1-20 of 20
Nobumichi Fujisawa
Close
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Articles

Unsteady Flow Mechanism of Impeller Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Bleed Slots

Available to Purchase
Nobumichi Fujisawa, Yuta Yamamoto, Yutaka Ohta, Atsushi Ogino, Ryo Nakayama, Eijiro Kitamura
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2025, 147(7): 071013.
Paper No: TURBO-24-1248
https://doi.org/10.1115/1.4067178
Published Online: December 17, 2024
View Articletitled, Unsteady Flow Mechanism of Impeller Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Bleed Slots
Open the PDF for Unsteady Flow Mechanism of Impeller Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Bleed Slots in another window
Topics: Blades, Compressors, Flow (Dynamics), Impellers, Pressure, Stall inception, High pressure (Physics), Vortices, Suction
Journal Articles

Unsteady Flow Structure of Rotating Instability in a 1.5-Stage Axial Compressor

Available to Purchase
Nobumichi Fujisawa, Yutaka Ohta, Mai Yamagami, Takashi Goto, Dai Kato
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2025, 147(4): 041010.
Paper No: TURBO-24-1247
https://doi.org/10.1115/1.4066814
Published Online: October 25, 2024
View Articletitled, Unsteady Flow Structure of Rotating Instability in a 1.5-Stage Axial Compressor
Open the PDF for Unsteady Flow Structure of Rotating Instability in a 1.5-Stage Axial Compressor in another window
Topics: Blades, Compressors, Flow (Dynamics), Leakage, Pressure, Rotors, Unsteady flow, Vortices, Clearances (Engineering), Computational fluid dynamics
Proceedings Papers

Unsteady Flow Mechanism of Impeller Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Bleed Slots

Available to Purchase

Nobumichi Fujisawa, Yuta Yamamoto, Yutaka Ohta, Atsushi Ogino, Ryo Nakayama, Eijiro Kitamura
Proc. ASME. GT2024, Volume 12D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V12DT35A023, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128457
https://doi.org/10.1115/GT2024-128457
View Paper titled, Unsteady Flow Mechanism of Impeller Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Bleed Slots
Open the PDF for Unsteady Flow Mechanism of Impeller Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Bleed Slots in another window
Topics: Compressors, High pressure (Physics), Impellers, Stall inception, Unsteady flow
Proceedings Papers

Unsteady Flow Structure of Rotating Instability in a 1.5-Stage Axial Compressor

Available to Purchase

Nobumichi Fujisawa, Yutaka Ohta, Mai Yamagami, Takashi Goto, Dai Kato
Proc. ASME. GT2024, Volume 12D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V12DT36A004, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-122609
https://doi.org/10.1115/GT2024-122609
View Paper titled, Unsteady Flow Structure of Rotating Instability in a 1.5-Stage Axial Compressor
Open the PDF for Unsteady Flow Structure of Rotating Instability in a 1.5-Stage Axial Compressor in another window
Topics: Compressors, Unsteady flow
Journal Articles

Unsteady Pre-Stall Behavior in a Centrifugal Compressor With Vaned Diffuser

Available to Purchase
Yutaro Suzuki, Nobumichi Fujisawa, Yutaka Ohta
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2024, 146(4): 041006.
Paper No: TURBO-23-1255
https://doi.org/10.1115/1.4064136
Published Online: December 15, 2023
View Articletitled, Unsteady Pre-Stall Behavior in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Unsteady Pre-Stall Behavior in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers, Flow (Dynamics), Computational fluid dynamics, Impellers
Proceedings Papers

Diffuser Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Fishtail Pipe Diffuser

Available to Purchase

Atsushi Ogino, Ryo Nakayama, Eijiro Kitamura, Nobumichi Fujisawa, Satoshi Aoyama, Yutaka Ohta
Proc. ASME. GT2023, Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V13DT35A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-100835
https://doi.org/10.1115/GT2023-100835
View Paper titled, Diffuser Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Fishtail Pipe Diffuser
Open the PDF for Diffuser Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Fishtail Pipe Diffuser in another window
Topics: Compressors, Diffusers, High pressure (Physics), Pipes, Stall inception
Proceedings Papers

Unsteady Pre-Stall Behavior in a Centrifugal Compressor With Vaned Diffuser

Available to Purchase

Yutaro Suzuki, Nobumichi Fujisawa, Yutaka Ohta
Proc. ASME. GT2023, Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V13DT36A014, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102425
https://doi.org/10.1115/GT2023-102425
View Paper titled, Unsteady Pre-Stall Behavior in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Unsteady Pre-Stall Behavior in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers
Proceedings Papers

