Alloy Selection for Honeycomb Gas Path Seal Systems

Sporer, D.; Shiembob, L. T.

doi:10.1115/gt2004-53115

Cited by 18 publications

(11 citation statements)

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“…The mean thermal expansion coefficient, α mean , of Hastelloy X increases linearly with temperature from 14.8•10 −6 °C−1 at 200°C to 19.6•10 −6 °C−1 at 1250°C (Figure 3(a)). The measured values are little higher than reported in other studies [7,9,27].…”

Section: Resultscontrasting

confidence: 58%

Thermo-physical properties of Hastelloy X and Haynes 214 close to the melting range

kyzy

Völkl

Munz

et al. 2020

Materials Science and Technology

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The nickel-based superalloys Hastelloy X and Haynes 214 are widely used for honeycomb liners; however, thermo-physical properties at temperatures close to the melting range are poorly described in the literature. Based on the thermo-physical properties, endothermic effects between 550°C and 650°C have been observed that develop due to the formation of the short-range order in both alloys and in Haynes 214, in addition to the short-range order, an increase in the specific heat capacity due to the γ′-precipitation up to 950° was detected. At low and intermediate temperatures, the Hastelloy X is significantly better suited than the Haynes 214. At high temperatures the Haynes 214 is superior to the Hastelloy X due to the dissolution of the γ′-phase.

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Section: Resultscontrasting

confidence: 58%

Thermo-physical properties of Hastelloy X and Haynes 214 close to the melting range

kyzy

Völkl

Munz

et al. 2020

Materials Science and Technology

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“…The results demonstrated that aluminide-coated honeycomb tended to stick more to the seal fins during the rub, and the wear of the seal fin was uneven. Sporer et al [ 9 ] executed rubbing tests using a knife edge ring and a test blade to make contact with honeycomb. They mainly researched the abradability of honeycombs made of different materials by measuring knife edge wear.…”

Section: Introductionmentioning

confidence: 99%

The Wear of Seal Fins during High-Speed Rub between Labyrinth Seal Fins and Honeycomb Stators at Different Incursion Rates

Lü

et al. 2021

Materials

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Labyrinth seals as a noncontact sealing technology are widely used in aero-engine. To improve the efficiency of the aero-engine, the clearance between the rotor and stator must be as small as possible. However, the change of the clearance between the rotor and stator because of thermal expansion, vibration, mechanical loading may lead to undesirable high-speed rub, which will lead to the cracking of the seal fins. This paper focuses on the wear of the seal fin after the rub and presents the rubbing tests between seal fins and the metal honeycomb under rubbing speed of 380 m/s and incursion rates between 20 and 180 μm/s, with an incursion depth of 1500 μm and a temperature of 350 °C. The rubbing force and temperature were recorded, and the seal fins were checked by SEM and EDS. The results show that the wear mechanism of seal fins changed from oxidation wear and adhesive wear to delamination wear and then to metal wear with the increasing incursion rate. The axial cracks appeared on the worn surface of the seal fins due to the cracking of tribo-layers under periodic thermomechanical stress. The wear mechanism of the seal fin also has a great influence on the rubbing force and temperature.

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“…[8][9][10][11] Researchers are using innovative designs to improve the performance of metal seals, [12][13][14][15][16] and advanced materials are used to manufacture seals for extreme environments. 17,18 The combinations of polytetrafluoroethylene (PTFE) with other materials such as glass fibers, stainless steel, graphite, and bronze are used to develop reciprocating seals. [19][20][21] As an entangled fibrous function material, Metal rubber has been used to design novel seals that can apply in severe working conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on the friction and leakage of the metal rubber seal for reciprocating motion

Zhao

Yan

Dong

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Metal seals are widely used to solve the sealing problem in severe conditions. For reciprocating motion sealing problems, a metal rubber seal was proposed by combining the metal rubber (MR) materials with an axial opening C-shape jacket. In this research, to study the reciprocating sealing performance of metal rubber seals, a series of leaking experiments were carried out with a dynamic sealing test system. The friction force of the MR seal was measured under a variety of hydraulic pressure and velocity conditions. The static leakage principle of MR seals for axial sealing was presented based on Persson’s contact mechanics, and a circular gap leakage model was employed to describe the leakage during reciprocating motions. The static and dynamic leakage experiments of metal rubber seals for axial sealing were conducted, and the influence factors of leakage rates were analyzed.

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Alloy Selection for Honeycomb Gas Path Seal Systems

Cited by 18 publications

References 0 publications

Thermo-physical properties of Hastelloy X and Haynes 214 close to the melting range

Thermo-physical properties of Hastelloy X and Haynes 214 close to the melting range

The Wear of Seal Fins during High-Speed Rub between Labyrinth Seal Fins and Honeycomb Stators at Different Incursion Rates

Experimental research on the friction and leakage of the metal rubber seal for reciprocating motion

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