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Journal Articles

Effect of a Ceramic Matrix Composite Surface on Film Cooling

Peter H. Wilkins, Stephen P. Lynch, Karen A. Thole, Tyler Vincent, San Quach, Dominic Mongillo
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. August 2022, 144(8): 081014.
Paper No: TURBO-21-1222
DOI: https://doi.org/10.1115/1.4053842
Published Online: March 4, 2022
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Topics: Ceramic matrix composites, Computational fluid dynamics, Film cooling, Flow (Dynamics), Heat transfer, Temperature, Reynolds-averaged Navier–Stokes equations, Surface roughness, Coolants
Journal Articles

Calibration of a Computational Fluid Dynamics Methodology for the Simulation of Roughness Effects on Friction and Heat Transfer in Additive Manufactured Components

Lorenzo Mazzei, Riccardo Da Soghe, Cosimo Bianchini
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. August 2022, 144(8): 081002.
Paper No: TURBO-21-1242
DOI: https://doi.org/10.1115/1.4053493
Published Online: March 3, 2022
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Topics: Computational fluid dynamics, Friction, Heat transfer, Surface roughness, Calibration, Additive manufacturing, Simulation
Journal Articles

Erratum: “Scaling Roughness Effects on Pressure Loss and Heat Transfer of Additively Manufactured Channels” [J. Turbomach. 139(2), p. 021003; DOI: 10.1115/1.4034555 ]

Curtis K. Stimpson, Jacob C. Snyder, Karen A. Thole, Dominic Mongillo
Journal: Journal of Turbomachinery
Article Type: Errata
J. Turbomach. April 2022, 144(4): 047001.
Paper No: TURBO-18-1242
DOI: https://doi.org/10.1115/1.4042129
Published Online: February 17, 2022
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Topics: Additive manufacturing, Heat transfer, Pressure, Surface roughness
Journal Articles

Efficiency Scaling: Influence of Reynolds and Mach Numbers on Fan Performance

Peter F. Pelz, Sebastian Saul, Johannes Brötz
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. June 2022, 144(6): 061001.
Paper No: TURBO-20-1106
DOI: https://doi.org/10.1115/1.4053172
Published Online: January 28, 2022
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Topics: Fans, Flow (Dynamics), Friction, Mach number, Pressure, Reynolds number, Machinery, Impellers, Surface roughness
Journal Articles

Convection in Scaled Turbine Internal Cooling Passages With Additive Manufacturing Roughness

Gabriel J. Stafford, Stephen T. McClain, David R. Hanson, Robert F. Kunz, Karen A. Thole
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. April 2022, 144(4): 041008.
Paper No: TURBO-21-1182
DOI: https://doi.org/10.1115/1.4052524
Published Online: November 10, 2021
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Topics: Convection, Friction, Heat transfer, Surface roughness, Aluminum, Additive manufacturing, Cooling
Journal Articles

The Influence of Deterministic Surface Roughness and Freestream Turbulence on Transitional Boundary Layers: Heat Transfer Distributions and a New Transition Onset Correlation

Christoph Gramespacher, Matthias Stripf, Hans-Jörg Bauer
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. April 2022, 144(4): 041001.
Paper No: TURBO-21-1127
DOI: https://doi.org/10.1115/1.4052458
Published Online: November 2, 2021
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Topics: Boundary layers, Heat transfer, Surface roughness, Turbulence, Reynolds number, Pressure, Suction
Journal Articles

Surface Roughness Impact on Boundary Layer Transition and Loss Mechanisms Over a Flat-Plate Under a Low-Pressure Turbine Pressure Gradient

Heechan Jeong, Seung Jin Song
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011005.
Paper No: TURBO-20-1298
DOI: https://doi.org/10.1115/1.4051937
Published Online: September 7, 2021
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Topics: Boundary layers, Surface roughness, Momentum, Turbulence, Shear stress, Turbines
Journal Articles

Investigating Gas Turbine Internal Cooling Using Supercritical CO 2 at Higher Reynolds Numbers for Direct Fired Cycle Applications

Matthew Searle, Arnab Roy, James Black, Douglas Straub, Sridharan Ramesh
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011007.
Paper No: TURBO-21-1148
DOI: https://doi.org/10.1115/1.4052138
Published Online: September 7, 2021
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Topics: Cooling, Flow (Dynamics), Friction, Gas turbines, Heat transfer, Reynolds number, Surface roughness, Computational fluid dynamics, Supercritical carbon dioxide, Uncertainty
Journal Articles

The Impact of Various Modeling Decisions on Flow Field Predictions in a Centrifugal Compressor

William J. Gooding, Matthew A. Meier, Nicole L. Key
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. October 2021, 143(10): 101006.
Paper No: TURBO-20-1390
DOI: https://doi.org/10.1115/1.4050674
Published Online: May 17, 2021
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Topics: Compressors, Diffusers, Flow (Dynamics), Heat transfer, Modeling, Pressure, Surface roughness, Turbulence, Simulation, Design
Journal Articles

The Influence of Element Thermal Conductivity, Shape, and Density on Heat Transfer in a Rough Wall Turbulent Boundary Layer With Strong Pressure Gradients

Christoph Gramespacher, Holger Albiez, Matthias Stripf, Hans-Jörg Bauer
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. August 2021, 143(8): 081001.
Paper No: TURBO-20-1306
DOI: https://doi.org/10.1115/1.4050390
Published Online: April 21, 2021
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Topics: Heat transfer, Surface roughness, Thermal conductivity, Turbulence, Density
Journal Articles