Interaction Mechanism of Impeller and Diffuser Stall in a Centrifugal Compressor

Available to Purchase

Nobumichi Fujisawa, Momoko Naitou, Yutaka Ohta
Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A025, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82861
https://doi.org/10.1115/GT2022-82861
View Paper titled, Interaction Mechanism of Impeller and Diffuser Stall in a Centrifugal Compressor
Open the PDF for Interaction Mechanism of Impeller and Diffuser Stall in a Centrifugal Compressor in another window
Topics: Compressors, Diffusers, Impellers, Vaneless diffusers
Proceedings Papers

Effects of Tip Clearance on Internal Flow and Loss Generation Mechanism in an Axial Compressor at Windmilling Conditions

Available to Purchase

Tomohiro Inada, Ryousuke Sekino, Nobumichi Fujisawa, Yutaka Ohta
Proc. ASME. FEDSM2022, Volume 1: Fluid Applications and Systems (FASTC); Fluid Measurement and Instrumentation (FMITC); Fluid Mechanics (FMTC), V001T01A004, August 3–5, 2022
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2022-86773
https://doi.org/10.1115/FEDSM2022-86773
View Paper titled, Effects of Tip Clearance on Internal Flow and Loss Generation Mechanism in an Axial Compressor at Windmilling Conditions
Open the PDF for Effects of Tip Clearance on Internal Flow and Loss Generation Mechanism in an Axial Compressor at Windmilling Conditions in another window
Topics: Clearances (Engineering), Compressors, Internal flow
Proceedings Papers

Rotating Mechanism of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser

Available to Purchase

Nobumichi Fujisawa, Yuki Agari, Yoshifumi Yamao, Yutaka Ohta
Proc. ASME. GT2021, Volume 2D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V02DT39A010, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59869
https://doi.org/10.1115/GT2021-59869
View Paper titled, Rotating Mechanism of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser
Open the PDF for Rotating Mechanism of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser in another window
Topics: Compressors, Diffusers, Vaneless diffusers
Proceedings Papers

The Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser

Available to Purchase

Hiroshi Miida, Kenta Tajima, Nobumichi Fujisawa, Yutaka Ohta
Proc. ASME. FEDSM2020, Volume 1: Fluid Applications and Systems; Fluid Measurement and Instrumentation, V001T01A006, July 13–15, 2020
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2020-20128
https://doi.org/10.1115/FEDSM2020-20128
View Paper titled, The Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser
Open the PDF for The Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaneless Diffuser in another window
Topics: Compressors, Computational fluid dynamics, Diffusers, Vaneless diffusers
Proceedings Papers

Development of Rotating Stall Cell Under Coexisting Phenomena of Surge and Rotating Stall in an Axial-Flow Compressor

Available to Purchase

Yuu Sakata, Shuji Ando, Nobumichi Fujisawa, Yutaka Ohta
Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A024, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5310
https://doi.org/10.1115/AJKFluids2019-5310
View Paper titled, Development of Rotating Stall Cell Under Coexisting Phenomena of Surge and Rotating Stall in an Axial-Flow Compressor
Open the PDF for Development of Rotating Stall Cell Under Coexisting Phenomena of Surge and Rotating Stall in an Axial-Flow Compressor in another window
Topics: Axial flow, Compressors, Surges
Proceedings Papers

Transient Analysis of Rotating Stall Development in a Centrifugal Compressor With Vaned Diffuser

Available to Purchase

Nobumichi Fujisawa, Masaki Takahashi, Yutaka Ohta
Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT45A010, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-90797
https://doi.org/10.1115/GT2019-90797
View Paper titled, Transient Analysis of Rotating Stall Development in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Transient Analysis of Rotating Stall Development in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers, Transient analysis, Impellers, Transients (Dynamics), Separation (Technology), Vortices, Computational fluid dynamics, Numerical analysis, Pressure
Journal Articles

Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Available to Purchase
Nobumichi Fujisawa, Tetsuya Inui, Yutaka Ohta
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. April 2019, 141(4): 041009.
Paper No: TURBO-18-1289
https://doi.org/10.1115/1.4042249
Published Online: January 21, 2019
View Articletitled, Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers, Flow (Dynamics), Impellers, Pressure, Pressure measurement
Proceedings Papers

Interaction Between Surge Behavior and Internal Flow Field in an Axial-Flow Compressor

