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Shuichi Umezawa
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Proceedings Papers

The Effect of Partial-Load Operation on a Gas Turbine Compressor of an Advanced Combined Cycle Power Plant

Yasuharu Hagita, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto, Koichi Yonezawa, Shuichi Umezawa, Shuichi Ohmori, Takeshi Suzuki
Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A006, June 13–17, 2022
Paper No: GT2022-80251
https://doi.org/10.1115/GT2022-80251
View Paper titled, The Effect of Partial-Load Operation on a Gas Turbine Compressor of an Advanced Combined Cycle Power Plant
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Topics: Combined cycle power stations, Compressors, Gas turbines, Stress, Unsteady flow
Proceedings Papers

Unsteady Flow Simulation Through Stator-Rotor Blade Rows in Intermediate-Pressure Steam Turbines With Cutback Blades

Hironori Miyazawa, Akihiro Uemura, Takashi Furusawa, Satoru Yamamoto, Koichi Yonezawa, Shuichi Umezawa, Shuichi Ohmori, Takeshi Suzuki
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A018, September 21–25, 2020
Paper No: GT2020-14937
https://doi.org/10.1115/GT2020-14937
View Paper titled, Unsteady Flow Simulation Through Stator-Rotor Blade Rows in Intermediate-Pressure Steam Turbines With Cutback Blades
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Topics: Blades, Pressure, Rotors, Simulation, Stators, Steam turbines, Unsteady flow, Maintenance, Flow (Dynamics), Fracture (Process)
Proceedings Papers

Numerical Study of Influence of Rotor Tip Gap Increase due to Age Deterioration in 3-Stage Gas Turbine

Koichi Yonezawa, Junichi Sakamoto, Kazuyasu Sugiyama, Shuichi Ohmori, Shuichi Umezawa
Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT33A034, September 21–25, 2020
Paper No: GT2020-16270
https://doi.org/10.1115/GT2020-16270
View Paper titled, Numerical Study of Influence of Rotor Tip Gap Increase due to Age Deterioration in 3-Stage Gas Turbine
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Topics: Gas turbines, Rotors, Blades, Clearances (Engineering), Computational fluid dynamics, Simulation, Boundary-value problems, Entropy, Flow (Dynamics), Heat
Proceedings Papers

Effect of Blade Secular Change on Unsteady Flows in Middle Pressure First-Stage Steam Turbines

Akihiro Uemura, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto, Koichi Yonezawa, Shuichi Umezawa
Proc. ASME. GT2019, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, V008T29A015, June 17–21, 2019
Paper No: GT2019-90644
https://doi.org/10.1115/GT2019-90644
View Paper titled, Effect of Blade Secular Change on Unsteady Flows in Middle Pressure First-Stage Steam Turbines
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Topics: Blades, Pressure, Steam turbines, Unsteady flow, Maintenance, Rotors, Stators, Accidents, Boilers, Coal
Proceedings Papers

An Impact Assessment of Erosion of Nozzle Guide Vanes and Rotor Blades on Aerodynamic Performance of a Gas Turbine by CFD

Koichi Yonezawa, Masahiro Takayasu, Genki Nakai, Kazuyasu Sugiyama, Katsuhiko Sugita, Shuichi Umezawa, Shuichi Ohmori
Proc. ASME. GT2019, Volume 2B: Turbomachinery, V02BT40A013, June 17–21, 2019
Paper No: GT2019-90636
https://doi.org/10.1115/GT2019-90636
View Paper titled, An Impact Assessment of Erosion of Nozzle Guide Vanes and Rotor Blades on Aerodynamic Performance of a Gas Turbine by CFD
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Topics: Blades, Computational fluid dynamics, Erosion, Gas turbines, Nozzle guide vanes, Rotors, Nozzles, Cycles, Flow (Dynamics), Heat
Journal Articles

Degradation of Aerodynamic Performance of an Intermediate-Pressure Steam Turbine Due to Erosion of Nozzle Guide Vanes and Rotor Blades

