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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

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Dara W. Childs, Jing Yang, Luis San Andrés, Jose M. Torres Rueda, James Alex Moreland
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2023, 145(3): 031005.
Paper No: GTP-22-1435
https://doi.org/10.1115/1.4055638
Published Online: December 5, 2022
View Articletitled, Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator
Open the PDF for Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator in another window
Topics: Leakage, Rotors, Stators, Stiffness, Damping, Pumps
Proceedings Papers

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

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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83504
https://doi.org/10.1115/GT2022-83504
View Paper titled, Negative Centering Forces of Wet-Gas Hole-Pattern Seals at Low Excitation Frequencies
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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

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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, V08AT22A023, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83499
https://doi.org/10.1115/GT2022-83499
View Paper titled, Leakage and Rotordynamic Performance of a Hole-Pattern Multiphase Pump Seal
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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

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Dara W. Childs, Jing Yang, Luis San Andrés, Jose M. Torres Rueda, J. Alex Moreland
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, V08AT22A004, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80073
https://doi.org/10.1115/GT2022-80073
View Paper titled, Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator
Open the PDF for Measured Leakage and Rotordynamic Force Coefficients for Two Liquid Annular Seal Configurations: Smooth-Rotor/Grooved-Stator Versus Grooved-Rotor/Smooth-Stator in another window
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

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Min Zhang, Dara W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2021, 143(11): 111007.
Paper No: GTP-21-1278
https://doi.org/10.1115/1.4051914
Published Online: September 27, 2021
View Articletitled, Effects of Increased Tooth Clearance on the Performance of a Labyrinth Seal With Oil-Rich Bubbly Laminar Flow
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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

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Min Zhang, Dara W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2021, 143(11): 111009.
Paper No: GTP-21-1280
https://doi.org/10.1115/1.4051952
Published Online: September 27, 2021
View Articletitled, Performance of a Long Smooth Multiphase Pump Seal in Different Flow Regimes
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Topics: Flow (Dynamics), Turbulence, Laminar flow, Pumps
Proceedings Papers

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

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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60108
https://doi.org/10.1115/GT2021-60108
View Paper titled, Performance of a Long Smooth Multiphase Pump Seal in Different Flow Regimes
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Topics: Flow (Dynamics), Pumps
Proceedings Papers

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

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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60106
https://doi.org/10.1115/GT2021-60106
View Paper titled, Effects of Increased Tooth Clearance on the Performance of a Labyrinth Seal With Oil-Rich Bubbly Laminar Flow
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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

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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58543
https://doi.org/10.1115/GT2021-58543
View Paper titled, Static Performance of Smooth Liquid Annular Seals in the Transition and Turbulent Regimes
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Topics: Turbulence, Flow (Dynamics), Reynolds number, Clearances (Engineering), Displacement, Flowmeters, Friction, Leakage, Pressure, Pressure drop
Journal Articles

Behaviors of a Hole-Pattern Seal With Wet-Gas

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Min Zhang, Dara W. Childs
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. December 2021, 143(12): 121807.
Paper No: TRIB-21-1156
https://doi.org/10.1115/1.4052254
Published Online: September 15, 2021
View Articletitled, Behaviors of a Hole-Pattern Seal With Wet-Gas
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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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC1991-0231
https://doi.org/10.1115/DETC1991-0231
View Paper titled, A Comparison of Experimental Results and Theoretical Predictions for the Rotordynamic Coefficients of Short (L/D = 1/6) Labyrinth Seals
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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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0191
https://doi.org/10.1115/DETC1993-0191
View Paper titled, Theory Versus Experiment for Short (L/D = 1/6) Honeycomb and Smooth Annular Pressure Seals
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Topics: Honeycomb structures, Pressure, Leakage, Friction, Rotors, Clearances (Engineering), Computers, Flat plates, Flow (Dynamics), Pipes
Proceedings Papers

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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC1995-0507
https://doi.org/10.1115/DETC1995-0507
View Paper titled, Theory Versus Experiment for the Effects of Pressure Ratio on the Performance of an Orifice-Compensated Hybrid Bearing
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Topics: Bearings, Pressure, Stress, Flow (Dynamics), High pressure (Physics), Hydrostatics, Navier-Stokes equations, Stiffness, Torque, Whirls
Proceedings Papers

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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC1995-0509
https://doi.org/10.1115/DETC1995-0509
View Paper titled, The Effects of Converging and Diverging Axial Taper on the Rotordynamic Coefficients of Liquid Annular Pressure Seals: Theory Versus Experiment
Open the PDF for The Effects of Converging and Diverging Axial Taper on the Rotordynamic Coefficients of Liquid Annular Pressure Seals: Theory Versus Experiment in another window
Topics: Pressure, Stiffness, Damping, Leakage, Clearances (Engineering), Rotation, Turbulence
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

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Dung L. Tran, Dara W. Childs, Hari Shrestha, Min Zhang
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2021, 143(4): 041010.
Paper No: GTP-20-1638
https://doi.org/10.1115/1.4049773
Published Online: February 26, 2021
View Articletitled, 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
Open the PDF for 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 in another window
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

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Dara W. Childs, Leland T. Jordan
Proc. ASME. DETC97, Volume 1B: 16th Biennial Conference on Mechanical Vibration and Noise, V01BT07A018, September 14–17, 1997
Publisher: American Society of Mechanical Engineers
Paper No: DETC97/VIB-4058
https://doi.org/10.1115/DETC97/VIB-4058
View Paper titled, Clearance Effects on Spiral Vibrations due to Rubbing
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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

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Dung L. Tran, Dara W. Childs, Hari Shrestha, Min Zhang
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A001, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14118
https://doi.org/10.1115/GT2020-14118
View Paper titled, 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
Open the PDF for 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 in another window
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

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Min Zhang, Dara W. Childs, Dung L. Tran, Hari Shrestha
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A007, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14267
https://doi.org/10.1115/GT2020-14267
View Paper titled, Effects of Clearance on the Performance of a Labyrinth Seal Under Wet-Gas Conditions
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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

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Min Zhang, Dara W. Childs
Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A008, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14268
https://doi.org/10.1115/GT2020-14268
View Paper titled, Experimental Study on the Performance of a See-Through Labyrinth Seal With Two-Phase, Mainly-Liquid Mixtures
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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

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Min Zhang, Dara W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2021, 143(1): 011015.
Paper No: GTP-20-1477
https://doi.org/10.1115/1.4048799
Published Online: January 4, 2021
View Articletitled, Experimental Study on the Performance of a See-Through Labyrinth Seal With Two-Phase, Mainly-Liquid Mixtures
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Topics: Flow (Dynamics), Fluids, Leakage, Pumps, Rotors, Stiffness, Pressure, Clearances (Engineering), Damping, Friction