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Journal Articles

Wake Dynamics of Complex Turning Vanes Using Time-Resolved Particle Image Velocimetry Measurements

Andrew P. Hayden, John Gillespie, Cole Hefner, K. Todd Lowe, Alexandrina Untaroiu
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. January 2025, 147(1): 011501.
Paper No: FE-23-1522
https://doi.org/10.1115/1.4065963
Published Online: August 29, 2024
View Article titled, Wake Dynamics of Complex Turning Vanes Using Time-Resolved Particle Image Velocimetry Measurements
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Topics: Dynamics (Mechanics), Flow (Dynamics), Particle image velocimetry, Turning vanes, Wakes, Junctions, Turning angles, Principal component analysis
Journal Articles

High Throughflow StreamVane Swirl Distortion Generators: Design and Analysis

Andrew P. Hayden, John Gillespie, Cole Hefner, Alexandrina Untaroiu, K. Todd Lowe
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2024, 146(4): 041014.
Paper No: GTP-23-1483
https://doi.org/10.1115/1.4063709
Published Online: December 8, 2023
View Article titled, High Throughflow StreamVane Swirl Distortion Generators: Design and Analysis
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Topics: Computational fluid dynamics, Design, Generators, Mach number, Junctions, Chords (Trusses), Flow (Dynamics), Turning vanes
Journal Articles

Virginia Tech Optical Inlet Sensor for Particle Detection: Rolls Royce M250 Turboshaft Demonstration

Brittney Antous, Gwibo Byun, K. Todd Lowe, C. Fred Smith
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2024, 146(3): 031010.
Paper No: GTP-23-1285
https://doi.org/10.1115/1.4063584
Published Online: November 6, 2023
View Article titled, Virginia Tech Optical Inlet Sensor for Particle Detection: Rolls Royce M250 Turboshaft Demonstration
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Topics: Engines, Particulate matter, Sands, Sensors, Electromagnetic scattering, Radiation scattering, Scattering (Physics)
Journal Articles

Strategies for Computational Fluid Dynamics Validation Experiments

Aldo Gargiulo, Julie E. Duetsch-Patel, Aurelien Borgoltz, William J. Devenport, Christopher J. Roy, K. Todd Lowe
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. September 2023, 8(3): 031004.
Paper No: VVUQ-23-1011
https://doi.org/10.1115/1.4063639
Published Online: October 26, 2023
View Article titled, Strategies for Computational Fluid Dynamics Validation Experiments
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Topics: Computational fluid dynamics, Engineering simulation, Errors, Flow (Dynamics), Geometry, Particle image velocimetry, Pressure, Reynolds-averaged Navier–Stokes equations, Simulation, Turbulence
Journal Articles

Validation of Filtered Rayleigh Scattering Optical Rake Measurement Techniques in Turbomachinery Applications and Boundary Layers

Sean W. Powers, Gwibo Byun, K. Todd Lowe
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2024, 146(1): 011006.
Paper No: TURBO-23-1196
https://doi.org/10.1115/1.4063562
Published Online: October 25, 2023
View Article titled, Validation of Filtered Rayleigh Scattering Optical Rake Measurement Techniques in Turbomachinery Applications and Boundary Layers
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Topics: Boundary layers, Probes, Rayleigh scattering, Turbomachinery, Uncertainty, Temperature, Simulation, Lasers, Pressure, Resolution (Optics)
Proceedings Papers

Validation of Filtered Rayleigh Scattering Optical Rake Measurement Techniques in Turbomachinery Applications and Boundary Layers

Sean W. Powers, Gwibo Byun, K. Todd Lowe
Proc. ASME. GT2023, Volume 4: Controls, Diagnostics, and Instrumentation, V004T05A012, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102014
https://doi.org/10.1115/GT2023-102014
View Paper titled, Validation of Filtered Rayleigh Scattering Optical Rake Measurement Techniques in Turbomachinery Applications and Boundary Layers
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Topics: Boundary layers, Computational fluid dynamics, Rayleigh scattering, Turbomachinery
Proceedings Papers

Virginia Tech Optical Inlet Sensor for Particle Detection: Rolls Royce M250 Turboshaft Demonstration

