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Journal Articles

Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator

Dara W. Childs, Jing Yang, Luis San Andrés, Jose M. Torres Rueda, James Alex Moreland

J. Eng. Gas Turbines Power. March 2023, 145(3): 031005.

Paper No: GTP-22-1435

DOI: https://doi.org/10.1115/1.4055638

Published Online: December 5, 2022

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Topics: Leakage, Rotors, Stators, Stiffness, Damping, Pumps

Proceedings Papers

Negative Centering Forces of Wet-Gas Hole-Pattern Seals at Low Excitation Frequencies

Min Zhang, Dara W. Childs

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT22A024, June 13–17, 2022

Paper No: GT2022-83504

DOI: https://doi.org/10.1115/GT2022-83504

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Topics: Excitation, Pressure, Stiffness, Compression, Damping, Dimensions, Flow (Dynamics), Leakage, Testing

Proceedings Papers

Leakage and Rotordynamic Performance of a Hole-Pattern Multiphase Pump Seal

Min Zhang, Dara W. Childs

Paper No: GT2022-83499

DOI: https://doi.org/10.1115/GT2022-83499

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Topics: Leakage, Pumps

Proceedings Papers

Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator

Dara W. Childs, Jing Yang, Luis San Andrés, Jose M. Torres Rueda, J. Alex Moreland

Paper No: GT2022-80073

DOI: https://doi.org/10.1115/GT2022-80073

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Topics: Leakage, Rotors, Stators, Damping, Geometry, Pressure, Pumps, Stability, Brakes, Clearances (Engineering)

Journal Articles

Effects of Increased Tooth Clearance on the Performance of a Labyrinth Seal With Oil-Rich Bubbly Laminar Flow

Min Zhang, Dara W. Childs

J. Eng. Gas Turbines Power. November 2021, 143(11): 111007.

Paper No: GTP-21-1278

DOI: https://doi.org/10.1115/1.4051914

Published Online: September 27, 2021

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Topics: Clearances (Engineering), Flow (Dynamics), Leakage, Pumps, Rotors, Stiffness, Stators, Fluids, Pressure drop, Laminar flow

Journal Articles

Performance of a Long Smooth Multiphase Pump Seal in Different Flow Regimes

Min Zhang, Dara W. Childs

J. Eng. Gas Turbines Power. November 2021, 143(11): 111009.

Paper No: GTP-21-1280

DOI: https://doi.org/10.1115/1.4051952

Published Online: September 27, 2021

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Topics: Flow (Dynamics), Turbulence, Laminar flow, Pumps

Proceedings Papers

Effects of Increased Tooth Clearance on the Performance of a Labyrinth Seal With Oil-Rich Bubbly Laminar Flow

Min Zhang, Dara W. Childs

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A021, June 7–11, 2021

Paper No: GT2021-60106

DOI: https://doi.org/10.1115/GT2021-60106

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Topics: Clearances (Engineering), Laminar flow, Pumps

Proceedings Papers

Static Performance of Smooth Liquid Annular Seals in the Transition and Turbulent Regimes

Dara W. Childs, Joshua Bullock

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A002, June 7–11, 2021

Paper No: GT2021-58543

DOI: https://doi.org/10.1115/GT2021-58543

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Topics: Turbulence, Flow (Dynamics), Reynolds number, Clearances (Engineering), Displacement, Flowmeters, Friction, Leakage, Pressure, Pressure drop

Proceedings Papers

Performance of a Long Smooth Multiphase Pump Seal in Different Flow Regimes

Min Zhang, Dara W. Childs

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A022, June 7–11, 2021

Paper No: GT2021-60108

DOI: https://doi.org/10.1115/GT2021-60108

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Topics: Flow (Dynamics), Pumps

Journal Articles

Behaviors of a Hole-Pattern Seal With Wet-Gas

Min Zhang, Dara W. Childs

J. Tribol. December 2021, 143(12): 121807.

Paper No: TRIB-21-1156

DOI: https://doi.org/10.1115/1.4052254

Published Online: September 15, 2021

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Topics: Air flow, Compressors, Damping, Design, Flow (Dynamics), Leakage, Rotors, Stability, Excitation, Stiffness

