Numerical investigations into the rubbing wear behavior of honeycomb seal

Yan, Xin; Wang, Haibo; He, Kun

doi:10.1007/s12206-023-0752-7

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…Computer simulations, including finite element (FE) and CFD analysis, have been widely used in studies to investigate the mechanical behaviors of the teeth and the fluid dynamics in the seal. Yan et al investigated the wear and deformation of labyrinth seals using FE analysis [10]. FE analysis has also been used to predict the aeroelastic stability of the straight-through labyrinth seal [11,12].…”

Section: Introductionmentioning

confidence: 99%

Oil-Sealing Performance Evaluation of Labyrinth Seal Using Combined Finite Element Analysis and Computational Fluid Dynamics

Park,

Son,

Choi

et al. 2023

Lubricants

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Mechanical seals, such as labyrinth seals, are typically installed at the turbine outlets to prevent oil leakage. However, these seals undergo deformation because of the vibrations of the rotor, even during normal turbine operating conditions, which may cause an increase in oil leakage. In this study, the oil leakage performance of three labyrinth seals with different types of seal teeth, narrow stainless teeth (Type 1), wide aluminum teeth fixed on the body (Type 2), and fixed wide aluminum movable teeth (Type 3), were evaluated using finite element (FE) and computational fluid dynamics (CFD) analyses. Three-dimensional FE models of the rotor and oil deflectors were developed, and the plastic deformation of the teeth of the labyrinth seals was predicted when the rotor impacted the sealing teeth during turbine operation. The oil leakage was predicted using CFD analysis. The results indicated that the Type 3 seal, including movable teeth, is beneficial in preventing leakage and tooth deformation compared with the other types. The Type 2 seal is advantageous because it results in a smaller increase in gap size and greater vena contracta effects than the Type 1 seal. The results of this study could be helpful when designing and selecting the teeth of a labyrinth seal.

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Section: Introductionmentioning

confidence: 99%

Oil-Sealing Performance Evaluation of Labyrinth Seal Using Combined Finite Element Analysis and Computational Fluid Dynamics

Park,

Son,

Choi

et al. 2023

Lubricants

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Investigations into rubbing wear behavior of honeycomb land against labyrinth fin with periodic-cell model

Yan,

Wang,

2024

Proceedings of the Institution of Mechanical Engineers, Part A:

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The periodic-cell model was proposed to simulate the successive contacts between the labyrinth fin and multiple honeycomb cells. With the experimental data, the finite-element-analysis (FEA) method with the periodic-cell model was validated. The effects of incursion parameters (i.e. incursion depth, incursion rate and sliding velocity) on the contact force, frictional temperature, material loss, and worn geometry of the honeycomb seal during the incursion process were studied. With the predicted worn geometry, the sealing performance degradation in the honeycomb seal was analyzed. The results showed that the proposed periodic-cell model has an excellent accuracy in predicting the wear behavior of honeycomb seal in rubbing events. The contact force between the honeycomb liner and labyrinth fin is pronounced especially at low sliding velocity and high incursion rate conditions, which increases the possibility of wear damage in the rotor part. At low sliding velocity and low incursion rate conditions, the frictional heat transferring to rotor part is increased, which increases the thermal stress near the contact region of the rotor part. As the clearance gap of honeycomb seal increases from 0.6 mm to 0.9 mm in the rubbing event, the leakage rate is increased by about 12%, and the carry-over effects downstream of the worn cells are increased.

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Numerical investigations into the rubbing wear behavior of honeycomb seal

Cited by 2 publications

References 30 publications

Oil-Sealing Performance Evaluation of Labyrinth Seal Using Combined Finite Element Analysis and Computational Fluid Dynamics

Oil-Sealing Performance Evaluation of Labyrinth Seal Using Combined Finite Element Analysis and Computational Fluid Dynamics

Investigations into rubbing wear behavior of honeycomb land against labyrinth fin with periodic-cell model

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