Koichi Yonezawa, Tomoki Kagayama, Masahiro Takayasu, Genki Nakai, Kazuyasu Sugiyama, Katsuhiko Sugita, Shuichi Umezawa
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2019, 141(1): 012602.
Paper No: GTP-17-1646
https://doi.org/10.1115/1.4040566
Published Online: September 14, 2018
View Article titled, Degradation of Aerodynamic Performance of an Intermediate-Pressure Steam Turbine Due to Erosion of Nozzle Guide Vanes and Rotor Blades
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Topics: Blades, Erosion, Nozzle guide vanes, Pressure, Rotors, Steam turbines, Flow (Dynamics), Turbines
Proceedings Papers

Effect of a Transition in a Fuel Species Fraction on the Behavior of a Bunsen-Type Premixed Flame

Takuya Ishibashi, Takuya Tomidokoro, Takashi Suzuki, Shuichi Umezawa, Takeshi Yokomori, Toshihisa Ueda
Proc. ASME. POWER2017-ICOPE-17, Volume 1: Boilers and Heat Recovery Steam Generator; Combustion Turbines; Energy Water Sustainability; Fuels, Combustion and Material Handling; Heat Exchangers, Condensers, Cooling Systems, and Balance-of-Plant, V001T04A039, June 26–30, 2017
Paper No: POWER-ICOPE2017-3459
https://doi.org/10.1115/POWER-ICOPE2017-3459
View Paper titled, Effect of a Transition in a Fuel Species Fraction on the Behavior of a Bunsen-Type Premixed Flame
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Topics: Flames, Fuels, Methane, Diffusion (Physics), Flow (Dynamics), Transients (Dynamics), Video cameras
Proceedings Papers

Spray Properties With Various Spray Nozzles for Cooling Suction Air of Gas Turbine by Means of a Phase Doppler Anemometry

Asuka Takatsuki, Keitaro Motoi, Katsuhiko Sugita, Shuichi Umezawa, Hisanobu Kawasima, Tsuneaki Ishima
Proc. ASME. POWER2017-ICOPE-17, Volume 2: I&C, Digital Controls, and Influence of Human Factors; Plant Construction Issues and Supply Chain Management; Plant Operations, Maintenance, Aging Management, Reliability and Performance; Renewable Energy Systems: Solar, Wind, Hydro and Geothermal; Risk Management, Safety and Cyber Security; Steam Turbine-Generators, Electric Generators, Transformers, Switchgear, and Electric BOP and Auxiliaries; Student Competition; Thermal Hydraulics and Computational Fluid Dynamics, V002T08A013, June 26–30, 2017
Paper No: POWER-ICOPE2017-3417
https://doi.org/10.1115/POWER-ICOPE2017-3417
View Paper titled, Spray Properties With Various Spray Nozzles for Cooling Suction Air of Gas Turbine by Means of a Phase Doppler Anemometry
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Topics: Cooling, Gas turbines, Nozzles, Sprays, Suction, Particulate matter, Drops, Measurement systems, Water
Proceedings Papers

A Numerical Investigation of Aerodynamic Characteristics of a Deteriorated Gas Turbine

Koichi Yonezawa, Genki Nakai, Kazuyasu Sugiyama, Katsuhiko Sugita, Shuichi Umezawa
Proc. ASME. POWER2017-ICOPE-17, Volume 2: I&C, Digital Controls, and Influence of Human Factors; Plant Construction Issues and Supply Chain Management; Plant Operations, Maintenance, Aging Management, Reliability and Performance; Renewable Energy Systems: Solar, Wind, Hydro and Geothermal; Risk Management, Safety and Cyber Security; Steam Turbine-Generators, Electric Generators, Transformers, Switchgear, and Electric BOP and Auxiliaries; Student Competition; Thermal Hydraulics and Computational Fluid Dynamics, V002T08A017, June 26–30, 2017
Paper No: POWER-ICOPE2017-3444
https://doi.org/10.1115/POWER-ICOPE2017-3444
View Paper titled, A Numerical Investigation of Aerodynamic Characteristics of a Deteriorated Gas Turbine
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Topics: Gas turbines, Blades, Rotors, Nozzle guide vanes, Aerodynamics, Computation, Erosion, Flow (Dynamics), Maintenance, Particulate matter
Proceedings Papers

