Detail publikačního výsledku

Labyrinth seal design for space applications

POUZAR, J.; KOŠŤÁL, D.; WESTERBERG, L.; NYBERG, E.; KŘUPKA, I.

Originální název

Labyrinth seal design for space applications

Anglický název

Labyrinth seal design for space applications

Druh

Článek WoS

Originální abstrakt

Labyrinth seals, extensively used in space applications, serve to prevent the loss of liquid lubricants and shield satellite subsystems from contamination. These seals are essential for the reliable functioning of bearings and for protecting satellite subsystems from contamination. This study compares analytical predictions of lubricant loss against experimental measurements and computer simulations to optimize labyrinth seal configurations. Analytical models tend to overestimate mass loss by 5-8 times compared to experimental data, indicating limited reliability for complex seal geometries. Simulations using MolFlow+ and COMSOL Multiphysics align closely with experimental results, providing accurate mass loss predictions. Key findings highlight that labyrinth length, width, and surface roughness are critical factors in minimizing evaporative mass loss. Notably, stepped labyrinth seals with relief grooves and optimized step positioning effectively reduce molecular beaming effects and improve sealing performance compared to straight geometries. Effective sealing not only reduces mission failures but also helps to minimize space debris, thereby promoting safer satellite missions.

Anglický abstrakt

Labyrinth seals, extensively used in space applications, serve to prevent the loss of liquid lubricants and shield satellite subsystems from contamination. These seals are essential for the reliable functioning of bearings and for protecting satellite subsystems from contamination. This study compares analytical predictions of lubricant loss against experimental measurements and computer simulations to optimize labyrinth seal configurations. Analytical models tend to overestimate mass loss by 5-8 times compared to experimental data, indicating limited reliability for complex seal geometries. Simulations using MolFlow+ and COMSOL Multiphysics align closely with experimental results, providing accurate mass loss predictions. Key findings highlight that labyrinth length, width, and surface roughness are critical factors in minimizing evaporative mass loss. Notably, stepped labyrinth seals with relief grooves and optimized step positioning effectively reduce molecular beaming effects and improve sealing performance compared to straight geometries. Effective sealing not only reduces mission failures but also helps to minimize space debris, thereby promoting safer satellite missions.

Klíčová slova

Vacuum evaporation; Molecular flow; Labyrinth seals; Contamination; Liquid lubricants; Space tribology

Klíčová slova v angličtině

Vacuum evaporation; Molecular flow; Labyrinth seals; Contamination; Liquid lubricants; Space tribology

Autoři

POUZAR, J.; KOŠŤÁL, D.; WESTERBERG, L.; NYBERG, E.; KŘUPKA, I.

Vydáno

14.02.2025

Nakladatel

Elsevier

Místo

OXFORD

ISSN

0042-207X

Periodikum

Vacuum

Svazek

232

Číslo

2

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

10

Strany počet

10

URL

https://www.sciencedirect.com/science/article/pii/S0042207X2400928X

Plný text v Digitální knihovně

http://hdl.handle.net/11012/250091

BibTex

@article{BUT197164,
  author="Josef {Pouzar} and David {Košťál} and Lars-Göran {Westerberg} and Erik {Nyberg} and Ivan {Křupka}",
  title="Labyrinth seal design for space applications",
  journal="Vacuum",
  year="2025",
  volume="232",
  number="2",
  pages="1--10",
  doi="10.1016/j.vacuum.2024.113882",
  issn="0042-207X",
  url="https://www.sciencedirect.com/science/article/pii/S0042207X2400928X"
}

Dokumenty

1-s2.0-S0042207X2400928X-main