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Proceedings Papers

Influence of Surface Roughness on the Flat-Plate Boundary Layer Transition Under a High-Lift Airfoil Pressure Gradient and Low Freestream Turbulence

Heechan Jeong, Seung Jin Song
Proc. ASME. GT2021, Volume 2B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V02BT32A006, June 7–11, 2021
Paper No: GT2021-59192
DOI: https://doi.org/10.1115/GT2021-59192
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Topics: Airfoils, Boundary layers, Bubbles, Flat plates, Pressure gradient, Separation (Technology), Surface roughness, Turbulence
Proceedings Papers

Influence of Roughness on the Transition Modeling in Compressor Flows

Vera Tolksdorf, Anubhav Gokhale, Daniel Kessler, Leroy Benjamin, Christoph Bode, Jens Friedrichs
Proc. ASME. GT2021, Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V02CT34A039, June 7–11, 2021
Paper No: GT2021-60003
DOI: https://doi.org/10.1115/GT2021-60003
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Topics: Compressors, Flow (Dynamics), Modeling, Surface roughness, Engines, Turbulence, Boundary layers, Reynolds-averaged Navier–Stokes equations, Rotors, Airfoils
Proceedings Papers

Comparison Study on Stage Performance of Centrifugal Compressors With Shrouded and Unshrouded Impellers

Guang Xi, Chenxi Zhao, Yonghong Tang, Zhiheng Wang
Proc. ASME. GT2021, Volume 2D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V02DT37A013, June 7–11, 2021
Paper No: GT2021-59902
DOI: https://doi.org/10.1115/GT2021-59902
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Topics: Compressors, Impellers, Blades, Clearances (Engineering), Design, Geometry, Centrifugal force, Computational fluid dynamics, Flow (Dynamics), Leakage
Proceedings Papers

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

Matthew Searle, Arnab Roy, James Black, Doug Straub, Sridharan Ramesh
Proc. ASME. GT2021, Volume 10: Supercritical CO2, V010T30A020, June 7–11, 2021
Paper No: GT2021-59630
DOI: https://doi.org/10.1115/GT2021-59630
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Topics: Cooling, Cycles, Gas turbines, Reynolds number, Supercritical carbon dioxide, Additive manufacturing, Computational fluid dynamics, Heat transfer, Channel flow, Coolants
Proceedings Papers

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
Proc. ASME. GT2021, Volume 5B: Heat Transfer — General Interest; Internal Air Systems; Internal Cooling, V05BT15A018, June 7–11, 2021
Paper No: GT2021-59684
DOI: https://doi.org/10.1115/GT2021-59684
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Topics: Additive manufacturing, Convection, Cooling, Surface roughness, Turbines, Aluminum, Friction, Compressibility, Computer numerical control machine tools, Drag (Fluid dynamics)
Proceedings Papers

Experimental Investigations Into the Effect of Surface Roughness And Contact Force on Leakage Between Two Rigid Metallic Surfaces

Cyrille Bricaud, Oliver Schulz, Thomas Zierer, Vincent Peltier, Corina Schwitzke, Hans-Jörg Bauer
Proc. ASME. GT2021, Volume 5B: Heat Transfer — General Interest; Internal Air Systems; Internal Cooling, V05BT14A008, June 7–11, 2021
Paper No: GT2021-59163
DOI: https://doi.org/10.1115/GT2021-59163
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Topics: Compression, Leakage, Metal surfaces, Surface roughness
Proceedings Papers

Dependence of LPBF Surface Roughness on Laser Incidence Angle and Component Build Orientation

Ramesh Subramanian, David Rule, Onur Nazik
Proc. ASME. GT2021, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V007T17A015, June 7–11, 2021
Paper No: GT2021-59755
DOI: https://doi.org/10.1115/GT2021-59755
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Topics: Lasers, Surface roughness
Proceedings Papers

Effect of a Ceramic Matrix Composite Surface on Film Cooling

Peter H. Wilkins, Stephen P. Lynch, Karen A. Thole, San Quach, Tyler Vincent, Dominic Mongillo
Proc. ASME. GT2021, Volume 5A: Heat Transfer — Combustors; Film Cooling, V05AT12A020, June 7–11, 2021
Paper No: GT2021-59602
DOI: https://doi.org/10.1115/GT2021-59602
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Topics: Ceramic matrix composites, Film cooling, Temperature, Flow (Dynamics), Gas turbines, Simulation, Turbines, Computational fluid dynamics, Convection, Cooling
Proceedings Papers

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

Lorenzo Mazzei, Riccardo Da Soghe, Cosimo Bianchini
Proc. ASME. GT2021, Volume 5B: Heat Transfer — General Interest; Internal Air Systems; Internal Cooling, V05BT13A010, June 7–11, 2021
Paper No: GT2021-59603
DOI: https://doi.org/10.1115/GT2021-59603
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Topics: Additive manufacturing, Calibration, Computational fluid dynamics, Friction, Gas turbines, Heat transfer, Simulation, Surface roughness
Proceedings Papers

Numerical Analysis of Particle Deposition in an Aircraft Engine Compressor Cascade

