Computational Analysis of Sealing and Stability of a Deformable Floating and Fixed Rings of an Annular Seal | Journal of Engineering Sciences

Computational Analysis of Sealing and Stability of a Deformable Floating and Fixed Rings of an Annular Seal

Author(s): Zahorulko A.1*, Borsuk S.1, Peczkis G.2

1 Sumy State University, 2, Rymskogo-Korsakova St., 40007 Sumy, Ukraine;
2 Silesian University of Technology, 2A, Akademicka St., 44-100 Gliwice, Poland

*Corresponding Author’s Address: [email protected]

Issue: Volume 9, Issue 1 (2022)

Submitted: March 21, 2022
Accepted for publication: June 12, 2022
Available online: June 16, 2022

Zahorulko, A., Borsuk, S., Peczkis, G. (2022). Computational analysis of sealing and stability of a deformable floating and fixed rings of an annular seal. Journal of Engineering Sciences, Vol. 9(1), pp. D20-D29, doi: 10.21272/jes.2022.9(1).d4

DOI: 10.21272/jes.2022.9(1).d4

Research Area:  MECHANICAL ENGINEERING: Dynamics and Strength of Machines

Abstract. Solving the hydroelastic problem by using Ansys System Coupling (Mechanical and CFX) for floating and fixed rings of a deformable annular seal made it possible to analyze the influence of the cylindrical shell thickness, the inlet and outlet edge dimensions, inlet pressure, and shaft radial displacement on the hydrostatic pressure distribution and the clearance value on length, leakages, stress-strain state, and radial force. The analysis of static stability at an inlet pressure of 10 MPa for the basic seal design showed that the static radial force in the range of radial movements of the shaft from 0 to 50% of the clearance is centering, even though the inlet part of the seal clearance has a confusor, and the outlet part has diffuser form. However, the dynamic coefficients of the fixed sealing ring have a negative value of direct stiffness but positive values of direct and cross-coupled damping and cross-coupled stiffness. Verifying computational 2D and 3D models with experimental results from the literature showed that the maximum relative error does not exceed 10.7% for the hydrostatic pressure, 18% for the clearance, and 8.6% for the leakage value. Simultaneously, according to the trend, all calculated dependencies are identical to the experimental results.

Keywords: deformable annular seal, clearance, hydroelastic problem, sealing, stability.


  1. Martsynkovskyy V.A. (2005). Hermomechanics, its role in ensuring the efficiency and environmental friendliness of pumping and compressor equipment. Bulletin of Sumy State University, Series “Technical Sciences”, Vol. 1(73), pp. 5–10.
  2. Kamal, M. M. (1968). A high pressure clearance seal. ASME. J. of Lubrication Tech., Vol. 90(2), pp. 412–416, doi: 10.1115/1.3601575.
  3. Pick, R. J., Harris, H. D. (1980). Morrison and parry seals for water pressures up to 345 MPa. J. Pressure Vessel Technol., Vol. 102(1), pp. 84–89, doi: 10.1115/1.3263306.
  4. Khvorost, V. A., Pryadko, S. V., Mel’nik, V. A. et al. (1987). Method of calculating floating seals. Vestn. Mashinostr., Vol. 6, pp. 23–25.
  5. Kibets, Yu.A. (1988). Development of methods for calculating deformable annular seals of turbopump units. CSc. thesis. Kharkiv, Ukraine.
  6. Arghir M. (2015). Experimental study of floating ring annular seals using high-speed optical techniques and mark tracking methods. CFM 2015 – 22ème Congrès Français de Mécanique. Lyon, France.
  7. Li, G., Zhang, Q., Huang, E., Lei, Z., Wu, H., Xu, G. (2019). Leakage performance of floating ring seal in cold/hot state for aero-engine. Chinese J Aeronaut, Vol. 32, pp. 2085–2094, doi: 10.1016/j.cja.2019.03.004.
  8. Ha, T.-W., Lee, Y.-B., Kim, C.-H. (2002). Leakage and rotordynamic analysis of a high pressure floating ring seal in the turbo pump unit of a liquid rocket engine. Tribol Int, Vol. 35, pp. 153–61, doi: 10.1016/S0301-679X(01)00110-4.
  9. Duan, W., Chu, F., Kim, C.-H., Lee, Y.-B. (2007). A bulk-flow analysis of static and dynamic characteristics of floating ring seals. Tribol Int, Vol. 40, pp. 470–480, doi: 10.1016/j.triboint.2006.04.010.
  10. Xie, Z., Zhu, W. (2022). An investigation on the lubrication characteristics of floating ring bearing with consideration of multi-coupling factors. Mech Syst Signal Process, Vol. 162, 108086, doi: 10.1016/j.ymssp.2021.108086.
  11. Zhang, Y., Wang, W., Wei, D., Wang, G., Xu, J., Liu, K. (2022). Coupling analysis of tribological and dynamical behavior for a thermal turbulent fluid lubricated floating ring bearing-rotor system at ultra-high speeds. Tribol Int, Vol. 165, 107325, doi; 10.1016/j.triboint.2021.107325.
  12. Novotný, P., Škara, P., Hliník, J. (2018). The effective computational model of the hydrodynamics journal floating ring bearing for simulations of long transient regimes of turbocharger rotor dynamics. Int J Mech Sci, Vol. 148, pp. 611–619, doi: 10.1016/j.ijmecsci.2018.09.025.
  13. Workbench User’s Guide, Release 18.2, ANSYS Inc., 2017.
  14. Zahorulko, A. V., Gerasimiva, K. P., Altyntsev, E. I., Hudkov, S. N. (2009). Computer modeling of the spatial flow in the annular channel of the annular seal-bearing. Eastern European Journal of Advanced Technologies, Vol. 6/7(42), pp. 22–26.

Full Text

© 2014-2024 Sumy State University
"Journal of Engineering Sciences"
ISSN 2312-2498 (Print), ISSN 2414-9381 (Online).
All rights are reserved by SumDU