参考文献:1. D. Childs, / Turbomachinery rotordynamics: phenomena, modeling, and analysis, New York: Wiley-Interscience (1993). 2. T. W. Ha and B. S. Choe, Numerical simulation of rotordynamic coefficients for eccentric annular-type-plain-pump seal using CFD analysis, / Journal of Mechanical Science and Technology, 26(4) (2012) 1043-048. CrossRef 3. T. Hirano, Z. Guo and R. G. Kirk, Application of computational fluid dynamics analysis for rotating machinery-Part II: Labyrinth seal analysis, / Journal of Engineering for Gas Turbines and Power, 127(4) (2005) 820-26. CrossRef 4. J. J. Moore, D. L. Ransom and F. Viana, Rotordynamic force prediction of centrifugal compressor impellers using computational fluid dynamics, / Journal of Engineering for Gas Turbines and Power, 133(2) (2010) 042504-1-42504-10. 5. J. M. Patrick, A. Untaroiu, G. W. Houston and E. A. Paul, A computational fluid dynamics/bulk-flow hybrid method for determining rotordynamic coefficients of a annular gas seals, / Journal of Tribology, 134(2) (2012) 022202-22202-9. CrossRef 6. G. G. Hirs, A bulk-flow theory for turbulence in lubricant film, / Journal of Lubrication Technology, 95(2) (1993) 137-45. CrossRef 7. Alexander O. Pugachev and Ulrich Kleinhans Manuel Gaszner, Prediction of rotordynamic coefficients for short labyrinth gas seals using computational fluid dynamics, / Journal of Engineering for Gas Turbines and Power, 134(6) (2012) 062501-62501-10. CrossRef 8. M. Arghir and J. Frene, A bulk-flow analysis of static and dynamic characteristics of eccentric circumferentiallygrooved annular seals, / Journal of Tribology, 126(2) (2004) 316-25. CrossRef 9. Z. Yang, L. S. Andres and D. W. Childs, Dynamic force performance of annular gas seals at off-center conditions, / Tribology Transactions, 37(1) (1994) 33-2. CrossRef 10. C. C. Nelson and D. D. Nguyen, Analysis of eccentric annular incompressible seals: part 1-a new solution using fast Fourier transforms for determining hydrodynamic force, / Journal of Tribology, 110(2) (1988) 354-66. CrossRef 11. C. R. Alexander, D. W. Childs and Z. Yang, Theory versus experiment for the rotordynamic characteristics of a smooth annular gas seal at eccentric positions, / Journal of Tribology, 117(1) (1995) 148-52. CrossRef 12. O. R. Marqutte, D. W. Childs and L. S. Andres, Eccentricity effects on the rotordynamic coefficients of plain annular seals: theory versus experiment, / Journal of Tribology, 119(3) (1997) 443-48. CrossRef 13. M. Weatherwax and D. W. Childs, The influence of eccen tricity on the leakage and rotordynamic coefficients of a high pressure honeycomb annular gas seal, measurements versus predictions, / ASME Journal of Tribology, 125 (2002) 422-29. CrossRef 14. E. D. Thompson, Study force and dynamic coefficients in whirling and eccentric labyrinth seals using ANSYS-CFX, / Master of Science Thesis, Virginia Polytechnic Institute and State University, Virginia (2009). 15. Iwatsubo, Takuzo, Ishimaru and Hidetsugu, Consideration of whirl frequency ratio and effective damping coefficient of seal, / Journal of System Design and Dynamics, 4(1) (2010) 177-88. CrossRef 16. N. Zirkelback and L. S. Andres, Effect of frequency excitation on force coefficients of spiral groove gas seals, / Journal of Tribology, 121(4) (1999) 853-63. CrossRef 17. Nicolò Bachschmid, Paolo Pennacchi and Andrea Vania, Steam-whirl analysis in a high pressure cylinder of a turbo generator, / Mechanical Systems and Signal Processing, 22(1) (2008) 121-32. CrossRef 18. J. K. Scharrer, Theory versus experiment for the rotordynamic coefficients of labyrinth gas seals: part I-a two control volume model, / Journal of Vibration, Acoustics, Stress, and Reliability in Design, 110 (1988) 270-80. CrossRef
作者单位:Dan Sun (1) Jiangang Yang (2) Rui Guo (2) Wanfu Zhang (2) Yanting Ai (1)
1. Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion System, Shenyang Aerospace University, Shenyang, 110136, China 2. Faculty National Engineering Research Center of Turbo-Generator Vibration, Southeast University, Nanjing, 210096, China
ISSN:1976-3824
文摘
Static and dynamic characteristics of labyrinth seals are important in the prediction of the stability of turbomachinery. The paper presents an effective numerical method to predict the static and dynamic performance characteristics of seals at off-center conditions with different rotor whirling frequency. Modifications are introduced for the traditional turbulent bulk flow model to consider the circumferentially varying flow. A trigonometric series expansion method is used to approximate parameters such as pressure and velocity in seals cavity. Numerical simulations show that 8-0 series terms with 5-0 iterations are enough for the solution of this set of nonlinear equations. The resulting nonlinear algebraic equations can be solved rapidly. The analytical results are verified by comparison with the simulated CFD results. Parametric investigations showing the influence of eccentricity and whirling frequency on seals dynamics are also presented. The results show that the trigonometric series expansion based method gives an effective prediction of the static and dynamic characteristics of the eccentric seals.