Brittney Antous, Gwibo Byun, K. Todd Lowe, C. Fred Smith
Proc. ASME. GT2023, Volume 13C: Turbomachinery — Deposition, Erosion, Fouling, and Icing; Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V13CT31A010, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103669
https://doi.org/10.1115/GT2023-103669
View Paper titled, Virginia Tech Optical Inlet Sensor for Particle Detection: Rolls Royce M250 Turboshaft Demonstration
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Topics: Engines, Particulate matter, Sensors
Proceedings Papers

Analysis of C-Spec Particle Breakage in a Turbine Engine Particle Ingestion Test Cell

Tomas Vlach, Kristopher T. Olshefski, David J. Bunin, Alix M. Ehlers, Mark J. Caddick, K. Todd Lowe, Wing F. Ng
Proc. ASME. GT2023, Volume 13C: Turbomachinery — Deposition, Erosion, Fouling, and Icing; Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V13CT31A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101618
https://doi.org/10.1115/GT2023-101618
View Paper titled, Analysis of C-Spec Particle Breakage in a Turbine Engine Particle Ingestion Test Cell
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Topics: Engines, Erosion, Gas turbines, Particulate matter
Journal Articles

Modeling the Surface Pressure Spectrum on Rough Walls in Pressure Gradients

Daniel J. Fritsch, Vidya Vishwanathan, Christopher J. Roy, K. Todd Lowe, William J. Devenport
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. December 2023, 145(12): 121301.
Paper No: FE-23-1057
https://doi.org/10.1115/1.4062821
Published Online: September 19, 2023
View Article titled, Modeling the Surface Pressure Spectrum on Rough Walls in Pressure Gradients
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Topics: Flow (Dynamics), Modeling, Pressure, Pressure gradient, Surface roughness, Turbulence
Proceedings Papers

Numerical Simulation on the Vortex Shedding From Airfoils of a Swirl Distortion Generator

Andrew Hayden, Cole Hefner, Alexandrina Untaroiu, John Gillespie, K. Todd Lowe
Proc. ASME. GT2021, Volume 2D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V02DT39A005, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58963
https://doi.org/10.1115/GT2021-58963
View Paper titled, Numerical Simulation on the Vortex Shedding From Airfoils of a Swirl Distortion Generator
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Topics: Airfoils, Computer simulation, Generators, Vortex shedding, Boundary layers, Turning angles, Aircraft, Cascades (Fluid dynamics), Computational fluid dynamics, Design
Proceedings Papers

Non-Circular and Non-Cylindrical Streamvanes

John Gillespie, K. Todd Lowe
Proc. ASME. GT2020, Volume 1: Aircraft Engine; Fans and Blowers, V001T01A031, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15763
https://doi.org/10.1115/GT2020-15763
View Paper titled, Non-Circular and Non-Cylindrical Streamvanes
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Topics: Aircraft, Computational fluid dynamics, Conceptual design, Diffusers, Ducts, Engines, Errors, Flight, Flow (Dynamics), Geometry
Proceedings Papers

Development, Analysis, and Validation of a Simultaneous Inlet Total Pressure and Swirl Distortion Generator

Dustin J. Frohnapfel, K. Todd Lowe, Walter F. O’Brien
Proc. ASME. GT2020, Volume 1: Aircraft Engine; Fans and Blowers, V001T01A038, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16125
https://doi.org/10.1115/GT2020-16125
View Paper titled, Development, Analysis, and Validation of a Simultaneous Inlet Total Pressure and Swirl Distortion Generator
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Topics: Generators, Pressure, Turbofans
Proceedings Papers

On the Application of Particle Image Velocimetry for Turbofan Engine Flow Quantification

Dillon P. Sluss, William M. George, K. Todd Lowe
Proc. ASME. GT2019, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Honors and Awards, V001T01A027, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-92064
https://doi.org/10.1115/GT2019-92064
View Paper titled, On the Application of Particle Image Velocimetry for Turbofan Engine Flow Quantification
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Topics: Engine flow, Particulate matter, Turbofans, Imaging, Endoscopic devices, Ducts, Engines, Lenses (Optics), Uncertainty, Flow (Dynamics)
Proceedings Papers

