Performance Analysis of Hydrodynamic Pressure Finger Seal by Wall Slip Effect
Joint Authors
Zhang, Yan-chao
Wang, Ting
Zhang, Dong-ya
Yin, Ming-hu
Cui, Ya-hui
Chen, Ling-ping
Du, Peng-fei
Wang, Rui
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-07-04
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Hydrodynamic pressure finger seal1 is a kind of flexible noncontact dynamic sealing device with good application potential.
It relies on the ultrathin dynamic pressure film effect produced by the rotation of finger boot and rotor to realize the design of noncontact and low leakage and is suitable for high-speed dynamic sealing parts.
However, under the high-speed condition, there is a wall slip effect when the gas flows in the microchannel with a thickness of about 10 μm between the finger boot and rotor, which affects the stability of the dynamic pressure air film and also affects the change of the air film bearing capacity and the leakage rate of the finger seal.
Therefore, based on the theory of microflow, the interstitial flow field model of finger seal under fluid dynamic pressure is established, and its slip effect under high speed is analyzed.
The results show that the slip ratio of the sealing medium temperature of 500°C and 0.1 MPa conditions reached 27.28%.
When considering the slip effect of the wall surface generated by the gas under shear driving, the gas film bearing capacity decreased and the leakage rate increased.
When the pressure difference between the upper and lower reaches of the seal is 0.1 MPa, and the rotor line speed is 400 m/s, the gas film bearing capacity decreases by 17.39% after considering the slip effect of the wall surface, and the leakage rate increases by 14.06%.
The results provide an important reference for the structural design and leakage control of hydrodynamic finger seal.
American Psychological Association (APA)
Zhang, Yan-chao& Wang, Ting& Zhang, Dong-ya& Yin, Ming-hu& Cui, Ya-hui& Chen, Ling-ping…[et al.]. 2020. Performance Analysis of Hydrodynamic Pressure Finger Seal by Wall Slip Effect. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1194176
Modern Language Association (MLA)
Zhang, Yan-chao…[et al.]. Performance Analysis of Hydrodynamic Pressure Finger Seal by Wall Slip Effect. Mathematical Problems in Engineering No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1194176
American Medical Association (AMA)
Zhang, Yan-chao& Wang, Ting& Zhang, Dong-ya& Yin, Ming-hu& Cui, Ya-hui& Chen, Ling-ping…[et al.]. Performance Analysis of Hydrodynamic Pressure Finger Seal by Wall Slip Effect. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1194176
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194176