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James H. Leylek
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Proceedings Papers

Numerical Analysis of Air Curtain Jet Blast Deflector

Stuart Fletcher, D. Keith Walters, James H. Leylek
Proc. ASME. IMECE2023, Volume 9: Fluids Engineering, V009T10A035, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-117140
https://doi.org/10.1115/IMECE2023-117140
View Paper titled, Numerical Analysis of Air Curtain Jet Blast Deflector
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Topics: Aircraft, Aircraft engines, Computational fluid dynamics, Design, Engineering simulation, Engines, Exhaust systems, Flight, Flow (Dynamics), Fluid dynamics
Proceedings Papers

Investigation of Dynamic Hybrid RANS-LES Turbulence Modeling for CFD Simulation of a Normal Jet in Crossflow

Cole C. Simmonds, D. Keith Walters, James H. Leylek
Proc. ASME. IMECE2023, Volume 9: Fluids Engineering, V009T10A019, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-117073
https://doi.org/10.1115/IMECE2023-117073
View Paper titled, Investigation of Dynamic Hybrid RANS-LES Turbulence Modeling for CFD Simulation of a Normal Jet in Crossflow
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Topics: Computational fluid dynamics, Modeling, Reynolds-averaged Navier–Stokes equations, Simulation, Turbulence
Journal Articles

The Influence of Womersley Number on Non-Newtonian Effects: Transient Computational Study of Blood Rheology

Joseph P. Simpson, James H. Leylek
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. January 2023, 145(1): 011206.
Paper No: FE-22-1202
https://doi.org/10.1115/1.4055400
Published Online: October 3, 2022
View Article titled, The Influence of Womersley Number on Non-Newtonian Effects: Transient Computational Study of Blood Rheology
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Topics: Blood, Flow (Dynamics), Geometry, Rheology, Shear (Mechanics), Transients (Dynamics), Simulation, Viscosity, Cycles
Journal Articles

Analysis of Helical Grafts in Steady and Unsteady Flow: Development of a Novel Bypass Graft

Joseph P. Simpson, James H. Leylek
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. January 2023, 145(1): 011205.
Paper No: FE-22-1201
https://doi.org/10.1115/1.4055399
Published Online: October 3, 2022
View Article titled, Analysis of Helical Grafts in Steady and Unsteady Flow: Development of a Novel Bypass Graft
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Topics: Flow (Dynamics), Geometry, Pressure drop, Simulation, Unsteady flow
Proceedings Papers

A Systematic Computational Methodology Applied to a Three–Dimensional Film–Cooling Flowfield

Dibbon K. Walters, James H. Leylek
Proc. ASME. GT1996, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A040, June 10–13, 1996
Publisher: American Society of Mechanical Engineers
Paper No: 96-GT-351
https://doi.org/10.1115/96-GT-351
View Paper titled, A Systematic Computational Methodology Applied to a Three–Dimensional Film–Cooling Flowfield
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Topics: Film cooling, Turbulence, Density, Errors, Flat plates, Gas turbines, Jets, Mesh generation, Modeling, Simulation
Proceedings Papers

Effects of Geometry on Slot–Jet Film Cooling Performance

Daniel G. Hyams, Kevin T. McGovern, James H. Leylek
Proc. ASME. GT1996, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A016, June 10–13, 1996
Publisher: American Society of Mechanical Engineers
Paper No: 96-GT-187
https://doi.org/10.1115/96-GT-187
View Paper titled, Effects of Geometry on Slot–Jet Film Cooling Performance
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Topics: Film cooling, Geometry, Engineering simulation, Simulation, Density, Flow (Dynamics), Gas turbines, Heat transfer coefficients, Jets, Physics
Proceedings Papers

A Detailed Analysis of Film–Cooling Physics: Part I — Streamwise Injection With Cylindrical Holes

