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Proceedings Papers

Numerical Simulations and Data Analyses to Identify Aerodynamic Noise Sources Emitted From Small Axial Fan

Wataru Obayashi, Hikaru Aono, Tomoaki Tatsukawa, Kozo Fujii, Koichi Takeda, Kazutoshi Takemi, Naoya Murakami
Proc. ASME. FEDSM2021, Volume 3: Fluid Mechanics; Micro and Nano Fluid Dynamics; Multiphase Flow, V003T05A019, August 10–12, 2021
Paper No: FEDSM2021-65995
DOI: https://doi.org/10.1115/FEDSM2021-65995
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Topics: Aerodynamic noise, Computer simulation, Large eddy simulation, Motors, Principal component analysis
Proceedings Papers

Analysis of Aeroacoustic Generated From a Rotating Tire With a Longitudinal Groove Using Large-Eddy Simulation

Kengo Asada, Kimie Ito, Satoshi Sekimoto, Kozo Fujii, Masataka Koishi, Toshiyuki Ikeda
Proc. ASME. FEDSM2021, Volume 1: Aerospace Engineering Division Joint Track; Computational Fluid Dynamics, V001T02A016, August 10–12, 2021
Paper No: FEDSM2021-66009
DOI: https://doi.org/10.1115/FEDSM2021-66009
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Topics: Large eddy simulation, Tires, Flow (Dynamics), Noise (Sound), Shapes, Acoustics, Filters, Principal component analysis, Sound pressure, Symmetry (Physics)
Proceedings Papers

Some Consideration on the Aerodynamic Design of Blast Wave Simulator Using a Shock Tube System

Suguru Kushida, Kengo Asada, Kozo Fujii, Tomoaki Tatsukawa, Kazuyuki Sakamoto
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A051, July 28–August 1, 2019
Paper No: AJKFluids2019-5133
DOI: https://doi.org/10.1115/AJKFluids2019-5133
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Topics: Design, Jets, Shock tubes, Waves
Proceedings Papers

Experimental Investigation for the Better Control of Flows Over a Simplified Vehicle Configuration With Dielectric Barrier Discharge Plasma Actuator

Satoshi Sekimoto, Keigo Shimizu, Takuji Nakashima, Kozo Fujii, Takenori Hiraoka, Takahide Nouzawa
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A005, July 28–August 1, 2019
Paper No: AJKFluids2019-5121
DOI: https://doi.org/10.1115/AJKFluids2019-5121
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Topics: Actuators, Drag reduction, Flow (Dynamics), Flow control, Plasmas (Ionized gases), Vehicles
Proceedings Papers

Evaluations of Shape Parameter of Groove for Reducing Noise Generated From Rotating Tires

Junya Ishiyama, Kozo Fujii, Kengo Asada, Satoshi Sekimoto, Masataka Koishi, Toshiyuki Ikeda
Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A004, July 28–August 1, 2019
Paper No: AJKFluids2019-5138
DOI: https://doi.org/10.1115/AJKFluids2019-5138
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Topics: Acoustics, Noise (Sound), Shapes, Tires
Proceedings Papers

Experimental Analysis of Closed-Loop Flow Control Around Airfoil Using DBD Plasma Actuator

Satoshi Shimomura, Takuto Ogawa, Satoshi Sekimoto, Taku Nonomura, Akira Oyama, Kozo Fujii, Hiroyuki Nishida
Proc. ASME. FEDSM2017, Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Gas and Liquid-Solid Two-Phase Flows; Numerical Methods for Multiphase Flow; Turbulent Flows: Issues and Perspectives; Flow Applications in Aerospace; Fluid Power; Bio-Inspired Fluid Mechanics; Flow Manipulation and Active Control; Fundamental Issues and Perspectives in Fluid Mechanics; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes, V01CT22A004, July 30–August 3, 2017
Paper No: FEDSM2017-69246
DOI: https://doi.org/10.1115/FEDSM2017-69246
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Topics: Actuators, Airfoils, Experimental analysis, Flow control, Plasmas (Ionized gases), Pressure, Chords (Trusses), Flow (Dynamics), Flow separation, Reynolds number
Proceedings Papers

Data Mining of Experimental Data on Separation Control of the Flows Over NACA0015 and Ishii Airfoils Using Dielectric Barrier Discharge Plasma Actuator

