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Proceedings Papers

AOV Quarter-Turn Efficiency Models and Validation

Zachary Leutwyler, Emil Leutwyler, Neal Estep

Proc. ASME. NRC2014, ASME/NRC 2014 12th Valves, Pumps, and Inservice Testing Symposium, 192-207, June 23–25, 2014

Paper No: NRC2014-5031

DOI: https://doi.org/10.1115/NRC2014-5031

View Paper titled, AOV Quarter-Turn Efficiency Models and Validation

Topics: Actuators, Bearings, Bronze, Design, Diaphragms (Mechanical devices), Diaphragms (Structural), Friction, Levers, Needles, Nuclear power stations

Proceedings Papers

Effective Diaphragm Area Test Program for Air-Operated Valve Actuators

Zachary Leutwyler, Lisa Thidavanh, Neal Estep

Proc. ASME. NRC2014, ASME/NRC 2014 12th Valves, Pumps, and Inservice Testing Symposium, 181-191, June 23–25, 2014

Paper No: NRC2014-5028

DOI: https://doi.org/10.1115/NRC2014-5028

View Paper titled, Effective Diaphragm Area Test Program for Air-Operated Valve Actuators

Topics: Diaphragms (Mechanical devices), Diaphragms (Structural), Valve actuators, Actuators, Testing, Pressure, Springs, Design, Manufacturing, Measurement uncertainty

Proceedings Papers

New Validated Methodology for the Required Force to Operate Balanced Disk Globe Valves

Zachary Leutwyler, Kenneth Beasley, Emil Leutwyler, Mital Mistry

Proc. ASME. PVS2017, ASME/NRC 2017 13th Pump and Valve Symposium, V001T03A003, July 17–18, 2017

Paper No: PVS2017-3513

DOI: https://doi.org/10.1115/PVS2017-3513

View Paper titled, New Validated Methodology for the Required Force to Operate Balanced Disk Globe Valves

Topics: Disks, Valves, Flow (Dynamics), Computational fluid dynamics, Pipes, Computer software, Electricity (Physics), Fluids, Temperature, Testing

Proceedings Papers

Effective Diaphragm Area Test Program for Air Operated Valve Actuators

Zachary Leutwyler, Manmohan Kalsi, Lisa Thidavanh, Laurie Luckhardt, Thomas Cunningham

Proc. ASME. PVS2017, ASME/NRC 2017 13th Pump and Valve Symposium, V001T03A008, July 17–18, 2017

Paper No: PVS2017-3537

DOI: https://doi.org/10.1115/PVS2017-3537

View Paper titled, Effective Diaphragm Area Test Program for Air Operated Valve Actuators

Topics: Diaphragms (Mechanical devices), Diaphragms (Structural), Valve actuators, Actuators, Manufacturing, Measurement uncertainty, Pressure, Springs, Testing, Design

Proceedings Papers

Advanced Performance Prediction Models for Globe Valves Under Design Basis Conditions

Zachary Leutwyler, Neal Estep, Nimish Jagtap

Proc. ASME. ICONE20-POWER2012, Volume 1: Plant Operations, Maintenance, Engineering, Modifications, Life Cycle, and Balance of Plant; Component Reliability and Materials Issues; Steam Generator Technology Applications and Innovations; Advanced Reactors and Near-Term Deployment; Reactor Physics, Neutronics, and Transport Theory; Nuclear Education, Human Resources, and Public Acceptance, 507-515, July 30–August 3, 2012

Paper No: ICONE20-POWER2012-55038

DOI: https://doi.org/10.1115/ICONE20-POWER2012-55038

View Paper titled, Advanced Performance Prediction Models for Globe Valves Under Design Basis Conditions

Topics: Computational fluid dynamics, Design, Finite element analysis, Modeling, Testing, Valves

Proceedings Papers

Power Uprate Evaluation of Main Steam Isolation and Main Steam Check Valve Using Advanced Engineering Models

M. S. Kalsi, Neal Estep, Zachary Leutwyler

Proc. ASME. ICONE18, 18th International Conference on Nuclear Engineering: Volume 6, 479-483, May 17–21, 2010

Paper No: ICONE18-30295

DOI: https://doi.org/10.1115/ICONE18-30295

View Paper titled, Power Uprate Evaluation of Main Steam Isolation and Main Steam Check Valve Using Advanced Engineering Models

Topics: Engineering models, Power uprate, Steam, Valves

Proceedings Papers

Fluid Flow Force Measurement Under Various Cavitation State on a Globe Valve Model

