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Proceedings Papers

Experimental and Theoretical Comparison of Two Swirl Brake Designs

K. K. Nielsen, D. W. Childs, C. M. Myllerup
Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A041, May 8–11, 2000
Publisher: American Society of Mechanical Engineers
Paper No: 2000-GT-0399
https://doi.org/10.1115/2000-GT-0399
View Paper titled, Experimental and Theoretical Comparison of Two Swirl Brake Designs
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Topics: Brakes, Computational fluid dynamics, Design, Engines, Fuels, High pressure (Physics), Modeling, Separation (Technology), Space vehicles, Vortices
Proceedings Papers

Experimental Rotordynamic Coefficient Results for a Load-on-Pad Flexible-Pivot Tilting-Pad Bearing With Comparisons to Predictions From Bulk-Flow and Reynolds Equation Models

L. E. Rodriguez, D. W. Childs
Proc. ASME. TRIB2004, ASME/STLE 2004 International Joint Tribology Conference, Parts A and B, 529-537, October 24–27, 2004
Publisher: American Society of Mechanical Engineers
Paper No: TRIB2004-64042
https://doi.org/10.1115/TRIB2004-64042
View Paper titled, Experimental Rotordynamic Coefficient Results for a Load-on-Pad Flexible-Pivot Tilting-Pad Bearing With Comparisons to Predictions From Bulk-Flow and Reynolds Equation Models
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Topics: Bearings, Flow (Dynamics), Stress, Stiffness, Excitation, Inertia (Mechanics), Fluids, Degrees of freedom, Dynamics (Mechanics), Eigenvalues
Proceedings Papers

Understanding Friction Factor Behavior in Liquid Annular Seals With Deliberately Roughened Surfaces: Roughness Geometric Characteristics Defining Flow Resistance

L. A. Villasmil, D. W. Childs, H. C. Chen
Proc. ASME. GT2006, Volume 3: Heat Transfer, Parts A and B, 1571-1579, May 8–11, 2006
Publisher: American Society of Mechanical Engineers
Paper No: GT2006-91046
https://doi.org/10.1115/GT2006-91046
View Paper titled, Understanding Friction Factor Behavior in Liquid Annular Seals With Deliberately Roughened Surfaces: Roughness Geometric Characteristics Defining Flow Resistance
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Topics: Flow (Dynamics), Friction, Surface roughness, Leakage, Clearances (Engineering), Honeycomb structures, Machinery, Centrifugal pumps, Compressors, Design
Journal Articles

Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part II: Smooth and Honeycomb Geometries

M. P. Dawson, Senior Engineer, D. W. Childs, Jordan Professor of Mechanical Engineering
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 963–970.
https://doi.org/10.1115/1.1478076
Published Online: September 24, 2002
View Article titled, Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part II: Smooth and Honeycomb Geometries
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Topics: Honeycomb structures, Pressure
Journal Articles

Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part I: Test Facility and Apparatus

M. P. Dawson, Senior Engineer, D. W. Childs, Jordan Professor of Mechanical Engineering, C. G. Holt, Research Assistant, S. G. Phillips, Research Engineer
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 958–962.
https://doi.org/10.1115/1.1478075
Published Online: September 24, 2002
View Article titled, Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part I: Test Facility and Apparatus
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Topics: Pressure, Stators, Test facilities, Excitation, Rotors, Annulus
Journal Articles

Measurements of Rotordynamic Coefficients of Hybrid Bearings With (a) a Plugged Orifice, and (b) a Worn Land Surface

F. Laurant, D. W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2002, 124(2): 363–368.
https://doi.org/10.1115/1.1403461
Published Online: March 26, 2002
View Article titled, Measurements of Rotordynamic Coefficients of Hybrid Bearings With (a) a Plugged Orifice, and (b) a Worn Land Surface
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Topics: Bearings, Stiffness, Pressure, Damping, Wear
Journal Articles

Experimental and Theoretical Comparison of Two Swirl Brake Designs

K. K. Nielsen, D. W. Childs, C. M. Myllerup
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. April 2001, 123(2): 353–358.
https://doi.org/10.1115/1.1354140
Published Online: February 1, 2000
View Article titled, Experimental and Theoretical Comparison of Two Swirl Brake Designs
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Topics: Brakes, Flow (Dynamics), Rotors, Design
Journal Articles

Experimental Rotordynamic Coefficient Results for (a) a Labyrinth Seal With and Without Shunt Injection and (b) a Honeycomb Seal

