, Drops
Proceedings Papers

Wetness Measurement and Droplet Transport Analysis in Actual Steam Test on a Scaled Low Pressure Turbine

Yasuhiro Sasao, Kiyoshi Segawa, Takeshi Kudo, Ryo Takata, Masaki Osako, Satoru Yamamoto
Proc. ASME. GT2020, Volume 9: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Steam Turbine, V009T23A025, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16117
https://doi.org/10.1115/GT2020-16117
View Paper titled, Wetness Measurement and Droplet Transport Analysis in Actual Steam Test on a Scaled Low Pressure Turbine
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Topics: Drops, Pressure, Steam, Turbines, Blades, Computational fluid dynamics, Probes, Steam turbines, Erosion, Errors
Proceedings Papers

Development and Verification Tests of Titanium 50-Inch and 60-Inch Last Stage Blades for Steam Turbines

Shigeki Senoo, Takeshi Kudo, Hisataka Fukushima, Kiyoshi Segawa, Kazuya Sakakibara
Proc. ASME. GT2019, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, V008T29A001, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-90003
https://doi.org/10.1115/GT2019-90003
View Paper titled, Development and Verification Tests of Titanium 50-Inch and 60-Inch Last Stage Blades for Steam Turbines
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Topics: Blades, Steam turbines, Titanium, Flow (Dynamics), Rotors, Shock waves, Stators, Annulus, Exhaust systems, Pressure
Journal Articles

Experimental Investigation of the Grouped Blade Vibration for Steam Turbine by Noncontact Sensors

Tomomi Nakajima, Kiyoshi Segawa, Hiromichi Kitahara, Akimitsu Seo, Yutaka Yamashita, Takeshi Kudo
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 052603.
Paper No: GTP-17-1406
https://doi.org/10.1115/1.4038282
Published Online: January 10, 2018
View Article titled, Experimental Investigation of the Grouped Blade Vibration for Steam Turbine by Noncontact Sensors
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Topics: Blades, Vibration, Sensors, Steam turbines
Proceedings Papers

Experimental Investigation of the Grouped Blade Vibration for Steam Turbine by Non-Contact Sensors

Tomomi Nakajima, Kiyoshi Segawa, Hiromichi Kitahara, Akimitsu Seo, Yutaka Yamashita, Takeshi Kudo
Proc. ASME. GT2017, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T29A025, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64047
https://doi.org/10.1115/GT2017-64047
View Paper titled, Experimental Investigation of the Grouped Blade Vibration for Steam Turbine by Non-Contact Sensors
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Topics: Blades, Sensors, Steam turbines, Vibration, Manufacturing, Air jets, Magnification, Materials properties, Pressure, Strain gages
Proceedings Papers

Experimental Study of Torsional-Bending Coupled Vibration of a Rotor System With a Bladed Disk

Takeshi Kudo, Koki Shiohata, Osami Matsushita, Hiroyuki Fujiwara, Akira Okabe, Shigeo Sakurai
Proc. ASME. IDETC-CIE2013, Volume 8: 22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise, V008T13A039, August 4–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: DETC2013-12115
https://doi.org/10.1115/DETC2013-12115
View Paper titled, Experimental Study of Torsional-Bending Coupled Vibration of a Rotor System With a Bladed Disk
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Topics: Disks, Rotors, Vibration, Resonance, Excitation, Torsion, Blades, Servomotors, Steam turbines, Bearings
Proceedings Papers

Nuclear Steam Turbine With 60 inch Last Stage Blade

Motonari Haraguchi, Tateki Nakamura, Hideo Yoda, Takeshi Kudo, Shigeki Senoo
Proc. ASME. ICONE21, Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle and Balance of Plant; Nuclear Fuel and Materials; Radiation Protection and Nuclear Technology Applications, V001T01A042, July 29–August 2, 2013
Publisher: American Society of Mechanical Engineers
Paper No: ICONE21-16600
https://doi.org/10.1115/ICONE21-16600
View Paper titled, Nuclear Steam Turbine With 60 inch Last Stage Blade
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Topics: Blades, Steam turbines, Steam, Water, Boiling water reactors, Countermeasures, Heavy water reactors, Nuclear power, Pressure, Pressurized water reactors
Journal Articles

Experimental Validation of Fretting Fatigue Strength and Fretting Wear Rate at Contact Surface of Turbine-Blade-Shroud Cover