Flow in a Simulated Turbine Blade Cooling Channel With Spatially Varying Roughness Caused by Additive Manufacturing Orientation

Stephen T. McClain, David R. Hanson, Emily Cinnamon, Jacob C. Snyder, Robert F. Kunz, Karen A. Thole
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2021, 143(7): 071013.
Paper No: TURBO-20-1292
DOI: https://doi.org/10.1115/1.4050389
Published Online: April 19, 2021
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Topics: Surface roughness, Flow (Dynamics), Friction
Journal Articles

Impact of Additive Manufacturing on Internal Cooling Channels With Varying Diameters and Build Directions

Alexander J. Wildgoose, Karen A. Thole, Paul Sanders, Lieke Wang
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2021, 143(7): 071003.
Paper No: TURBO-20-1283
DOI: https://doi.org/10.1115/1.4050336
Published Online: April 8, 2021
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Topics: Additive manufacturing, Cooling, Design, Friction, Heat transfer, Pressure, Shapes, Surface roughness, Reynolds number
Journal Articles

Effect of Surface Roughness and Inlet Turbulence Intensity on a Turbine Nozzle Guide Vane External Heat Transfer: Experimental Investigation on a Literature Test Case

Tommaso Bacci, Alessio Picchi, Tommaso Lenzi, Bruno Facchini, Luca Innocenti
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. April 2021, 143(4): 041006.
Paper No: TURBO-20-1239
DOI: https://doi.org/10.1115/1.4049917
Published Online: March 22, 2021
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Topics: Heat transfer, Heat transfer coefficients, Nozzle guide vanes, Surface roughness, Temperature, Turbines, Turbulence, Pressure, Computational fluid dynamics, Geometry
Journal Articles

Tailoring Surface Roughness Using Additive Manufacturing to Improve Internal Cooling

Jacob C. Snyder, Karen A. Thole
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. July 2020, 142(7): 071004.
Paper No: TURBO-19-1058
DOI: https://doi.org/10.1115/1.4047380
Published Online: June 30, 2020
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Topics: Cooling, Friction, Heat transfer, Surface roughness, Additive manufacturing, Geometry
Journal Articles

Effect of Additive Manufacturing Process Parameters on Turbine Cooling

Jacob C. Snyder, Karen A. Thole
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. May 2020, 142(5): 051007.
Paper No: TURBO-19-1276
DOI: https://doi.org/10.1115/1.4046459
Published Online: April 30, 2020
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Topics: Cooling, Film cooling, Surface roughness, Turbines
Journal Articles

Effects of Coolant Feed Direction on Additively Manufactured Film Cooling Holes

Curtis K. Stimpson, Jacob C. Snyder, Karen A. Thole, Dominic Mongillo
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. November 2018, 140(11): 111001.
Paper No: TURBO-18-1191
DOI: https://doi.org/10.1115/1.4041374
Published Online: October 8, 2018
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Topics: Coolants, Film cooling, Flow (Dynamics), Surface roughness, Additive manufacturing, Cooling, Discharge coefficient
Journal Articles

Numerical Optimization, Characterization, and Experimental Investigation of Additively Manufactured Communicating Microchannels

Kathryn L. Kirsch, Karen A. Thole
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. November 2018, 140(11): 111003.
Paper No: TURBO-18-1205
DOI: https://doi.org/10.1115/1.4041494
Published Online: October 8, 2018
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Topics: Design, Flow (Dynamics), Friction, Heat transfer, Microchannels, Pressure, Reynolds number, Shapes, Surface roughness, Fluids
Journal Articles

Effects of Geometry, Spacing, and Number of Pin Fins in Additively Manufactured Microchannel Pin Fin Arrays

Katharine K. Ferster, Kathryn L. Kirsch, Karen A. Thole
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. January 2018, 140(1): 011007.
Paper No: TURBO-17-1138
DOI: https://doi.org/10.1115/1.4038179
Published Online: October 31, 2017
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Topics: Fins, Flow (Dynamics), Friction, Geometry, Heat transfer, Pins (Engineering), Pressure, Microchannels, Reynolds number, Additive manufacturing
Journal Articles

Effectiveness Measurements of Additively Manufactured Film Cooling Holes

Curtis K. Stimpson, Jacob C. Snyder, Karen A. Thole, Dominic Mongillo
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. January 2018, 140(1): 011009.
Paper No: TURBO-17-1163
DOI: https://doi.org/10.1115/1.4038182
Published Online: October 31, 2017
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Topics: Cooling, Electrical discharge machining, Film cooling, Flow (Dynamics), Surface roughness, Additive manufacturing, Manufacturing, Heat transfer, Coolants, Design
Journal Articles

Modeling of Laminar-Turbulent Transition in Boundary Layers and Rough Turbine Blades

Liang Wei, Xuan Ge, Jacob George, Paul Durbin
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. November 2017, 139(11): 111009.
Paper No: TURBO-16-1283
DOI: https://doi.org/10.1115/1.4037670
Published Online: September 6, 2017
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Topics: Boundary layers, Surface roughness, Turbine blades, Turbulence, Pressure gradient, Flow (Dynamics), Flat plates, Skin friction (Fluid dynamics)