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TECHNICAL PAPERS: Gas Turbines: Heat Transfer and Turbomachinery

Disintegration of Oil Films Emerging From Radial Holes in a Rotating Cylinder

[+] Author and Article Information
A. Glahn, M. F. Blair

United Technologies Research Center, 411 Silver Lane, M/S 129-19, East Hartford, CT 06108

K. L. Allard

Pratt & Whitney, 400 Main Street, East Hartford, CT 06108

S. Busam, O. Schäfer, S. Wittig

Institut für Thermische Strömungsmaschinen, Universität Karlsruhe, Kaiserstr. 12, Karlsruhe 76128, Germany

J. Eng. Gas Turbines Power 125(4), 1011-1020 (Nov 18, 2003) (10 pages) doi:10.1115/1.1586311 History: Received December 01, 2000; Revised March 01, 2001; Online November 18, 2003
Copyright © 2003 by ASME
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References

Zimmermann, H., Kammerer, A., Fischer, R., and Rebhahn, D., 1991. “Two-Phase Flow Correlations in Air/Oil Systems of Aero Engines,” ASME Paper No. 91-GT-54.
Wittig,  S., Glahn,  A., and Himmelsbach,  J., 1994, “Influence of High Rotational Speeds on Heat Transfer and Oil Film Thickness in Aero Engine Bearing Chambers,” ASME J. Eng. Gas Turbines Power, 116(2), pp. 395–401.
Chew, J., 1996, “Analysis of the Oil Film on the Inside Surface of an Aero-Engine Bearing Chamber Housing,” ASME Paper No. 96-GT-300.
Glahn,  A., and Wittig,  S., 1996, “Two-Phase Air Oil Flow in Aero Engine Bearing Chambers—Characterization of Oil Film Flows,” ASME J. Eng. Gas Turbines Power, 118(3), pp. 578–583.
Glahn, A., Busam, S., and Wittig, S., 1997, “Local and Mean Heat Transfer Coefficients along the Internal Housing Walls of Aero Engine Bearing Chambers,” ASME Paper No. 97-GT-261.
Busam, S., Glahn, A., and Wittig, S., 1999, “Internal Bearing Chamber Wall Heat Transfer as a Function of Operating Conditions and Chamber Geometry,” ASME Journal of Engineering for Gas Turbines and Power, accepted for publication.
Glahn,  A., and Wittig,  S., 1999, “Two-Phase Air Oil Flow in Aero Engine Bearing Chambers—Assessment of an Analytical Prediction Method for the Internal Wall Heat Transfer,” Int. J. Rotating Mach., 5(3), pp. 155–165.
Zaidi, S. H., Ishaq G., Aroussi A., and Azzopardi, B. J. 1998. “Two-Phase Flow Study Around a Rotating Liquid Film Using Laser Techniques,” Proceedings of the VSJ-SPIE98, Dec. 6–9, Yokohama, Japan.
Glahn,  A., Kurreck,  M., Willmann,  M., and Wittig,  S., 1996, “Feasibility Study on Oil Droplet Flow Investigations Inside Aero Engine Bearing Chambers—PDPA Techniques in Combination with Numerical Approaches,” ASME J. Eng. Gas Turbines Power, 118(4), pp. 749–755.
Glahn, A., Busam, S., Blair, M. F., Allard, K. L., and Wittig, S., 2000, “Droplet Generation by Disintegration of Oil Films at the Rim of a Rotating Disk,” ASME Paper No. 2000-GT-279.
Bachalo,  W. D., and Houser,  M. J., 1984, “Phase Doppler Spray Analyzer for Simultaneous Measurements of Drop Size and Velocity Distributions,” Opt. Eng., 23, pp. 583–590.
Willmann,  M., Glahn,  A., and Wittig,  S., 1997, “Phase-Doppler Particle Sizing with Off-Axis Angles in Alexander’s Darkband,” Part. Part. Syst. Charact., 14(3), pp. 122–128.
Hinze, J. O., and Milborn, H., 1950, “Atomization of Liquids by Means of a Rotating Cup,” Journal of Applied Mechanics, pp. 145–153.
Lefebvre, A. H., 1989, Atomization and Sprays, Hemisphere, Washington, DC.

Figures

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Rotating cylinder test rig
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Test matrix for droplet size and velocity measurement. (a) Configuration 1A: DH=3⋅10−3 m,(L/D)H=1.67. (b) Configuration 1B: DH=9⋅10−3 m,(L/D)H=0.56. (c) Nomenclature.
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Oil atomization at a rotating radial hole (DH=9⋅10−3 m); (a) sheet separation, (b) droplet trajectory
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N=3450 rpm,q=1.39⋅10−5 m3/s,L/DH=1.67,ΔR/DC=0.077. Axial profiles of (a) mean diameters, (b) cumulative diameters, (c) mean velocities and velocity range.
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N=3450 rpm,q=1.39⋅10−5 m3/s,L/DH=1.67,Z/DC=0.0. Radial profiles of (a) mean diameters, (b) cumulative diameters, (c) Mean velocities and velocity range.
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N=3450 rpm, L/DH=1.67,Z/DC=0.0. Effect of flow rate on (a) droplet velocities based on rim speed, (b) flow angles.
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q=5.44⋅10−5 m3/s,L/DH=0.56,Z/DC=0.0. Effect of rotational speed on (a) absolute droplet velocities, (b) droplet velocities based on rim speed, (c) flow angles
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Deceleration of droplets at various rotational speeds
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Arithmetic mean droplet diameter versus nondimensional volumetric flow rate
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Mean diameter based on oil film thickness at the rim of the hole/disk
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Standard deviation of droplet diameter distribution
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Droplet velocity after completed disintegration
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Droplet flow angle after completed disintegration

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