Turbofan Nose Cone Interactions With Inlet Swirl

Dustin J. Frohnapfel, Elizabeth Mack, Alexandrina Untaroiu, Walter F. O’Brien, K. Todd Lowe
Proc. ASME. GT2018, Volume 1: Aircraft Engine; Fans and Blowers; Marine, V001T01A032, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-76616
https://doi.org/10.1115/GT2018-76616
View Paper titled, Turbofan Nose Cone Interactions With Inlet Swirl
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Topics: Turbofans, Fluids, Ducts, Engines, Architecture, Aviation, Computational fluid dynamics, Flow (Dynamics), Geometry, Modeling
Journal Articles

Complex Flow Generation and Development in a Full-Scale Turbofan Inlet

Tamara Guimarães, K. Todd Lowe, Walter F. O'Brien
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 082606.
Paper No: GTP-17-1545
https://doi.org/10.1115/1.4039179
Published Online: May 14, 2018
View Article titled, Complex Flow Generation and Development in a Full-Scale Turbofan Inlet
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Topics: Engines, Flow (Dynamics), Turbulence, Turbofans, Vortices, Aircraft, Stress
Journal Articles

Experimental Quantification of Fan Rotor Effects on Inlet Swirl Using Swirl Distortion Descriptors

Dustin J. Frohnapfel, K. Todd Lowe, Walter F. O'Brien
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 082603.
Paper No: GTP-17-1631
https://doi.org/10.1115/1.4039425
Published Online: May 3, 2018
View Article titled, Experimental Quantification of Fan Rotor Effects on Inlet Swirl Using Swirl Distortion Descriptors
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Topics: Engines, Flow (Dynamics), Rotors, Vortices, Design, Turbofans
Proceedings Papers

Application of Proper Orthogonal Decomposition to High Speed Imaging for the Study of Combustion Oscillations

Siddhartha Gadiraju, Suhyeon Park, David Gomez-Ramirez, Srinath V. Ekkad, K. Todd Lowe, Hee-Koo Moon, Yong Kim, Ram Srinivasan
Proc. ASME. GT2017, Volume 4B: Combustion, Fuels and Emissions, V04BT04A031, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64602
https://doi.org/10.1115/GT2017-64602
View Paper titled, Application of Proper Orthogonal Decomposition to High Speed Imaging for the Study of Combustion Oscillations
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Topics: Combustion, Imaging, Oscillations, Principal component analysis, Flames, Fuels, Combustion chambers, Nozzles, Pressure measurement, Reynolds number
Proceedings Papers

Complex Flow Generation and Development in a Full-Scale Turbofan Inlet

Tamara Guimarães, K. Todd Lowe, Walter F. O’Brien
Proc. ASME. GT2017, Volume 2B: Turbomachinery, V02BT42A012, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64756
https://doi.org/10.1115/GT2017-64756
View Paper titled, Complex Flow Generation and Development in a Full-Scale Turbofan Inlet
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Topics: Flow (Dynamics), Turbofans, Engines, Vortices, Aircraft, Inflow, Stress, Swirling flow, Turbulence, Aerodynamics
Proceedings Papers

Experimental Quantification of Fan Rotor Effects on Inlet Swirl Using Swirl Distortion Descriptors

Dustin J. Frohnapfel, Walter F. O’Brien, K. Todd Lowe
Proc. ASME. GT2017, Volume 2B: Turbomachinery, V02BT42A013, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64779
https://doi.org/10.1115/GT2017-64779
View Paper titled, Experimental Quantification of Fan Rotor Effects on Inlet Swirl Using Swirl Distortion Descriptors
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Topics: Rotors, Engines, Flow (Dynamics), Design, Turbofans, Aircraft, Architecture, Generators
Proceedings Papers

Analysis of Base-Cooled Total Temperature Probes With Radiation

Joseph A. Schetz, Tyler Vincent, K. Todd Lowe
Proc. ASME. IMECE2016, Volume 1: Advances in Aerospace Technology, V001T03A047, November 11–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2016-65130
https://doi.org/10.1115/IMECE2016-65130
View Paper titled, Analysis of Base-Cooled Total Temperature Probes With Radiation
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Topics: Probes, Radiation (Physics), Temperature, Heat conduction, Convection, Design, Flow (Dynamics), Computational methods, Errors, Heat transfer