Jerome Ferrari, Zachary Leutwyler

Proc. ASME. PVP2008, Volume 4: Fluid-Structure Interaction, 157-165, July 27–31, 2008

Paper No: PVP2008-61238

DOI: https://doi.org/10.1115/PVP2008-61238

View Paper titled, Fluid Flow Force Measurement Under Various Cavitation State on a Globe Valve Model

Topics: Cavitation, Fluid dynamics, Force measurement, Valves, Flow (Dynamics), Disks, Computational fluid dynamics, Actuators, Pressure, Testing

Proceedings Papers

A CFD Study to Analyze the Aerodynamic Torque, Lift, and Drag Forces for a Butterfly Valve in the Mid-Stroke Position

Zachary Leutwyler, Charles Dalton

Proc. ASME. HT-FED2004, Volume 2, Parts A and B, 41-49, July 11–15, 2004

Paper No: HT-FED2004-56016

DOI: https://doi.org/10.1115/HT-FED2004-56016

View Paper titled, A CFD Study to Analyze the Aerodynamic Torque, Lift, and Drag Forces for a Butterfly Valve in the Mid-Stroke Position

Topics: Compressible flow, Computational fluid dynamics, Drag (Fluid dynamics), Torque, Valves

Proceedings Papers

A CFD Study of the Flow Field, Resultant Force, and Aerodynamic Torque on a Symmetric Disc Butterfly Valve in a Compressible Fluid

Zachary Leutwyler, Charles Dalton

Proc. ASME. FEDSM2006, Volume 1: Symposia, Parts A and B, 139-147, July 17–20, 2006

Paper No: FEDSM2006-98009

DOI: https://doi.org/10.1115/FEDSM2006-98009

View Paper titled, A CFD Study of the Flow Field, Resultant Force, and Aerodynamic Torque on a Symmetric Disc Butterfly Valve in a Compressible Fluid

Topics: Computational fluid dynamics, Disks, Flow (Dynamics), Fluids, Torque, Valves

Journal Articles

A CFD Study of the Flow Field, Resultant Force, and Aerodynamic Torque on a Symmetric Disk Butterfly Valve in a Compressible Fluid

Zachary Leutwyler, Charles Dalton

J. Pressure Vessel Technol. May 2008, 130(2): 021302.

DOI: https://doi.org/10.1115/1.2891929

Published Online: March 19, 2008

View Article titled, A CFD Study of the Flow Field, Resultant Force, and Aerodynamic Torque on a Symmetric Disk Butterfly Valve in a Compressible Fluid

Topics: Disks, Flow (Dynamics), Torque, Valves, Pressure, Computational fluid dynamics

Journal Articles

A Computational Study of Torque and Forces Due to Compressible Flow on a Butterfly Valve Disk in Mid-stroke Position

Zachary Leutwyler, Charles Dalton

J. Fluids Eng. September 2006, 128(5): 1074–1082.

DOI: https://doi.org/10.1115/1.2236129

Published Online: February 11, 2006

View Article titled, A Computational Study of Torque and Forces Due to Compressible Flow on a Butterfly Valve Disk in Mid-stroke Position

Topics: Disks, Flow (Dynamics), Pressure, Torque, Valves, Compressible flow, Turbulence

Journal citation

NARROW

AOV Quarter-Turn Efficiency Models and Validation

Effective Diaphragm Area Test Program for Air-Operated Valve Actuators

New Validated Methodology for the Required Force to Operate Balanced Disk Globe Valves

Effective Diaphragm Area Test Program for Air Operated Valve Actuators

Advanced Performance Prediction Models for Globe Valves Under Design Basis Conditions

Power Uprate Evaluation of Main Steam Isolation and Main Steam Check Valve Using Advanced Engineering Models

Fluid Flow Force Measurement Under Various Cavitation State on a Globe Valve Model

A CFD Study to Analyze the Aerodynamic Torque, Lift, and Drag Forces for a Butterfly Valve in the Mid-Stroke Position

A CFD Study of the Flow Field, Resultant Force, and Aerodynamic Torque on a Symmetric Disc Butterfly Valve in a Compressible Fluid

A CFD Study of the Flow Field, Resultant Force, and Aerodynamic Torque on a Symmetric Disk Butterfly Valve in a Compressible Fluid

A Computational Study of Torque and Forces Due to Compressible Flow on a Butterfly Valve Disk in Mid-stroke Position

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