Thermal Effects in Face Seals

1969 ◽  
Vol 91 (3) ◽  
pp. 434-437 ◽  
Author(s):  
H. J. Sneck
Keyword(s):  
Temperature Distribution ◽  
Turbulent Flow ◽  
Incompressible Fluid ◽  
Thermal Effects ◽  
Face Seal ◽  
Temperature Level ◽  
Face Seals ◽  
Laminar And Turbulent Flow ◽  
Parallel Surfaces

The laminar and turbulent flow of an incompressible fluid between the rotating parallel surfaces of a face seal is investigated analytically to determine the influence of conduction, convection, and dissipation on the temperature distribution. A method of estimating the general temperature level within the seal is suggested.

Reversed Flow in Face Seals

1969 ◽  
Vol 91 (3) ◽  
pp. 427-433 ◽  
Author(s):  
H. J. Sneck
Keyword(s):  
Turbulent Flow ◽  
Reversed Flow ◽  
Parallel Surface ◽  
External Fluid ◽  
Face Seals ◽  
Laminar And Turbulent Flow

The stream surfaces for laminar and turbulent flow in parallel surface seals are analytically determined for the cases where the fluid separates from one of the solid boundaries. These stream surfaces are used to determine when there is an exchange of external fluid across the seal land as well as the rate of these exchanges.

Numerical Modelling of High Pressure Gas Face Seals

2005 ◽  
Author(s):  
Se´bastien Thomas ◽  
Noe¨l Brunetie`re ◽  
Bernard Tournerie
Keyword(s):  
High Pressure ◽  
Thermal Effects ◽  
Operating Conditions ◽  
Compressible Fluids ◽  
Face Seal ◽  
Choked Flow ◽  
Exit Boundary ◽  
Face Seals ◽  
Gas Face Seal ◽  
Comparison With Experimental Data

A numerical model of face seals operating with compressible fluids at high pressure is presented. Inertia terms are included using an averaged method and thermal effects are considered. The real behaviour of gases at high pressure is taken into account. An original exit boundary condition is used to deal with choked flow. The model is validated by comparison with experimental data and analytical solutions. Finally, the influence of the operating conditions on the performance of a high-pressure gas face seal is analysed.

Squeeze Film Dynamics of Two-Phase Seals: Part II—Turbulent Flow

1994 ◽  
Vol 116 (3) ◽  
pp. 479-487 ◽  
Author(s):  
J. A. Yasuna ◽  
W. F. Hughes
Keyword(s):  
Turbulent Flow ◽  
Dynamic Model ◽  
Entire Range ◽  
Squeeze Film ◽  
Turbulent Regime ◽  
Two Phase ◽  
Thermal Transients ◽  
Face Seals ◽  
Laminar And Turbulent Flow

A previously developed dynamic model for two-phase face seals is extended to include turbulent flow. Thermal transients over the entire range of laminar and turbulent flow are considered for both parallel and tapered geometries. Inlet losses and choking are accounted for in the turbulent regime. Axial responses to perturbations from equilibrium are examined, and general criteria are discussed for predicting stable, unstable and bistable seal operation.

Numerical Modelling of High Pressure Gas Face Seals

2005 ◽  
Vol 128 (2) ◽  
pp. 396-405 ◽  
Author(s):  
Sébastien Thomas ◽  
Noël Brunetière ◽  
Bernard Tournerie
Keyword(s):  
High Pressure ◽  
Thermal Effects ◽  
Operating Conditions ◽  
Compressible Fluids ◽  
Face Seal ◽  
Choked Flow ◽  
Exit Boundary ◽  
Face Seals ◽  
Real Behavior ◽  
Gas Face Seal

An axisymetric numerical model of face seals operating with compressible fluids at high pressure is presented. Inertia terms are included using an averaged method and thermal effects are considered. The real behavior of gases at high pressure is taken into account. An original exit boundary condition is used to deal with choked flow. The model is validated by comparison with experimental data and analytical solutions. Finally, the influence of the operating conditions on the performance of a high-pressure gas face seal is analyzed. It is shown that when the flow is choked, the mass flow rate is reduced and the behavior of the seal becomes unstable.

Microasperity Lubrication

1968 ◽  
Vol 90 (2) ◽  
pp. 351-355 ◽  
Author(s):  
J. N. Anno ◽  
J. A. Walowit ◽  
C. M. Allen
Keyword(s):  
Experimental Data ◽  
Applied Load ◽  
Direct Evidence ◽  
Thrust Bearing ◽  
Circular Cylinders ◽  
Face Seal ◽  
Lubricant Film Thickness ◽  
Face Seals ◽  
Parallel Surfaces ◽  
Thermal Technique

Large load-supporting capability has been observed between parallel surfaces of a rotary-shaft face-seal when one of the surfaces contains microasperities in the form of circular cylinders with 12 × 10−3-in. dia and 100-microin. height, covering about one third of the surface. A theory is presented in which the load support is attributed to small tills on the tops of the asperities. The experimental data of lubricant film thickness versus applied load are correlated well by this theory assuming an average till of 0.86 microin. for the 12-mil-dia asperities investigated. Torque data obtained by a thermal technique are also correlated by this theory in the form of a plot of coefficient of friction versus Hersey number. Although direct evidence of the presence of small tilts on the asperity tops is lacking, it has been demonstrated that the load support is even further increased when the tops are purposely rounded. It is concluded that the theory developed correlates well the experimental data and, further, that the use of planned microasperities is an effective method for lubricating the parallel surfaces of face seals and thrust-bearing surfaces.

Laminar and turbulent flow in water

2010 ◽  
Vol 45 (3) ◽  
pp. 288-291 ◽  
Author(s):  
H G Riveros ◽  
D Riveros-Rosas
Keyword(s):  
Turbulent Flow ◽  
Laminar And Turbulent Flow
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