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Journal Articles

Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Measured by Transient Technique

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Shimpei Kobayashi, Kento Inokuma, Akira Murata, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. July 2024, 146(7): 072001.
Paper No: HT-23-1454
https://doi.org/10.1115/1.4065117
Published Online: April 17, 2024
View Articletitled, Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Measured by Transient Technique
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Topics: Flow (Dynamics), Heat transfer, Pulsatile flow, Reynolds-averaged Navier–Stokes equations, Transients (Dynamics), Friction, Geometry, Reynolds number, Flow separation
Journal Articles

Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Investigated by Large Eddy Simulation

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Kento Inokuma, Yuki Yawata, Akira Murata, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2024, 146(6): 061801.
Paper No: HT-23-1455
https://doi.org/10.1115/1.4064735
Published Online: March 15, 2024
View Articletitled, Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Investigated by Large Eddy Simulation
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Topics: Flow (Dynamics), Friction, Heat transfer, Large eddy simulation, Pulsatile flow, Geometry, Turbulence
Journal Articles

Pulsating Film-Cooling Flow Over Smooth Cutback Surface at Airfoil Trailing Edge Measured by 2D3C-PTV

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Shohei Yamamoto, Akira Murata, Katsumi Oho, Chihiro Hayakawa, Shumpei Hayakawa, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. September 2021, 143(9): 092101.
Paper No: HT-20-1750
https://doi.org/10.1115/1.4051669
Published Online: July 22, 2021
View Articletitled, Pulsating Film-Cooling Flow Over Smooth Cutback Surface at Airfoil Trailing Edge Measured by 2D3C-PTV
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Topics: Cooling, Film cooling, Flow (Dynamics), Turbulence, Vortices
Journal Articles

Arrangement Effects of 30 deg Inclined Teardrop-Shaped Dimples on Film Cooling Flow Over Dimpled Cutback Surface at Airfoil Trailing Edge Investigated by 2D3C-PTV

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Shohei Yamamoto, Akira Murata, Hiroshi Saito, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. April 2020, 142(4): 042301.
Paper No: HT-19-1472
https://doi.org/10.1115/1.4045752
Published Online: February 20, 2020
View Articletitled, Arrangement Effects of 30 deg Inclined Teardrop-Shaped Dimples on Film Cooling Flow Over Dimpled Cutback Surface at Airfoil Trailing Edge Investigated by 2D3C-PTV
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Topics: Cooling, Film cooling, Flow (Dynamics), Airfoils, Particulate matter, Fluids, Turbulence, Cross section (Physics)
Proceedings Papers

Experimental Study on Drag Reduction Effect With Traveling Wave Control Using PIV Measurement

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Ichiro Suzuki, Takaaki Shimura, Akihiko Mitsuishi, Kaoru Iwamoto, Akira Murata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A002, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4855
https://doi.org/10.1115/AJKFluids2019-4855
View Paper titled, Experimental Study on Drag Reduction Effect With Traveling Wave Control Using PIV Measurement
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Topics: Channel flow, Drag reduction, Traveling waves, Turbulence
Proceedings Papers

Prediction of Drag Reduction Effect of Pulsating Control in Turbulent Pipe Flow by Machine Learning

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Wataru Kobayashi, Takaaki Shimura, Akihiko Mitsuishi, Kaoru Iwamoto, Akira Murata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A011, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5681
https://doi.org/10.1115/AJKFluids2019-5681
View Paper titled, Prediction of Drag Reduction Effect of Pulsating Control in Turbulent Pipe Flow by Machine Learning
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Topics: Drag reduction, Machine learning, Pipe flow, Turbulence
Proceedings Papers

LDV Measurement of Turbulent Pipe Flow With Traveling Wavy Elastic Wall for Drag Reduction

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Seiya Nakazawa, Takaaki Shimura, Akihiko Mitsuishi, Kaoru Iwamoto, Akira Murata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A012, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5691
https://doi.org/10.1115/AJKFluids2019-5691
View Paper titled, LDV Measurement of Turbulent Pipe Flow With Traveling Wavy Elastic Wall for Drag Reduction
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Topics: Drag reduction, Pipe flow, Traveling waves, Turbulence
Proceedings Papers

Water-Mist-Cooled Heat Sink for Autonomous Air-Cooling System (AACS) of More Electric Aircraft (MEA)

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Akira Murata, Hiroshi Saito, Yoji Okita
Proc. ASME. GT2016, Volume 5A: Heat Transfer, V05AT13A006, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56578
https://doi.org/10.1115/GT2016-56578
View Paper titled, Water-Mist-Cooled Heat Sink for Autonomous Air-Cooling System (AACS) of More Electric Aircraft (MEA)
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Topics: Aircraft, Cooling, Heat sinks, Water, Engines, Motors, Control equipment, Electronics, Geometry, Heat
Proceedings Papers

Large Eddy Simulation of Through-Flow Effects on Turbulent Heat Transfer Characteristics in Concentric Annulus With Inner Cylinder Rotation

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Akihiro Ohsawa, Akira Murata, Kaoru Iwamato
Proc. ASME. AJKFluids2015, Volume 1A: Symposia, Part 2, V01AT03A004, July 26–31, 2015
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2015-03135
https://doi.org/10.1115/AJKFluids2015-03135
View Paper titled, Large Eddy Simulation of Through-Flow Effects on Turbulent Heat Transfer Characteristics in Concentric Annulus With Inner Cylinder Rotation
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Topics: Annulus, Cylinders, Flow (Dynamics), Large eddy simulation, Rotation, Turbulent heat transfer, Reynolds number, Exterior walls, Vortices, Deformation
Proceedings Papers

