Performance Analysis of Hydrodynamic Finger Seal with Herringbone-Grooved Structure

Abstract:

Three dimensional solid-fluid interaction numerical analysis models of both the finger seal with herringbone-grooved pad and the finger seal with herringbone-grooved rotor were established in order to study the performance of hydrodynamic finger seal. The models investigated fluid radial under pad force and fluid leakage as a function of both the rotor speed and the high- to low-pressure differential. It was shown that the finger seal with herringbone-grooved structure in pad or in rotor could bring lift force under the finger pad so as to keep the finger seal in non-contacting status. For the two types of finger seal, their load carrying ability and fluid leakage varying with the pressure differential were almost same. In the same velocity of rotor surface, the load carrying capacity of the finger seal with herringbone- grooved rotor was greater and the leakage was less than that of the finger seal with herringbone-grooved pad respectively. With the conditions of rotor structure allowing, it is suggested to select the finger seal with herringbone-grooved rotor first for designing the hydrodynamic finger seal with herringbone-grooved structure.

• Periodical: Applied Mechanics and Materials (Volumes 121-126)
• Pages: 1039-1043
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.121-126.1039
• Online since: October 2011
• Authors: Su Hua, Xi Chun Wang
• Keywords: Finger Seal, Herringbone-Grooved Pad, Herringbone-Grooved Rotor, Leakage, Load-Carrying Capacity, Solid-Fluid Interaction Simulation

References

[1] M.J. Braun, H.M. Pierson and V.V. Kudriavtsev: STLE Annual Meeting, New York, NY(2003), pp.1-23.

[2] M.J. Braun, H. M. Pierson, D. Deng et al.: NASA/CP—2004-212963/VOL1(2004), pp.175-212.

[3] P.P. Galimutti, J. T. Sawicki, and D. P. Fleming: Proceedings of ASME Turbo Expo 2009: Power for Land, Sea and Air, Orlando, Florida, USA (2009), pp.1-10.

[4] G. Yue, Q. Zheng and R. Zhu: Proceedings of ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, Germany (2008) , pp.1-9.

[5] D. P. Fleming: NASA/TM—2006-214333(2006), pp.1-13.

[6] M.P. Proctor , I.R. Delgado: NASA/TM—2008-215475(2008) , pp.1-23.