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The Sealing Capacity And Heat Transfer Characteristics Of A Straight-Through Labyrinth Seal With Different Geometric Parameters

Yang, Shaoyun ; Du, Wei LU ; Luo, Lei ; Wang, Songtao and Sundén, Bengt LU (2023) In Heat Transfer Research 54(17). p.53-73
Abstract

The sealing capacity and heat transfer characteristics of the straight-through labyrinth seal with different geometric parameters are analyzed in this paper through numerical investigation. The geometric parameters studied include the gap width varying from 2 mm to 6 mm, the tooth tip thickness varying from 1 mm to 3 mm, and the front inclination angle varying from 75° to 100°. For each case, the Reynolds number is varied from 10,000 to 40,000. According to the results, the sealing performance is mainly influenced by the gap width, and less affected by the tooth tip thickness and the front inclination angle. As the gap width is increased, the discharge coefficient is increased by about 40%. With the tip thickness or the front... (More)

The sealing capacity and heat transfer characteristics of the straight-through labyrinth seal with different geometric parameters are analyzed in this paper through numerical investigation. The geometric parameters studied include the gap width varying from 2 mm to 6 mm, the tooth tip thickness varying from 1 mm to 3 mm, and the front inclination angle varying from 75° to 100°. For each case, the Reynolds number is varied from 10,000 to 40,000. According to the results, the sealing performance is mainly influenced by the gap width, and less affected by the tooth tip thickness and the front inclination angle. As the gap width is increased, the discharge coefficient is increased by about 40%. With the tip thickness or the front inclination angle increased, the discharge coefficient is increased by less than 5%. For the heat transfer of the end wall, the gap width has significant effects, while the effects of the other two parameters are mainly in the first tooth cavity. For the stator, the increased flow rate at the tooth tip results in enhanced local heat transfer. For the rotor, the heat transfer is determined by the vortex intensity in the tooth cavity. The presence of small secondary vortices weakens the local heat transfer.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
geometric parameters, heat transfer, leakage loss, straight labyrinth seal
in
Heat Transfer Research
volume
54
issue
17
pages
21 pages
publisher
Begell House
external identifiers
  • scopus:85176430146
ISSN
1064-2285
DOI
10.1615/HEATTRANSRES.2023048149
language
English
LU publication?
yes
additional info
Funding Information: The authors acknowledge the financial support provided by the Natural Science Foundation of China (No. 52076053), China Postdoctoral Science Foundation funded Project (2021M690823), National Science and Technology Major Project (P2021-AB-I-003-001, No. 2019-II-0010-0030), and Natural Science Fund for Excellent Young Scholars of Heilongjiang Province (No. YQ2021E023). Publisher Copyright: © 2023 by Begell House, Inc.
id
b85095bd-f374-481e-8894-f7fe80927ff4
date added to LUP
2024-01-10 13:15:38
date last changed
2024-01-10 13:16:33
@article{b85095bd-f374-481e-8894-f7fe80927ff4,
  abstract     = {{<p>The sealing capacity and heat transfer characteristics of the straight-through labyrinth seal with different geometric parameters are analyzed in this paper through numerical investigation. The geometric parameters studied include the gap width varying from 2 mm to 6 mm, the tooth tip thickness varying from 1 mm to 3 mm, and the front inclination angle varying from 75° to 100°. For each case, the Reynolds number is varied from 10,000 to 40,000. According to the results, the sealing performance is mainly influenced by the gap width, and less affected by the tooth tip thickness and the front inclination angle. As the gap width is increased, the discharge coefficient is increased by about 40%. With the tip thickness or the front inclination angle increased, the discharge coefficient is increased by less than 5%. For the heat transfer of the end wall, the gap width has significant effects, while the effects of the other two parameters are mainly in the first tooth cavity. For the stator, the increased flow rate at the tooth tip results in enhanced local heat transfer. For the rotor, the heat transfer is determined by the vortex intensity in the tooth cavity. The presence of small secondary vortices weakens the local heat transfer.</p>}},
  author       = {{Yang, Shaoyun and Du, Wei and Luo, Lei and Wang, Songtao and Sundén, Bengt}},
  issn         = {{1064-2285}},
  keywords     = {{geometric parameters; heat transfer; leakage loss; straight labyrinth seal}},
  language     = {{eng}},
  number       = {{17}},
  pages        = {{53--73}},
  publisher    = {{Begell House}},
  series       = {{Heat Transfer Research}},
  title        = {{The Sealing Capacity And Heat Transfer Characteristics Of A Straight-Through Labyrinth Seal With Different Geometric Parameters}},
  url          = {{http://dx.doi.org/10.1615/HEATTRANSRES.2023048149}},
  doi          = {{10.1615/HEATTRANSRES.2023048149}},
  volume       = {{54}},
  year         = {{2023}},
}