Wet Steam Flowrate Calibration Facility

Masahiro Ishibashi, Tatsuya Funaki, Masaki Takamoto, Shuichi Umezawa, Masayuki Sakai, Haruo Amari, Hiroyuki Shimada, Ryo Morita, Fumio Inada, Yuta Uchiyama
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 2, Fora, 155-160, July 24–29, 2011
Paper No: AJK2011-31026
https://doi.org/10.1115/AJK2011-31026
View Paper titled, Wet Steam Flowrate Calibration Facility
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Topics: Calibration, Steam, Flow (Dynamics), Heat exchangers, Boilers, Cooling, Enthalpy, Flowmeters, Uncertainty analysis
Proceedings Papers

Application Study of Newly Developed Turbo Heat Pump for 130 Degrees Celsius Water for an Industrial Process

Shuichi Umezawa, Haruo Amari, Hiroyuki Shimada, Takashi Matsuhisa, Ryo Fukushima, Kenji Ueda
Proc. ASME. POWER2011, ASME 2011 Power Conference, Volume 2, 379-386, July 12–14, 2011
Paper No: POWER2011-55355
https://doi.org/10.1115/POWER2011-55355
View Paper titled, Application Study of Newly Developed Turbo Heat Pump for 130 Degrees Celsius Water for an Industrial Process
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Topics: Carbon dioxide, Emissions, Heat pumps, Turbochargers, Water
Proceedings Papers

Clarification of Measurement Error of Orifice Flow Meter in Wet Steam Flow

Ryo Morita, Shuichi Umezawa, Tatsuya Funaki, Fumio Inada, Masayuki Sakai, Masahiro Ishibashi, Yuta Uchiyama, Haruo Amari, Masaki Takamoto, Hiroyuki Shimada
Proc. ASME. POWER2011, ASME 2011 Power Conference, Volume 2, 307-313, July 12–14, 2011
Paper No: POWER2011-55457
https://doi.org/10.1115/POWER2011-55457
View Paper titled, Clarification of Measurement Error of Orifice Flow Meter in Wet Steam Flow
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Topics: Errors, Flow (Dynamics), Flowmeters, Steam, Pressure
Proceedings Papers

Diagnosis of Thermal Efficiency of Advanced Combined Cycle Power Plants Using Optical Torque Sensor

Shuichi Umezawa
Proc. ASME. POWER2005, ASME 2005 Power Conference, 1395-1400, April 5–7, 2005
Paper No: PWR2005-50366
https://doi.org/10.1115/PWR2005-50366
View Paper titled, Diagnosis of Thermal Efficiency of Advanced Combined Cycle Power Plants Using Optical Torque Sensor
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Topics: Combined cycle power stations, Sensors, Thermal efficiency, Torque
Proceedings Papers

Diagnosis of Thermal Efficiency of Nuclear Power Plants Using Optical Torque Sensors

Shuichi Umezawa, Jun Adachi
Proc. ASME. ICONE14, Volume 1: Plant Operations, Maintenance and Life Cycle; Component Reliability and Materials Issues; Codes, Standards, Licensing and Regulatory Issues; Fuel Cycle and High Level Waste Management, 59-66, July 17–20, 2006
Paper No: ICONE14-89138
https://doi.org/10.1115/ICONE14-89138
View Paper titled, Diagnosis of Thermal Efficiency of Nuclear Power Plants Using Optical Torque Sensors
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Topics: Nuclear power stations, Sensors, Thermal efficiency, Torque