Kengo Asada, Satoshi Sekimoto, Tomoaki Tatsukawa, Tomoyasu Shimizu, Masaya Yabu, Kozo Fujii
Proc. ASME. FEDSM2017, Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Gas and Liquid-Solid Two-Phase Flows; Numerical Methods for Multiphase Flow; Turbulent Flows: Issues and Perspectives; Flow Applications in Aerospace; Fluid Power; Bio-Inspired Fluid Mechanics; Flow Manipulation and Active Control; Fundamental Issues and Perspectives in Fluid Mechanics; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes, V01CT22A002, July 30–August 3, 2017
Paper No: FEDSM2017-69060
DOI: https://doi.org/10.1115/FEDSM2017-69060
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Topics: Actuators, Airfoils, Data mining, Flow (Dynamics), Plasmas (Ionized gases), Separation (Technology), Pressure, Reynolds number, Scanning probe microscopy, Drag (Fluid dynamics)
Proceedings Papers

Experimental Study of Separation Control Over a Wide Range of Reynolds Numbers Using Dielectric Barrier Discharge Plasma Actuator on Airfoil

Satoshi Sekimoto, Kozo Fujii, Masayuki Anyoji, Yuma Miyakawa, Shinichiro Ito, Satoshi Shimomura, Hiroyuki Nishida, Taku Nonomura, Takashi Matsuno
Proc. ASME. FEDSM2017, Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Gas and Liquid-Solid Two-Phase Flows; Numerical Methods for Multiphase Flow; Turbulent Flows: Issues and Perspectives; Flow Applications in Aerospace; Fluid Power; Bio-Inspired Fluid Mechanics; Flow Manipulation and Active Control; Fundamental Issues and Perspectives in Fluid Mechanics; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes, V01CT22A003, July 30–August 3, 2017
Paper No: FEDSM2017-69226
DOI: https://doi.org/10.1115/FEDSM2017-69226
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Topics: Actuators, Airfoils, Plasmas (Ionized gases), Reynolds number, Separation (Technology), Chords (Trusses), Cycles, Flow (Dynamics), Pressure measurement, Wings
Proceedings Papers

Validation of Numerical Analysis to Estimate Airfoil Aerodynamic Characteristics at Low Reynolds Number Region

Donghwi Lee, Taku Nonomura, Akira Oyama, Kozo Fujii
Proc. ASME. AJKFluids2015, Volume 1A: Symposia, Part 2, V01AT13A005, July 26–31, 2015
Paper No: AJKFluids2015-13489
DOI: https://doi.org/10.1115/AJKFluids2015-13489
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Topics: Airfoils, Numerical analysis, Reynolds number, Separation (Technology), Reynolds-averaged Navier–Stokes equations, Shapes, Simulation, Geometry, Large eddy simulation, Navier-Stokes equations
Proceedings Papers

Relation Between Sound Sources and Vortical Structures in Isotropic Compressible Turbulence

Daiki Terakado, Taku Nonomura, Makoto Sato, Kozo Fujii
Proc. ASME. IMECE2014, Volume 7: Fluids Engineering Systems and Technologies, V007T09A023, November 14–20, 2014
Paper No: IMECE2014-37052
DOI: https://doi.org/10.1115/IMECE2014-37052
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Topics: Turbulence, Eddies (Fluid dynamics), Mach number, Flow (Dynamics), Computer simulation, Stress, Supersonic flow
Proceedings Papers

DBD Plasma Actuator Multi-Objective Design Optimization at Reynolds Number 63,000: Baseline Case

Taufik Sulaiman, Satoshi Sekimoto, Tomoaki Tatsukawa, Taku Nonomura, Akira Oyama, Kozo Fujii
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, V01BT15A007, July 7–11, 2013
Paper No: FEDSM2013-16325
DOI: https://doi.org/10.1115/FEDSM2013-16325
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Topics: Actuators, Design, Optimization, Plasmas (Ionized gases), Reynolds number, Algorithms, Airfoils, Electromagnetic scattering, Energy consumption, Flow control
Proceedings Papers

Large-Eddy Simulations of Owl-Like Wing Under Low Reynolds Number Conditions

Katsutoshi Kondo, Hikaru Aono, Taku Nonomura, Akira Oyama, Kozo Fujii, Makoto Yamamoto
Proc. ASME. FEDSM2013, Volume 1A, Symposia: Advances in Fluids Engineering Education; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Applications in CFD; Bio-Inspired Fluid Mechanics; CFD Verification and Validation; Development and Applications of Immersed Boundary Methods; DNS, LES, and Hybrid RANS/LES Methods, V01AT04A004, July 7–11, 2013
Paper No: FEDSM2013-16377
DOI: https://doi.org/10.1115/FEDSM2013-16377
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Topics: Large eddy simulation, Reynolds number, Wings, Flow (Dynamics), Separation (Technology), Drag (Fluid dynamics), Bubbles, Pressure, Suction, Airfoils
Proceedings Papers