Available to Purchase

Yuu Sakata, Nobumichi Fujisawa, Yutaka Ohta
Proc. ASME. FEDSM2018, Volume 3: Fluid Machinery; Erosion, Slurry, Sedimentation; Experimental, Multiscale, and Numerical Methods for Multiphase Flows; Gas-Liquid, Gas-Solid, and Liquid-Solid Flows; Performance of Multiphase Flow Systems; Micro/Nano-Fluidics, V003T12A016, July 15–20, 2018
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2018-83172
https://doi.org/10.1115/FEDSM2018-83172
View Paper titled, Interaction Between Surge Behavior and Internal Flow Field in an Axial-Flow Compressor
Open the PDF for Interaction Between Surge Behavior and Internal Flow Field in an Axial-Flow Compressor in another window
Topics: Axial flow, Compressors, Internal flow, Surges, Flow (Dynamics), Pressure, Cycles, Pressure gradient, Pressure measurement, Stall inception
Proceedings Papers

Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Free

Nobumichi Fujisawa, Tetsuya Inui, Yutaka Ohta
Proc. ASME. GT2018, Volume 2A: Turbomachinery, V02AT45A008, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75462
https://doi.org/10.1115/GT2018-75462
View Paper titled, Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Evolution Process of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers, Impellers, Computational fluid dynamics, Boundary layers, Flow (Dynamics), Numerical analysis, Pressure, Pressure measurement, Separation (Technology)
Proceedings Papers

Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser

Available to Purchase

Nobumichi Fujisawa, Daiki Ema, Yutaka Ohta
Proc. ASME. GT2017, Volume 2D: Turbomachinery, V02DT46A005, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63400
https://doi.org/10.1115/GT2017-63400
View Paper titled, Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Unsteady Behavior of Diffuser Stall in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers, Vortices, Flow (Dynamics), Suction, Corners (Structural elements), Impellers, Numerical analysis, Pressure measurement
Proceedings Papers

Structure of Diffuser Stall and Unsteady Vortices in a Centrifugal Compressor With Vaned Diffuser

Available to Purchase

Nobumichi Fujisawa, Sota Ikezu, Yutaka Ohta
Proc. ASME. GT2016, Volume 2D: Turbomachinery, V02DT44A002, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56154
https://doi.org/10.1115/GT2016-56154
View Paper titled, Structure of Diffuser Stall and Unsteady Vortices in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Structure of Diffuser Stall and Unsteady Vortices in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers, Vortices, Flow (Dynamics), Impellers, Design, Leakage, Numerical analysis
Proceedings Papers

Unsteady Behavior of Leading Edge Vortex and Diffuser Stall Inception in a Centrifugal Compressor With Vaned Diffuser

Available to Purchase

Nobumichi Fujisawa, Shotaro Hara, Yutaka Ohta, Takashi Goto
Proc. ASME. FEDSM2014, Volume 1B, Symposia: Fluid Machinery; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows, V01BT10A015, August 3–7, 2014
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2014-21242
https://doi.org/10.1115/FEDSM2014-21242
View Paper titled, Unsteady Behavior of Leading Edge Vortex and Diffuser Stall Inception in a Centrifugal Compressor With Vaned Diffuser
Open the PDF for Unsteady Behavior of Leading Edge Vortex and Diffuser Stall Inception in a Centrifugal Compressor With Vaned Diffuser in another window
Topics: Compressors, Diffusers, Stall inception, Vortices, Flow (Dynamics), Computational fluid dynamics, Design, Impellers, Numerical analysis, Separation (Technology)
Proceedings Papers

Effects of Diffuser Vane Geometries on Compressor Performance and Noise Characteristics in a Centrifugal Compressor

Available to Purchase

Yohei Morita, Nobumichi Fujisawa, Takashi Goto, Yutaka Ohta
Proc. ASME. FEDSM2013, Volume 1B, Symposia: Fluid Machinery; Fluid Power; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Fundamental Issues and Perspectives in Fluid Mechanics, V01BT10A011, July 7–11, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2013-16145
https://doi.org/10.1115/FEDSM2013-16145
View Paper titled, Effects of Diffuser Vane Geometries on Compressor Performance and Noise Characteristics in a Centrifugal Compressor
Open the PDF for Effects of Diffuser Vane Geometries on Compressor Performance and Noise Characteristics in a Centrifugal Compressor in another window
Topics: Compressors, Diffusers, Noise (Sound), Vortices