Dibbon K. Walters, James H. Leylek
Proc. ASME. GT1997, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T09A052, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-269
https://doi.org/10.1115/97-GT-269
View Paper titled, A Detailed Analysis of Film–Cooling Physics: Part I — Streamwise Injection With Cylindrical Holes
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Topics: Film cooling, Physics, Flow (Dynamics), Vorticity, Turbulence, Boundary layers, Computer simulation, Coolants, Density, Design
Proceedings Papers

A Detailed Analysis of Film Cooling Physics: Part II — Compound–Angle Injection With Cylindrical Holes

Kevin T. McGovern, James H. Leylek
Proc. ASME. GT1997, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T09A053, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-270
https://doi.org/10.1115/97-GT-270
View Paper titled, A Detailed Analysis of Film Cooling Physics: Part II — Compound–Angle Injection With Cylindrical Holes
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Topics: Film cooling, Physics, Coolants, Vortices, Engineering simulation, Flow (Dynamics), Simulation, Cooling, Density, Heat transfer coefficients
Proceedings Papers

A Detailed Analysis of Film Cooling Physics: Part III — Streamwise Injection With Shaped Holes

Daniel G. Hyams, James H. Leylek
Proc. ASME. GT1997, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T09A054, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-271
https://doi.org/10.1115/97-GT-271
View Paper titled, A Detailed Analysis of Film Cooling Physics: Part III — Streamwise Injection With Shaped Holes
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Topics: Film cooling, Physics, Flow (Dynamics), Shapes, Vorticity, Density, Gas turbines, Heat transfer, Heat transfer coefficients, Jets
Proceedings Papers

A Detailed Analysis of Film Cooling Physics: Part IV — Compound–Angle Injection With Shaped Holes

Robert A. Brittingham, James H. Leylek
Proc. ASME. GT1997, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T09A055, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-272
https://doi.org/10.1115/97-GT-272
View Paper titled, A Detailed Analysis of Film Cooling Physics: Part IV — Compound–Angle Injection With Shaped Holes
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Topics: Film cooling, Physics, Jets, Computation, Coolants, Density, Engineering simulation, Flat plates, Flow (Dynamics), Gas turbines
Proceedings Papers

Performance of Turbulence Models and Near-Wall Treatments in Discrete Jet Film Cooling Simulations

Jeffrey D. Ferguson, Dibbon K. Walters, James H. Leylek
Proc. ASME. GT1998, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A077, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-438
https://doi.org/10.1115/98-GT-438
View Paper titled, Performance of Turbulence Models and Near-Wall Treatments in Discrete Jet Film Cooling Simulations
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Topics: Engineering simulation, Film cooling, Simulation, Turbulence, Equilibrium (Physics), Renormalization (Physics), Stress
Proceedings Papers

Physics of Hot Crossflow Ingestion in Film Cooling

E. Lee McGrath, James H. Leylek
Proc. ASME. GT1998, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A042, June 2–5, 1998
Publisher: American Society of Mechanical Engineers
Paper No: 98-GT-191
https://doi.org/10.1115/98-GT-191
View Paper titled, Physics of Hot Crossflow Ingestion in Film Cooling
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Topics: Film cooling, Physics, Flow (Dynamics), Coolants, Gas turbines, Computational fluid dynamics, Density, Geometry, Modeling, Reynolds number
Proceedings Papers

Impact of Film–Cooling Jets on Turbine Aerodynamic Losses

Dibbon K. Walters, James H. Leylek
Proc. ASME. GT1999, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A093, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-421
https://doi.org/10.1115/99-GT-421
View Paper titled, Impact of Film–Cooling Jets on Turbine Aerodynamic Losses
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Topics: Film cooling, Jets, Turbines, Pressure, Airfoils, Blades, Flow (Dynamics), Simulation, Suction, Cascades (Fluid dynamics)
Proceedings Papers

Numerical Prediction of Mainstream Pressure Gradient Effects in Film Cooling

William D. York, James H. Leylek
Proc. ASME. GT1999, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A046, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-166
https://doi.org/10.1115/99-GT-166
View Paper titled, Numerical Prediction of Mainstream Pressure Gradient Effects in Film Cooling
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Topics: Film cooling, Pressure gradient, Pressure, Airfoils, Gas turbines, Turbulence, Computational fluid dynamics, Density, Flow (Dynamics), Modeling
Proceedings Papers

