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Yoshiki Niizeki
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Proceedings Papers

Development of Turbine and Combustor for a Semi-Closed Recuperated Brayton Cycle of Supercritical Carbon Dioxide

Takashi Sasaki, Masao Itoh, Hideyuki Maeda, Junichi Tominaga, Daizo Saito, Yoshiki Niizeki
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, V001T02A008, June 26–30, 2017
Paper No: POWER-ICOPE2017-3419
DOI: https://doi.org/10.1115/POWER-ICOPE2017-3419
View Paper titled, Development of Turbine and Combustor for a Semi-Closed Recuperated Brayton Cycle of Supercritical Carbon Dioxide
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Topics: Brayton cycle, Combustion chambers, Supercritical carbon dioxide, Turbines, Cycles, Carbon dioxide, Combined cycles, Combustion, Design, Fluids
Proceedings Papers

A Study of Radially Curved Mixed-Flow Vaneless Diffusers

Yoshiki Niizeki, Toshimichi Sakai
Proc. ASME. GT1986, Volume 1: Turbomachinery, V001T01A031, June 8–12, 1986
Paper No: 86-GT-89
DOI: https://doi.org/10.1115/86-GT-89
View Paper titled, A Study of Radially Curved Mixed-Flow Vaneless Diffusers
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Topics: Flow (Dynamics), Vaneless diffusers, Diffusers, Pressure gradient
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
View Paper titled, Numerical Investigation of Steam Turbine Exhaust Diffuser Flows and Their Three Dimensional Interaction Effects on Last Stage Efficiencies
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Topics: Diffusers, Exhaust systems, Flow (Dynamics), Steam turbines, Design, Numerical analysis, Pressure, Blades, Design engineering, Energy generation
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
View Paper titled, An Upwind Eulerian-Eulerian Model for Non-Equilibrium Condensation in Steam Turbines
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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
View Paper titled, Aerodynamic Interaction Effects From Upstream and Downstream on the Down-Flow Type Exhaust Diffuser Performance in a Low Pressure Steam Turbine
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Topics: Diffusers, Exhaust systems, Flow (Dynamics), Pressure, Steam turbines, Turbines, Blades, Separation (Technology), Steam, Boundary layers
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
View Paper titled, 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
Click here to open pdf in another window PDF for 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
Topics: Diffusers, Exhaust systems, Flow (Dynamics), Steam, Steam turbines, Turbines, Blades, Evaluation methods, Design, Design engineering
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
View Paper titled, Three Dimensional Optimum Design of a Steam Turbine Stage With NURBS Curves
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Topics: Design, Steam turbines, Shapes, Blades, Optimization, Computational fluid dynamics, Turbine blades, Turbines, Computers, Exhaust systems
Journal Articles

Studies on Unsteady Flow Characteristics in a High Pressure Turbine Cascade Based on a High-Order Large Eddy Simulation Turbulence Model

Tomohiko Jimbo, Debasish Biswas, Yoshiki Niizeki
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. September 2012, 134(5): 051018.
DOI: https://doi.org/10.1115/1.4003974
Published Online: May 11, 2012
View Article titled, Studies on Unsteady Flow Characteristics in a High Pressure Turbine Cascade Based on a High-Order Large Eddy Simulation Turbulence Model
Click here to open pdf in another window PDF for Studies on Unsteady Flow Characteristics in a High Pressure Turbine Cascade Based on a High-Order Large Eddy Simulation Turbulence Model
Topics: Blades, Cascades (Fluid dynamics), Flow (Dynamics), Pressure, Turbulence, Vorticity, Vortices, Turbine blades, Suction, Unsteady flow
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
View Paper titled, Numerical Investigation of Exhaust Diffuser Performances in Low Pressure Turbine Casings
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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 High-Order LES Turbulent Model to Study Unsteady Flow Characteristics in a High Pressure Turbine Cascade

Tomohiko Jimbo, Debasish Biswas, Yasuyuki Yokono, Yoshiki Niizeki
Proc. ASME. GT2008, Volume 6: Turbomachinery, Parts A, B, and C, 2035-2044, June 9–13, 2008
Paper No: GT2008-51458
DOI: https://doi.org/10.1115/GT2008-51458
View Paper titled, A High-Order LES Turbulent Model to Study Unsteady Flow Characteristics in a High Pressure Turbine Cascade
Click here to open pdf in another window PDF for A High-Order LES Turbulent Model to Study Unsteady Flow Characteristics in a High Pressure Turbine Cascade
Topics: Cascades (Fluid dynamics), High pressure (Physics), Turbines, Turbulence, Unsteady flow, Pressure, Vortices, Flow (Dynamics), Blades, Numerical analysis
Proceedings Papers

Influence of Surface Roughness on Turbine Nozzle Profile Loss and Secondary Loss

Hisashi Matsuda, Fumio Otomo, Hiroyuki Kawagishi, Asako Inomata, Yoshiki Niizeki, Takashi Sasaki
Proc. ASME. GT2006, Volume 6: Turbomachinery, Parts A and B, 781-788, May 8–11, 2006
Paper No: GT2006-90828
DOI: https://doi.org/10.1115/GT2006-90828
View Paper titled, Influence of Surface Roughness on Turbine Nozzle Profile Loss and Secondary Loss
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Topics: Nozzles, Surface roughness, Turbines, Flow (Dynamics), Pressure, Probes, Reynolds number, Blasting, Cascades (Fluid dynamics), Milling