Cryogenic fluid damper seals operating close to the liquid-vapor region (near the critical point or slightly sub-cooled) are likely to develop a two-phase flow region which affects the seal performance and reliability. An all-liquid, liquid-vapor, and all-vapor, i.e., a “continuous vaporization” bulk flow model for prediction of the seal dynamic forced response is given in Part I. The numerical method of solution of the flow equations is detailed here. Computed predictions for static seal characteristics, leakage and axial pressure drop, correlate well with existing measurements for a gaseous nitrogen seal and a liquid nitrogen seal with two-phase at the seal exit plane. The effects of two-phase flow regimes on the dynamic force coefficients and stability of an oxygen damper seal are discussed. Fluid compressibility effects, particularly for mixtures with low mass content of vapor, are of utmost importance. Under these conditions, an increase on seal direct stiffness and reduction of whirl frequency ratio are shown to occur.
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April 1998
Research Papers
Analysis of Two-Phase Flow in Cryogenic Damper Seals—Part II: Model Validation and Predictions
Grigory L. Arauz,
Grigory L. Arauz
Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123
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Luis San Andre´s
Luis San Andre´s
Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123
Search for other works by this author on:
Grigory L. Arauz
Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123
Luis San Andre´s
Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123
J. Tribol. Apr 1998, 120(2): 228-233 (6 pages)
Published Online: April 1, 1998
Article history
Received:
December 3, 1996
Revised:
April 16, 1997
Online:
January 24, 2008
Connected Content
This is a companion to:
Analysis of Bending and Shearing of Tri-Layer Laminations for Solder Joint Reliability
Citation
Arauz, G. L., and San Andre´s, L. (April 1, 1998). "Analysis of Two-Phase Flow in Cryogenic Damper Seals—Part II: Model Validation and Predictions." ASME. J. Tribol. April 1998; 120(2): 228–233. https://doi.org/10.1115/1.2834414
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