Kunio Asai, Takeshi Kudo, Hideo Yoda
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2014, 136(4): 042101.
Paper No: GTP-12-1410
https://doi.org/10.1115/1.4025833
Published Online: December 10, 2013
View Article titled, Experimental Validation of Fretting Fatigue Strength and Fretting Wear Rate at Contact Surface of Turbine-Blade-Shroud Cover
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Topics: Fatigue, Fatigue strength, Friction, Wear, Stress, Cycles, Blades, Pressure
Proceedings Papers

The Effects of the Tangential Leans for the Last Stage Nozzles of Steam Turbine

Hideki Ono, Shigeki Senoo, Takeshi Kudo, Kenichi Murata
Proc. ASME. GT2013, Volume 5B: Oil and Gas Applications; Steam Turbines, V05BT25A043, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95827
https://doi.org/10.1115/GT2013-95827
View Paper titled, The Effects of the Tangential Leans for the Last Stage Nozzles of Steam Turbine
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Topics: Nozzles, Steam turbines, Blades, Inflow, Computational fluid dynamics, Flow separation, Pressure
Proceedings Papers

Steady and Unsteady Flow Measurements Under Low Load Conditions in a Low Pressure Model Steam Turbine

Kiyoshi Segawa, Shigeki Senoo, Hisashi Hamatake, Takeshi Kudo, Tateki Nakamura, Naoaki Shibashita
Proc. ASME. ICONE20-POWER2012, Volume 3: Thermal-Hydraulics; Turbines, Generators, and Auxiliaries, 833-839, July 30–August 3, 2012
Publisher: American Society of Mechanical Engineers
Paper No: ICONE20-POWER2012-54862
https://doi.org/10.1115/ICONE20-POWER2012-54862
View Paper titled, Steady and Unsteady Flow Measurements Under Low Load Conditions in a Low Pressure Model Steam Turbine
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Topics: Pressure, Steam turbines, Stress, Unsteady flow, Flow (Dynamics), Blades, Fluctuations (Physics), Probes, Pressure measurement, Turbines
Proceedings Papers

Experimental Validation of Fretting Fatigue Strength and Fretting Wear Rate at Contact Surface of Turbine-Blade-Shroud Cover

Kunio Asai, Takeshi Kudo, Hideo Yoda
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 149-156, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68576
https://doi.org/10.1115/GT2012-68576
View Paper titled, Experimental Validation of Fretting Fatigue Strength and Fretting Wear Rate at Contact Surface of Turbine-Blade-Shroud Cover
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Topics: Blades, Fatigue strength, Turbines, Wear, Friction, Pressure, Stress, Cycles, Fatigue, Adhesion
Proceedings Papers

Analysis of Vibration Characteristics for Last Stage Blade With Friction Contact Surfaces of Steam Turbine

Yutaka Yamashita, Koki Shiohata, Takeshi Kudo
Proc. ASME. IMECE2011, Volume 7: Dynamic Systems and Control; Mechatronics and Intelligent Machines, Parts A and B, 405-412, November 11–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2011-63495
https://doi.org/10.1115/IMECE2011-63495
View Paper titled, Analysis of Vibration Characteristics for Last Stage Blade With Friction Contact Surfaces of Steam Turbine
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Topics: Blades, Friction, Steam turbines, Vibration, Damping, Dynamic response, Dampers, Finite element analysis, Frequency response, Modeling
Proceedings Papers

Reduced Modelling for Turbine Rotor-Blade Coupled Bending Vibration Analysis

Akira Okabe, Takeshi Kudo, Koki Shiohata, Osami Matsushita, Hiroyuki Fujiwara, Hideo Yoda, Shigeo Sakurai
Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 355-364, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45776
https://doi.org/10.1115/GT2011-45776
View Paper titled, Reduced Modelling for Turbine Rotor-Blade Coupled Bending Vibration Analysis
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Topics: Blades, Modeling, Rotors, Turbines, Vibration analysis, Vibration, Cantilevers, Design, Displacement, Eigenvalues
Proceedings Papers

A Numerical Method for Turbulent Flows in Highly Staggered and Low Solidity Supersonic Turbine Cascades