A New Unsteady-Based Turbulence Model to Predict Shear Layer Rollup and Breakdown

D. Scott Holloway, James H. Leylek
Proc. ASME. HT-FED2004, Volume 2, Parts A and B, 727-734, July 11–15, 2004
Publisher: American Society of Mechanical Engineers
Paper No: HT-FED2004-56367
https://doi.org/10.1115/HT-FED2004-56367
View Paper titled, A New Unsteady-Based Turbulence Model to Predict Shear Layer Rollup and Breakdown
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Topics: Shear (Mechanics), Turbulence, Flow (Dynamics), Engineering simulation, Simulation, Stress, Aircraft, Airfoils, Automobiles, Clearances (Engineering)
Proceedings Papers

Simulation of Transitional Boundary-Layer Development on a Highly-Loaded Turbine Cascade With Advanced RANS Modeling

D. Keith Walters, James H. Leylek
Proc. ASME. GT2003, Volume 5: Turbo Expo 2003, Parts A and B, 799-810, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38664
https://doi.org/10.1115/GT2003-38664
View Paper titled, Simulation of Transitional Boundary-Layer Development on a Highly-Loaded Turbine Cascade With Advanced RANS Modeling
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Topics: Boundary layers, Cascades (Fluid dynamics), Modeling, Reynolds-averaged Navier–Stokes equations, Simulation, Turbines, Turbulence
Proceedings Papers

Ability of a Popular Turbulence Model to Capture Curvature Effects: A Film Cooling Test Case

Satish Undapalli, James H. Leylek
Proc. ASME. GT2003, Volume 5: Turbo Expo 2003, Parts A and B, 527-539, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38638
https://doi.org/10.1115/GT2003-38638
View Paper titled, Ability of a Popular Turbulence Model to Capture Curvature Effects: A Film Cooling Test Case
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Topics: Film cooling, Modeling, Turbulence
Proceedings Papers

Three-Dimensional Conjugate Heat Transfer Simulation of an Internally-Cooled Gas Turbine Vane

William D. York, James H. Leylek
Proc. ASME. GT2003, Volume 5: Turbo Expo 2003, Parts A and B, 351-360, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38551
https://doi.org/10.1115/GT2003-38551
View Paper titled, Three-Dimensional Conjugate Heat Transfer Simulation of an Internally-Cooled Gas Turbine Vane
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Topics: Gas turbines, Heat transfer, Simulation, Metals, Temperature, Boundary-value problems, Cascades (Fluid dynamics), Convection, Coolants, Cooling
Proceedings Papers

A CFD Study of Wake-Induced Transition on a Compressor-Like Flat Plate

D. Keith Walters, James H. Leylek
Proc. ASME. GT2003, Volume 6: Turbo Expo 2003, Parts A and B, 565-578, June 16–19, 2003
Publisher: American Society of Mechanical Engineers
Paper No: GT2003-38680
https://doi.org/10.1115/GT2003-38680
View Paper titled, A CFD Study of Wake-Induced Transition on a Compressor-Like Flat Plate
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Topics: Boundary layers, Compressors, Computational fluid dynamics, Flat plates, Modeling, Reynolds-averaged Navier–Stokes equations, Wakes
Proceedings Papers

Film Cooling on a Modern HP Turbine Blade: Part II — Compound-Angle Round Holes

D. Keith Walters, James H. Leylek, Frederick A. Buck
Proc. ASME. GT2002, Volume 3: Turbo Expo 2002, Parts A and B, 1095-1101, June 3–6, 2002
Publisher: American Society of Mechanical Engineers
Paper No: GT2002-30613
https://doi.org/10.1115/GT2002-30613
View Paper titled, Film Cooling on a Modern HP Turbine Blade: Part II — Compound-Angle Round Holes
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Topics: Film cooling, Turbine blades, Coolants, Flow (Dynamics), Physics, Pressure, Suction, Turbulence, Airfoils, Blades