Proceedings Papers

A Comparison of Experimental Results and Theoretical Predictions for the Rotordynamic Coefficients of Short (L/D = 1/6) Labyrinth Seals

Joseph M. Pelletti, Dara W. Childs

Proc. ASME. DETC91, 13th Biennial Conference on Mechanical Vibration and Noise: Rotating Machinery and Vehicle Dynamics, 69-76, September 22–25, 1991

Paper No: DETC1991-0231

DOI: https://doi.org/10.1115/DETC1991-0231

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Topics: Clearances (Engineering), Compressible flow, Damping, Fluid density, Fluids, Pressure, Rotors, Stators, Stiffness

Proceedings Papers

Theory Versus Experiment for Short (L/D = 1/6) Honeycomb and Smooth Annular Pressure Seals

Dara W. Childs, George F. Kleynhans

Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration of Rotating Systems, 173-179, September 19–22, 1993

Paper No: DETC1993-0191

DOI: https://doi.org/10.1115/DETC1993-0191

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Topics: Honeycomb structures, Pressure, Leakage, Friction, Rotors, Clearances (Engineering), Computers, Flat plates, Flow (Dynamics), Pipes

Proceedings Papers

The Effects of Converging and Diverging Axial Taper on the Rotordynamic Coefficients of Liquid Annular Pressure Seals: Theory Versus Experiment

W. Todd Lindsey, Dara W. Childs

Proc. ASME. DETC95, Volume 3B: 15th Biennial Conference on Mechanical Vibration and Noise — Acoustics, Vibrations, and Rotating Machines, 1139-1147, September 17–20, 1995

Paper No: DETC1995-0509

DOI: https://doi.org/10.1115/DETC1995-0509

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Topics: Pressure, Stiffness, Damping, Leakage, Clearances (Engineering), Rotation, Turbulence

Proceedings Papers

Theory Versus Experiment for the Effects of Pressure Ratio on the Performance of an Orifice-Compensated Hybrid Bearing

Phillip Mosher, Dara W. Childs

Proc. ASME. DETC95, Volume 3B: 15th Biennial Conference on Mechanical Vibration and Noise — Acoustics, Vibrations, and Rotating Machines, 1119-1129, September 17–20, 1995

Paper No: DETC1995-0507

DOI: https://doi.org/10.1115/DETC1995-0507

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Topics: Bearings, Pressure, Stress, Flow (Dynamics), High pressure (Physics), Hydrostatics, Navier-Stokes equations, Stiffness, Torque, Whirls

Journal Articles

Test Results for the Static and Rotordynamic Characteristics of a Long ( L/D = 0.75) Smooth Seal in Two-Phase (Mainly Gas) Conditions With a 62-Bar Inlet Pressure

Dung L. Tran, Dara W. Childs, Hari Shrestha, Min Zhang

J. Eng. Gas Turbines Power. April 2021, 143(4): 041010.

Paper No: GTP-20-1638

DOI: https://doi.org/10.1115/1.4049773

Published Online: February 26, 2021

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Topics: Damping, Flow (Dynamics), Leakage, Pressure, Stiffness, Computational fluid dynamics, Density, Two-phase flow, Viscosity

Proceedings Papers

Clearance Effects on Spiral Vibrations due to Rubbing

Dara W. Childs, Leland T. Jordan

Proc. ASME. DETC97, Volume 1B: 16th Biennial Conference on Mechanical Vibration and Noise, V01BT07A018, September 14–17, 1997

Paper No: DETC97/VIB-4058

DOI: https://doi.org/10.1115/DETC97/VIB-4058

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Topics: Clearances (Engineering), Vibration, Engineering simulation, Simulation, Stability

Proceedings Papers

Test Results for the Static and Rotordynamic Characteristics of a Long (L/D = 0.75) Smooth Seal in Two-Phase (Mainly Gas) Conditions With a 62-Bar Inlet Pressure