Shigeki Senoo, Kazuya Sakakibara, Takeshi Kudo, Naoaki Shibashita
Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 2289-2300, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45450
https://doi.org/10.1115/GT2011-45450
View Paper titled, A Numerical Method for Turbulent Flows in Highly Staggered and Low Solidity Supersonic Turbine Cascades
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Topics: Numerical analysis, Turbines, Turbulence, Flow (Dynamics), Shock waves, Blades, Boundary-value problems, Reflection, Cascades (Fluid dynamics), Compressors
Proceedings Papers

Rotor-Blade Coupled Torsional Vibration Analysis Using Modal Parameters Based on FEM Analyses and Experiments

Akira Okabe, Koki Shiohata, Takeshi Kudo, Hideo Yoda, Shigeo Sakurai, Daiki Nakajima
Proc. ASME. IMECE2010, Volume 13: Sound, Vibration and Design, 139-147, November 12–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2010-37037
https://doi.org/10.1115/IMECE2010-37037
View Paper titled, Rotor-Blade Coupled Torsional Vibration Analysis Using Modal Parameters Based on FEM Analyses and Experiments
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Topics: Blades, Finite element methods, Finite element model, Rotors, Vibration analysis, Disks, Computation, Design, Modeling, Product design
Journal Articles

Reduced Modeling for Turbine Rotor-Blade Coupled Bending Vibration Analysis

Akira Okabe, Takeshi Kudo, Koki Shiohata, Osami Matsushita, Hiroyuki Fujiwara, Hideo Yoda, Shigeo Sakurai
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2012, 134(2): 022502.
https://doi.org/10.1115/1.4004145
Published Online: December 7, 2011
View Article titled, Reduced Modeling for Turbine Rotor-Blade Coupled Bending Vibration Analysis
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Topics: Blades, Vibration, Modeling
Journal Articles

Computations for Unsteady Compressible Flows in a Multistage Steam Turbine With Steam Properties at Low Load Operations

Shigeki Senoo, Kiyoshi Segawa, Hisashi Hamatake, Takeshi Kudo, Tateki Nakamura, Naoaki Shibashita
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2011, 133(10): 103001.
https://doi.org/10.1115/1.4003069
Published Online: May 3, 2011
View Article titled, Computations for Unsteady Compressible Flows in a Multistage Steam Turbine With Steam Properties at Low Load Operations
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Topics: Compressible flow, Flow (Dynamics), Pressure, Steam, Steam turbines, Stress, Unsteady flow, Computation, Blades, Temperature
Proceedings Papers

Computations for Unsteady Compressible Flows in a Multi-Stage Steam Turbine With Steam Properties at Low Load Operations

Shigeki Senoo, Kiyoshi Segawa, Hisashi Hamatake, Takeshi Kudo, Tateki Nakamura, Naoaki Shibashita
Proc. ASME. POWER2010, ASME 2010 Power Conference, 711-722, July 13–15, 2010
Publisher: American Society of Mechanical Engineers
Paper No: POWER2010-27096
https://doi.org/10.1115/POWER2010-27096
View Paper titled, Computations for Unsteady Compressible Flows in a Multi-Stage Steam Turbine With Steam Properties at Low Load Operations
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Topics: Compressible flow, Computation, Steam, Steam turbines, Stress, Flow (Dynamics), Pressure, Blades, Design, Fluids
Proceedings Papers

Evaluation of Friction Damping in Dovetail Root Joints Based on Dissipation Energy on Contact Surfaces

Kunio Asai, Shigeo Sakurai, Takeshi Kudo, Norihiko Ozawa, Taizo Ikeda
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 301-313, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59508
https://doi.org/10.1115/GT2009-59508
View Paper titled, Evaluation of Friction Damping in Dovetail Root Joints Based on Dissipation Energy on Contact Surfaces
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Topics: Damping, Energy dissipation, Friction, Stiffness, Displacement, Gravity (Force), Geometry, Stress, Surface roughness, Turbines
Proceedings Papers

Rotor-Blade Coupled Vibration Analysis by Measuring Modal Parameters of Actual Rotor

Akira Okabe, Takeshi Kudo, Hideo Yoda, Shigeo Sakurai, Osami Matsushita, Koki Shiohata
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 803-812, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59471
https://doi.org/10.1115/GT2009-59471
View Paper titled, Rotor-Blade Coupled Vibration Analysis by Measuring Modal Parameters of Actual Rotor
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Topics: Blades, Rotors, Vibration analysis, Turbogenerators, Springs, Testing, Turbines, Vibration