Development of Instrumentation System for Severe Accidents

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Shohei Wada, Akira Murata, Setsuo Arita, Atsushi Fushimi, Hirotsugu Suzuki, Yasutake Fujishima
Proc. ASME. ICONE22, Volume 6: Nuclear Education, Public Acceptance and Related Issues; Instrumentation and Controls (I&C); Fusion Engineering; Beyond Design Basis Events, V006T13A012, July 7–11, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICONE22-30581
https://doi.org/10.1115/ICONE22-30581
View Paper titled, Development of Instrumentation System for Severe Accidents
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Topics: Accidents, Instrumentation, Electricity (Physics), Monitoring systems, Boiling, Boiling water reactors, Fukushima nuclear disaster, Japan, 2011, Light water reactors, Natural resources, Nuclear power stations
Proceedings Papers

Effects of Shape and Arrangement of Dimples on Film Cooling Performance Over Cutback Surface at Airfoil Trailing Edge

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Satomi Nishida, Akira Murata, Hiroshi Saito, Yoji Okita, Chiyuki Nakamata, Kaoru Iwamoto
Proc. ASME. GT2013, Volume 3B: Heat Transfer, V03BT13A054, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95542
https://doi.org/10.1115/GT2013-95542
View Paper titled, Effects of Shape and Arrangement of Dimples on Film Cooling Performance Over Cutback Surface at Airfoil Trailing Edge
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Topics: Airfoils, Film cooling, Shapes, Heat transfer, Cooling, Heat transfer coefficients, Blades, Gas turbines, Heat, Reynolds number
Proceedings Papers

Experimental Study on Drag-Reduction Effect of a New Sinusoidal Riblet

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Monami Sasamori, Kaoru Iwamoto, Akira Murata
Proc. ASME. FEDSM2012, Volume 1: Symposia, Parts A and B, 945-950, July 8–12, 2012
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2012-72437
https://doi.org/10.1115/FEDSM2012-72437
View Paper titled, Experimental Study on Drag-Reduction Effect of a New Sinusoidal Riblet
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Topics: Drag reduction, Turbulence
Journal Articles

Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge

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Akira Murata, Satomi Nishida, Hiroshi Saito, Kaoru Iwamoto, Yoji Okita, Chiyuki Nakamata
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2012, 134(5): 051033.
https://doi.org/10.1115/1.4004828
Published Online: May 31, 2012
View Articletitled, Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge
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Topics: Airfoils, Cooling, Film cooling, Flow (Dynamics), Geometry, Heat transfer coefficients, Transients (Dynamics), Diffusers
Proceedings Papers

Heat Transfer Enhancement due to Combination of Dimples, Protrusions, and Ribs in Narrow Internal Passage of Gas Turbine Blade

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Akira Murata, Satomi Nishida, Hiroshi Saito, Kaoru Iwamoto, Yoji Okita, Chiyuki Nakamata
Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 1173-1182, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45356
https://doi.org/10.1115/GT2011-45356
View Paper titled, Heat Transfer Enhancement due to Combination of Dimples, Protrusions, and Ribs in Narrow Internal Passage of Gas Turbine Blade
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Topics: Blades, Gas turbines, Heat transfer, Cooling, Pressure, Airfoils, Fins, Friction, Reynolds number, Reynolds-averaged Navier–Stokes equations
Proceedings Papers

Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge

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Akira Murata, Satomi Nishida, Hiroshi Saito, Kaoru Iwamoto, Yoji Okita, Chiyuki Nakamata
Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 171-181, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45355
https://doi.org/10.1115/GT2011-45355
View Paper titled, Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge
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Topics: Airfoils, Film cooling, Geometry, Heat transfer coefficients, Heat transfer, Cooling, Diffusers, Flow (Dynamics), Gas turbines, Pressure
Proceedings Papers

Heat and Fluid Flow in Expanding Concentric Annular Flow-Passage With Rotating Inner-Wall

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Akira Murata, Kaoru Iwamoto
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 2, 497-506, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-22403
https://doi.org/10.1115/IHTC14-22403
View Paper titled, Heat and Fluid Flow in Expanding Concentric Annular Flow-Passage With Rotating Inner-Wall
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Topics: Flow (Dynamics), Fluid dynamics, Heat, Centrifugal force, Exterior walls, Finite difference methods, Flow separation, Inflow, Large eddy simulation, Low temperature
Journal Articles

Large Eddy Simulation of Turbulent Heat Transfer in an Orthogonally Rotating Square Duct With Angled Rib Turbulators

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Akira Murata, Associate Professor, Sadanari Mochizuki, Professor Mem. ASME
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Technical Papers
J. Heat Mass Transfer. October 2001, 123(5): 858–867.
https://doi.org/10.1115/1.1389463
Published Online: March 22, 2001
View Articletitled, Large Eddy Simulation of Turbulent Heat Transfer in an Orthogonally Rotating Square Duct With Angled Rib Turbulators
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Topics: Ducts, Flow (Dynamics), Friction, Heat transfer, Rotation, Shear stress, Temperature, Turbulence, Vortices, Large eddy simulation
Journal Articles

Effects of Rib Arrangements on Heat Transfer and Flow Behavior in a Rectangular Rib-Roughened Passage: Application to Cooling of Gas Turbine Blade Trailing Edge

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Robert Kiml, Assistant Professor, Sadanari Mochizuki, Professor, Mem. ASME, Akira Murata, Professor
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Technical Papers
J. Heat Mass Transfer. August 2001, 123(4): 675–681.
https://doi.org/10.1115/1.1378019
Published Online: August 27, 1999
View Articletitled, Effects of Rib Arrangements on Heat Transfer and Flow Behavior in a Rectangular Rib-Roughened Passage: Application to Cooling of Gas Turbine Blade Trailing Edge
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Topics: Cooling, Flow (Dynamics), Flow visualization, Heat transfer, Gas turbines