Dung L. Tran, Dara W. Childs, Hari Shrestha, Min Zhang

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A001, September 21–25, 2020

Paper No: GT2020-14118

DOI: https://doi.org/10.1115/GT2020-14118

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Topics: Pressure, Stiffness, Damping, Flow (Dynamics), Gas turbines, Geometry, Leakage, Multiphase flow, Pistons, Pumps

Proceedings Papers

Effects of Clearance on the Performance of a Labyrinth Seal Under Wet-Gas Conditions

Min Zhang, Dara W. Childs, Dung L. Tran, Hari Shrestha

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A007, September 21–25, 2020

Paper No: GT2020-14267

DOI: https://doi.org/10.1115/GT2020-14267

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Topics: Clearances (Engineering), Leakage

Proceedings Papers

Experimental Study on the Performance of a See-Through Labyrinth Seal With Two-Phase, Mainly-Liquid Mixtures

Min Zhang, Dara W. Childs

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A008, September 21–25, 2020

Paper No: GT2020-14268

DOI: https://doi.org/10.1115/GT2020-14268

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Topics: Centrifugal pumps, Clearances (Engineering), Damping, Flow (Dynamics), Fluids, Friction, Gas industry, Leakage, Pistons, Pressure

Journal Articles

Experimental Study on the Performance of a See-Through Labyrinth Seal With Two-Phase, Mainly-Liquid Mixtures

Min Zhang, Dara W. Childs

J. Eng. Gas Turbines Power. January 2021, 143(1): 011015.

Paper No: GTP-20-1477

DOI: https://doi.org/10.1115/1.4048799

Published Online: January 4, 2021

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Topics: Flow (Dynamics), Fluids, Leakage, Pumps, Rotors, Stiffness, Pressure, Clearances (Engineering), Damping, Friction

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Journal citation

NARROW

Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator

Negative Centering Forces of Wet-Gas Hole-Pattern Seals at Low Excitation Frequencies

Leakage and Rotordynamic Performance of a Hole-Pattern Multiphase Pump Seal

Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator

Effects of Increased Tooth Clearance on the Performance of a Labyrinth Seal With Oil-Rich Bubbly Laminar Flow

Performance of a Long Smooth Multiphase Pump Seal in Different Flow Regimes

Effects of Increased Tooth Clearance on the Performance of a Labyrinth Seal With Oil-Rich Bubbly Laminar Flow

Static Performance of Smooth Liquid Annular Seals in the Transition and Turbulent Regimes

Performance of a Long Smooth Multiphase Pump Seal in Different Flow Regimes

Behaviors of a Hole-Pattern Seal With Wet-Gas

A Comparison of Experimental Results and Theoretical Predictions for the Rotordynamic Coefficients of Short (L/D = 1/6) Labyrinth Seals

Theory Versus Experiment for Short (L/D = 1/6) Honeycomb and Smooth Annular Pressure Seals

The Effects of Converging and Diverging Axial Taper on the Rotordynamic Coefficients of Liquid Annular Pressure Seals: Theory Versus Experiment

Theory Versus Experiment for the Effects of Pressure Ratio on the Performance of an Orifice-Compensated Hybrid Bearing

Test Results for the Static and Rotordynamic Characteristics of a Long ( L/D = 0.75) Smooth Seal in Two-Phase (Mainly Gas) Conditions With a 62-Bar Inlet Pressure

Clearance Effects on Spiral Vibrations due to Rubbing

Test Results for the Static and Rotordynamic Characteristics of a Long (L/D = 0.75) Smooth Seal in Two-Phase (Mainly Gas) Conditions With a 62-Bar Inlet Pressure

Effects of Clearance on the Performance of a Labyrinth Seal Under Wet-Gas Conditions

Experimental Study on the Performance of a See-Through Labyrinth Seal With Two-Phase, Mainly-Liquid Mixtures

Experimental Study on the Performance of a See-Through Labyrinth Seal With Two-Phase, Mainly-Liquid Mixtures

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