Plasma Flow Control Simulation of an Airfoil of Wind Turbine at an Intermediate Reynolds Number

Hikaru Aono, Taku Nonomura, Aiko Yakeno, Kozo Fujii, Koichi Okada
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, V01BT15A008, July 7–11, 2013
Paper No: FEDSM2013-16327
DOI: https://doi.org/10.1115/FEDSM2013-16327
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Topics: Airfoils, Flow control, Plasmas (Ionized gases), Reynolds number, Simulation, Wind turbines, Actuators, Separation (Technology), Flow (Dynamics), Shear (Mechanics)
Proceedings Papers

Aerodynamic Design Exploration for Reusable Launch Vehicle Using Multi-Objective Genetic Programming

Tomoaki Tatsukawa, Taku Nonomura, Akira Oyama, Kozo Fujii
Proc. ASME. IDETC-CIE2011, Volume 2: 31st Computers and Information in Engineering Conference, Parts A and B, 213-223, August 28–31, 2011
Paper No: DETC2011-48154
DOI: https://doi.org/10.1115/DETC2011-48154
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Topics: Computer programming, Design, Vehicles, Drag (Fluid dynamics), Shapes, Composite materials, Geometry, Optimization
Proceedings Papers

Computational Study of Flow Characteristics of Thick and Thin Airfoil With Implicit Large-Eddy Simulation at Low Reynolds Number

Ryoji Kojima, Taku Nonomura, Akira Oyama, Kozo Fujii
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3485-3495, July 24–29, 2011
Paper No: AJK2011-15026
DOI: https://doi.org/10.1115/AJK2011-15026
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Topics: Airfoils, Flow (Dynamics), Large eddy simulation, Reynolds number, Bubbles, Separation (Technology), Computation
Proceedings Papers

Computational Study of Aerodynamic Characteristics of an Airfoil With DBD Plasma Actuator

Kengo Asada, Kozo Fujii
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3497-3505, July 24–29, 2011
Paper No: AJK2011-15027
DOI: https://doi.org/10.1115/AJK2011-15027
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Topics: Actuators, Airfoils, Plasmas (Ionized gases), Separation (Technology), Flow (Dynamics), Large eddy simulation, Pressure, Shear (Mechanics), Vortex shedding, Vortices
Proceedings Papers

Experimental Study of Blowing Direction Effects of DBD Plasma Actuator on Separation Control of Flow Around an Airfoil

Taku Nonomura, Satoshi Sekimoto, Kengo Asada, Akira Oyama, Kozo Fujii
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3407-3412, July 24–29, 2011
Paper No: AJK2011-15010
DOI: https://doi.org/10.1115/AJK2011-15010
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Topics: Actuators, Airfoils, Flow (Dynamics), Plasmas (Ionized gases), Separation (Technology), Boundary layers, Momentum, Chords (Trusses), Pressure, Reynolds number
Proceedings Papers

Three-Dimensional Wing Design Towards the Future Mars Airplane

Ryoji Kojima, Donghi Lee, Tomoaki Tatsukawa, Taku Nonomura, Akira Oyama, Kozo Fujii
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3413-3420, July 24–29, 2011
Paper No: AJK2011-15013
DOI: https://doi.org/10.1115/AJK2011-15013
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Topics: Aircraft, Design, Wings, Reynolds number, Drag (Fluid dynamics), Tradeoffs
Proceedings Papers

Computational Study of the Synthetic Jet on Separated Flow Over a Backward-Facing Step

Koichi Okada, Kozo Fujii, Koji Miyaji, Akira Oyama, Taku Nonomura, Kengo Asada
Proc. ASME. IMECE2010, Volume 7: Fluid Flow, Heat Transfer and Thermal Systems, Parts A and B, 161-170, November 12–18, 2010
Paper No: IMECE2010-38767
DOI: https://doi.org/10.1115/IMECE2010-38767
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Topics: Flow (Dynamics), Shear (Mechanics), Vortices, Separation (Technology), Stress, Computation, Large eddy simulation, Navier-Stokes equations, Numerical analysis
Proceedings Papers

Computational Study of Frequency and Amplitude Effects on Separation Flow Control With the Synthetic Jet

Koichi Okada, Kozo Fujii, Koji Miyaji
Proc. ASME. IMECE2009, Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C, 289-298, November 13–19, 2009
Paper No: IMECE2009-11218
DOI: https://doi.org/10.1115/IMECE2009-11218
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Topics: Flow control, Separation (Technology), Shear (Mechanics), Vortices, Flow (Dynamics), Stress, Computation, Computer simulation, Large eddy simulation, Navier-Stokes equations