Nicola Casari, Johannes Altmeppen, Christian Koch, Michele Pinelli, Stephan Staudacher, Alessio Suman, Alessandro Vulpio
Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT34A004, September 21–25, 2020
Paper No: GT2020-14506
DOI: https://doi.org/10.1115/GT2020-14506
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Topics: Aircraft engines, Cascades (Fluid dynamics), Compressors, Numerical analysis, Particulate matter, Flow (Dynamics), Adhesion, Computer simulation, Engines, Gas turbines
Proceedings Papers

Effect of Initial Surface Roughness on Water Erosion Resistance of Last Stage Blade Substrate of Steam Turbine

Fang Li, Shunsen Wang, Juan Di, Zhenping Feng
Proc. ASME. GT2020, Volume 2B: Turbomachinery, V02BT34A019, September 21–25, 2020
Paper No: GT2020-16262
DOI: https://doi.org/10.1115/GT2020-16262
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Topics: Blades, Drops, Erosion, Steam turbines, Surface roughness, Water
Proceedings Papers

Reynolds Number and Roughness Effects on Turbocompressor Performance: Numerical Calculations and Measurement Data Evaluation

Fabian Dietmann, Michael Casey, Damian M. Vogt
Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A016, September 21–25, 2020
Paper No: GT2020-14653
DOI: https://doi.org/10.1115/GT2020-14653
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Topics: Reynolds number, Surface roughness, Flow (Dynamics), Compressors, Design, Energy dissipation, Machinery
Proceedings Papers

Numerical Simulation of Pressure Loss and Heat Transfer Characteristics for Additively Manufactured Channels

Bryan Arko, Chad Iverson, Nicholas Staudigel
Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A022, September 21–25, 2020
Paper No: GT2020-14803
DOI: https://doi.org/10.1115/GT2020-14803
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Topics: Additive manufacturing, Computer simulation, Heat transfer, Pressure, Surface roughness, Computational fluid dynamics, Cooling, Modeling, Reynolds number, Friction
Proceedings Papers

Numerical and Experimental Study on Rotating Stall in Industrial Centrifugal Compressor

Toshimasa Miura, Hideaki Yamashita, Ryota Takeuchi, Naoto Sakai
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET39A010, September 21–25, 2020
Paper No: GT2020-14448
DOI: https://doi.org/10.1115/GT2020-14448
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Topics: Compressors, Vibration, Simulation, Computational fluid dynamics, Pressure, Impellers, Rotation, Vaneless diffusers, Aerodynamics, Annulus
Proceedings Papers

Comparative Assessment of Fouling Scenarios in an Axial Flow Compressor

Ioannis Templalexis, Vasilios Pachidis, Azamar Hasani
Proc. ASME. GT2020, Volume 5: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage, V005T06A002, September 21–25, 2020
Paper No: GT2020-14393
DOI: https://doi.org/10.1115/GT2020-14393
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Topics: Axial flow, Blades, Compressors, Engines, Filtration, Flow (Dynamics), Geometry, Particulate matter, Pressure, Service life (Equipment)
Proceedings Papers

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

Alexander J. Wildgoose, Karen A. Thole, Paul Sanders, Lieke Wang
Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A017, September 21–25, 2020
Paper No: GT2020-15049
DOI: https://doi.org/10.1115/GT2020-15049
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Topics: Additive manufacturing, Cooling, Surface roughness, Design, Friction, Pressure, Boundary-value problems, Gas turbines, Heat transfer, Lasers
Proceedings Papers

Mechanism of Novel Streamlined Roughness Element Enhancing the Flow and Heat Transfer Performance From Arrays of Impinging Jets

Zhuang Wu, Hui-ren Zhu, Cun-liang Liu, Lin Li, Qiang Gao, Zheng Zhang
Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A013, September 21–25, 2020
Paper No: GT2020-14747
DOI: https://doi.org/10.1115/GT2020-14747
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Topics: Discharge coefficient, Flow (Dynamics), Heat transfer, Jets, Surface roughness
Proceedings Papers

Parametric Study on Micro-Roughness Shapes for Enhanced Jet Impingement Heat Transfer

Ramaswamy Devakottai, Srivatsan Madhavan, Prashant Singh, Srinath V. Ekkad
Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A018, September 21–25, 2020
Paper No: GT2020-15051
DOI: https://doi.org/10.1115/GT2020-15051
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Topics: Heat transfer, Shapes, Surface roughness
Proceedings Papers

Topology Optimization of High Aspect Ratio Internal Cooling Channels As a Design for Additive Manufacturing

Shinjan Ghosh, Jayanta S. Kapat
Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A030, September 21–25, 2020
Paper No: GT2020-16032
DOI: https://doi.org/10.1115/GT2020-16032
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Topics: Additive manufacturing, Cooling, Design, Optimization, Topology, Fluids, Heat transfer, Blades, Gas turbines, Porosity
Proceedings Papers

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
Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A031, September 21–25, 2020
Paper No: GT2020-16069
DOI: https://doi.org/10.1115/GT2020-16069
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Topics: Additive manufacturing, Cooling, Flow (Dynamics), Surface roughness, Turbine blades, Turbulence, Friction, Computational fluid dynamics, Dimensions, Gravity (Force)