Thermomechanical phenomena and wear flow mechanisms during high speed contact of abradable materials

Thévenot, M.; Wagner, Vincent; Paris, Jean-Yves; Dessein, Gilles; Denape, Jean; Harzallah, Mahmoud; Brunet, A.; Chantrait, T.

doi:10.1016/j.wear.2019.01.094

Cited by 5 publications

(6 citation statements)

References 11 publications

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“…There were two rub positions as shown in Figure 6 . The rubbing forces and temperature were lower when the seal fins hit the slanted foil for its small contact area, which was also proved in [ 12 , 17 ]. The distance between the two adjacent double foil was 0.45 mm as shown in Figure 6 c. As a result, the rubbing forces and the temperature should have a large peak per 0.45 mm in axial incursion direction.…”

Section: Resultsmentioning

confidence: 52%

“… ( a ) The rubbing form in [ 17 ]; ( b ) the rubbing form in this paper. (V a : axial incursion rate; V r : radial incursion rate).…”

Section: Figurementioning

confidence: 99%

“…As a result, there is not only radial rub but also axial rub between the seal fins and the honeycomb. Axial rub tests between the seal fins and the honeycomb were performed in [ 17 ]. In their study, the seal fin with Al 2 O 3 TiO 2 coating was in contact with aluminum–silicon coating and honeycomb in axial direction.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of the Axial Rub Added in the Radial Rub on the Wear of the Seal Fins during the High Speed Rub of Labyrinth-Honeycomb Seal

Lü

et al. 2021

Materials

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Labyrinth-honeycomb seals are a state-of-the-art sealing technology commonly used in aero-engine interstage seal. The undesirable severe rub between the seal fins and the honeycomb due to the clearance change may induce the cracking of the seal fins. A pervious study investigated the wear of the seal fins at different radial incursion rates. However, due to the axial thrust and mounting clearance, the axial rub between the seal fins and the honeycomb may occur. Hence, this paper focuses on the influence of the axial rub added in the radial rub on the wear of the seal fins. The rub tests results, including rubbing forces and temperature, wear rate, worn morphology, cross-sectional morphology and energy dispersive spectroscopy results, are presented and discussed. Overall, the participation of the axial rub leads to higher rubbing forces, temperature, and wear rate. The tribo-layer on the seal fin is thicker and the cracks are more obvious at high axial incursion rate. These phenomena indicate the axial rub has a negative influence on the wear of the seal fins and should be avoided.

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Section: Resultsmentioning

confidence: 52%

“… ( a ) The rubbing form in [ 17 ]; ( b ) the rubbing form in this paper. (V a : axial incursion rate; V r : radial incursion rate).…”

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

The Influence of the Axial Rub Added in the Radial Rub on the Wear of the Seal Fins during the High Speed Rub of Labyrinth-Honeycomb Seal

Lü

et al. 2021

Materials

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“…As noted, in the case of either blades or fins incurring vertically into abradable systems, the wear mechanisms present tend to be a function of incursion rate [1,14,15]. In this case, the mechanism is one of adhesion of material to the fin, followed by fracture.…”

Section: Effect Of Incursion Speed and Fin Typementioning

confidence: 96%

Investigating Al-Si base abradable material removal mechanism with axial movement in labyrinth seal system

Zhang

Marshall

Lewis

2022

Wear

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“…Delebarre et al., 4–6 investigated the contact between a sealing fin and an Al-Si abradable material using a fully circumferential arrangement consisting of a single circular fin and abradable sample. Similarly, a continuous circular fin was also employed in Pychynski et al.’s, 7 Munz et al.’s 8 and Thévenot et al.’s 9 studies where the wear behaviour of a labyrinth-honeycomb seal system was investigated. Recently, Lu et al.…”

Section: Introductionmentioning

confidence: 99%

An investigation into the role of specimen geometry when undertaking tribological testing on seal fin components

Zhang

Marshall

Lewis

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Labyrinth seal systems are used in aeroengines to seal the clearance, the understanding of the wear mechanism of labyrinth seal system is necessary to achieve better sealing performance. In this work a series of tests are conducted on a high-speed test rig capable of fin tip speeds of 100 m/s. With force and temperature measurements recorded in each case, the influence of specimen geometry is investigated. Surface examination and debris analysis is also performed using microscopy post-test. The wear mechanism was found to be influenced by fin geometry. A discrete fin was observed to trigger a more efficient material removal mechanism at both incursion conditions. Where the fin segment and ring-shaped fin leading to increased temperatures and material smearing. The heat dissipate role of fin was also observed during test where longer contact time of fin and abradable gives better heat removal performance.

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Thermomechanical phenomena and wear flow mechanisms during high speed contact of abradable materials

Cited by 5 publications

References 11 publications

The Influence of the Axial Rub Added in the Radial Rub on the Wear of the Seal Fins during the High Speed Rub of Labyrinth-Honeycomb Seal

The Influence of the Axial Rub Added in the Radial Rub on the Wear of the Seal Fins during the High Speed Rub of Labyrinth-Honeycomb Seal

Investigating Al-Si base abradable material removal mechanism with axial movement in labyrinth seal system

An investigation into the role of specimen geometry when undertaking tribological testing on seal fin components

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