Leakage and whirl speed study in labyrinth seal using CFD

Labyrinth seal leakage and force estimates are important to the prediction of the stability of rotor-bearing-seal system. The leakage flow is predicted by ANYSYS-CFX in different radial clearance, pressure and whirl speed. It produced labyrinth seal force when the gas flow through the seal. The major goals in this paper were to calculate the rotordynamic labyrinth seals force using ANSYS-CFX, and to compare the labyrinth seal force magnitude under different whirl speed. In addition to the traditional method in mesh independence study, it use of small vortex determine whether mesh to meet the requirement. By the compare, the small vortex is also to describe mesh independence test.

[1]  R. G. Adams,et al.  Rub-Groove Width and Depth Effects on Flow Predictions for Straight-Through Labyrinth Seals , 2004 .

[2]  Effect of Rub-Groove Wall Angle on the Leakage of Abradable Stepped Labyrinth Seals , 2005 .

[3]  S. P. Asok,et al.  Neural network and CFD-based optimisation of square cavity and curved cavity static labyrinth seals , 2007 .

[4]  Weizhe Wang,et al.  Numerical Analysis of Leakage Flow Through Two Labyrinth Seals , 2007 .

[5]  Chisachi Kato,et al.  Prediction of Rotordynamic Forces in a Labyrinth Seal based on Three-Dimensional Turbulent Flow Computation , 1997 .

[6]  J. Jeffrey Moore,et al.  Three-Dimensional CFD Rotordynamic Analysis of Gas Labyrinth Seals , 2003 .

[7]  D. L. Rhode,et al.  Three-dimensional computations of rotordynamic force distributions in a labyrinth seal , 1993 .

[8]  S. R. Sobolik,et al.  Simulation of Subsonic Flow Through a Generic Labyrinth Seal , 1986 .

[9]  C. Rajakumar,et al.  Experimental Investigations of Rotor Whirl Excitation Forces Induced by Labyrinth Seal Flow , 1990 .

[10]  H. A. El-Gamal,et al.  Leakage from labyrinth seals under stationary and rotating conditions , 1996 .

[11]  R. G. Kirk,et al.  Influence of Leak Path Friction on Labyrinth Seal Inlet Swirl , 2009 .

[12]  R. G. Kirk.  Evaluation of Aerodynamic Instability Mechanisms for Centrifugal Compressors—Part II: Advanced Analysis , 1988 .

[13]  J. Wachter,et al.  Flow Induced Spring Coefficients of Labyrinth Seals for Application in Rotor Dynamics , 1980 .

[14]  R. J. Jenny,et al.  Prediction of Stiffness and Damping Coefficients for Centrifugal Compressor Labyrinth Seals , 1984 .

[15]  R. Gordon Kirk,et al.  Application of Computational Fluid Dynamics Analysis for Rotating Machinery—Part II: Labyrinth Seal Analysis , 2005 .

[16]  J. S. Alford,et al.  Protecting Turbomachinery From Self-Excited Rotor Whirl , 1965 .