E. A. Soto, D. W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 1999, 121(1): 153–159.
https://doi.org/10.1115/1.2816303
Published Online: January 1, 1999
View Article titled, Experimental Rotordynamic Coefficient Results for (a) a Labyrinth Seal With and Without Shunt Injection and (b) a Honeycomb Seal
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Topics: Honeycomb structures, Rotation, Pressure, Compressors, Damping, Leakage, Rotors, Diffusers, Flow control, Fluid density
Journal Articles

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

P. Mosher, D. W. Childs
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. October 1998, 120(4): 930–936.
https://doi.org/10.1115/1.2893922
Published Online: October 1, 1998
View Article 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
Journal Articles

A Comparison of Experimental Rotordynamic Coefficients and Leakage Characteristics Between Hole-Pattern Gas Damper Seals and a Honeycomb Seal

Z. Yu, D. W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 1998, 120(4): 778–783.
https://doi.org/10.1115/1.2818467
Published Online: October 1, 1998
View Article titled, A Comparison of Experimental Rotordynamic Coefficients and Leakage Characteristics Between Hole-Pattern Gas Damper Seals and a Honeycomb Seal
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Topics: Dampers, Honeycomb structures, Leakage, Damage, Damping, Design, Drilling, Manufacturing, Plastics, Pressure
Journal Articles

Closure to “Discussion of ‘The Acoustic Influence of Cell Depth on the Rotordynamic Characteristics of Smooth-Rotor/Honeycomb-Stator Annular Gas Seals’” (1997, ASME J. Eng. Gas Turbines Power, 119, p. 956)

G. F. Kleynhans, D. W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Discussions
J. Eng. Gas Turbines Power. October 1997, 119(4): 956–957.
https://doi.org/10.1115/1.2817081
Published Online: October 1, 1997
View Article titled, Closure to “Discussion of ‘The Acoustic Influence of Cell Depth on the Rotordynamic Characteristics of Smooth-Rotor/Honeycomb-Stator Annular Gas Seals’” (1997, ASME J. Eng. Gas Turbines Power, 119, p. 956)
Open the PDF for Closure to “Discussion of ‘The Acoustic Influence of Cell Depth on the Rotordynamic Characteristics of Smooth-Rotor/Honeycomb-Stator Annular Gas Seals’” (1997, ASME J. Eng. Gas Turbines Power, 119, p. 956) in another window
Topics: Acoustics, Gas turbines, Honeycomb structures, Rotors, Stators
Journal Articles

The Acoustic Influence of Cell Depth on the Rotordynamic Characteristics of Smooth-Rotor/Honeycomb-Stator Annular Gas Seals

G. F. Kleynhans, D. W. Childs
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 1997, 119(4): 949–956.
https://doi.org/10.1115/1.2817079
Published Online: October 1, 1997
View Article titled, The Acoustic Influence of Cell Depth on the Rotordynamic Characteristics of Smooth-Rotor/Honeycomb-Stator Annular Gas Seals
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Topics: Acoustics, Honeycomb structures, Rotors, Stators, Transfer functions, Damping, Rotordynamics, Stiffness, Algorithms, Capacitance
Journal Articles

Eccentricity Effects on the Rotordynamic Coefficients of Plain Annular Seals: Theory Versus Experiment

O. R. Marquette, D. W. Childs, L. San Andres
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. July 1997, 119(3): 443–447.
https://doi.org/10.1115/1.2833515
Published Online: July 1, 1997
View Article titled, Eccentricity Effects on the Rotordynamic Coefficients of Plain Annular Seals: Theory Versus Experiment
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Topics: Bearings, Equilibrium (Physics), Inertia (Mechanics), Leakage, Pressure drop, Pumps, Signal to noise ratio
Journal Articles

Closure to “Discussion of ‘Eccentricity Effects on the Rotordynamic Coefficients of Plain Annular Seals: Theory Versus Experiment’” (1997, ASME J. Tribol., 119, pp. 447–448)

O. R. Marquette, D. W. Childs, L. San Andres
Journal: Journal of Tribology
Publisher: ASME
Article Type: Discussions
J. Tribol. July 1997, 119(3): 448.
https://doi.org/10.1115/1.2833517
Published Online: July 1, 1997
View Article titled, Closure to “Discussion of ‘Eccentricity Effects on the Rotordynamic Coefficients of Plain Annular Seals: Theory Versus Experiment’” (1997, ASME J. Tribol., 119, pp. 447–448)
Open the PDF for Closure to “Discussion of ‘Eccentricity Effects on the Rotordynamic Coefficients of Plain Annular Seals: Theory Versus Experiment’” (1997, ASME J. Tribol., 119, pp. 447–448) in another window
Journal Articles

Discussion: “Roughness Influence on Turbulent Flow Through Annular Seals Including Inertia Effects” (Lucas, V., Bonneau, O., and Freˆne, Jean, 1996, ASME J. Tribol., 118, pp. 175–182)

D. W. Childs
Journal: Journal of Tribology
Publisher: ASME
Article Type: Discussions
J. Tribol. October 1996, 118(4): 927.
https://doi.org/10.1115/1.2831630
Published Online: October 1, 1996
View Article titled, Discussion: “Roughness Influence on Turbulent Flow Through Annular Seals Including Inertia Effects” (Lucas, V., Bonneau, O., and Freˆne, Jean, 1996, ASME J. Tribol., 118, pp. 175–182)
Open the PDF for Discussion: “Roughness Influence on Turbulent Flow Through Annular Seals Including Inertia Effects” (Lucas, V., Bonneau, O., and Freˆne, Jean, 1996, ASME J. Tribol., 118, pp. 175–182) in another window
Topics: Inertia (Mechanics), Surface roughness, Turbulence
Journal Articles

Experimental Leakage and Rotordynamic Results for Helically Grooved Annular Gas Seals

D. W. Childs, A. J. Gansle
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 1996, 118(2): 389–393.
https://doi.org/10.1115/1.2816601
Published Online: April 1, 1996
View Article titled, Experimental Leakage and Rotordynamic Results for Helically Grooved Annular Gas Seals
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Topics: Leakage, Stators, Honeycomb structures, Flow (Dynamics), Fluids, Stiffness, Whirls, Brakes, Pressure, Rotation
Journal Articles

An Extended Three-Control-Volume Theory for Circumferentially-Grooved Liquid Seals

O. R. Marquette, D. W. Childs
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 1996, 118(2): 276–285.
https://doi.org/10.1115/1.2831296
Published Online: April 1, 1996
View Article titled, An Extended Three-Control-Volume Theory for Circumferentially-Grooved Liquid Seals
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Topics: Centrifugal pumps, Damping, Flow (Dynamics), Leakage, Leakage flows, Momentum, Pumps, Stiffness
Journal Articles

Thermohydrodynamic Analysis of Process-Liquid Hydrostatic Journal Bearings in Turbulent Regime, Part II: Numerical Solution and Results

Zhou Yang, L. San Andres, D. W. Childs
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Technical Papers
J. Appl. Mech. September 1995, 62(3): 679–684.
https://doi.org/10.1115/1.2896000
Published Online: September 1, 1995
View Article titled, Thermohydrodynamic Analysis of Process-Liquid Hydrostatic Journal Bearings in Turbulent Regime, Part II: Numerical Solution and Results
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Topics: Hydrostatics, Journal bearings, Thermohydrodynamics, Turbulence, Bearings, Temperature, Flow (Dynamics), Stiffness, Damping, Fluids
Journal Articles

Thermohydrodynamic Analysis of Process-Liquid Hydrostatic Journal Bearings in Turbulent Regime, Part I: The Model and Perturbation Analysis

Zhou Yang, L. San Andres, D. W. Childs
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Technical Papers
J. Appl. Mech. September 1995, 62(3): 674–678.
https://doi.org/10.1115/1.2895999
Published Online: September 1, 1995
View Article titled, Thermohydrodynamic Analysis of Process-Liquid Hydrostatic Journal Bearings in Turbulent Regime, Part I: The Model and Perturbation Analysis
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Topics: Hydrostatics, Journal bearings, Thermohydrodynamics, Turbulence, Bearings, Flow (Dynamics), Fluid films, Fluids, Temperature, Compressibility
Journal Articles

Theory Versus Experiment for the Rotordynamic Characteristics of a Smooth Annular Gas Seal at Eccentric Positions

C. R. Alexander, D. W. Childs, Z. Yang
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. January 1995, 117(1): 148–152.
https://doi.org/10.1115/1.2830591
Published Online: January 1, 1995
View Article titled, Theory Versus Experiment for the Rotordynamic Characteristics of a Smooth Annular Gas Seal at Eccentric Positions
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Topics: Damping, Flow (Dynamics), Fluids, Pressure, Rotors, Stability, Stiffness, Whirls