Numerical Analysis on Steam Exciting Force Caused by Rotor Eccentricity
Joint Authors
Cao, L. H.
Wang, J. X.
Li, P.
Hu, P. F.
Li, Y.
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-06-12
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The steam exciting force has been proved to be great threat to the operation safety of steam turbines.
The mechanism of steam exciting vibration cannot be profoundly revealed by simply analyzing the steam exciting force, especially in simplified models.
Therefore, a full-circle stage of steam turbine with shroud and labyrinth seals was investigated by numerical simulator CFX.
The instability of leakage flow and the pressure fluctuation were analyzed on the eccentric condition.
The effects of leakage vortexes, the depth-width ratio of seal cavity, and the eccentricity on the steam exciting force were studied.
Results show that the leakage flow is nonuniform in the circumferential direction with the change of front teeth vortexes, which causes the steam exciting force.
The tangential and radial steam exciting force both increase with the eccentricity increasing.
The effects of the depth-width ratio of seal cavity on the two forces are different.
In addition, the pressure fluctuation caused by the leakage vortexes on the shroud surfaces is a main factor inducing the steam exciting force.
This research provides a theoretical guidance for the operation safety and optimization of steam turbines.
American Psychological Association (APA)
Cao, L. H.& Wang, J. X.& Li, P.& Hu, P. F.& Li, Y.. 2017. Numerical Analysis on Steam Exciting Force Caused by Rotor Eccentricity. Shock and Vibration،Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1205113
Modern Language Association (MLA)
Cao, L. H.…[et al.]. Numerical Analysis on Steam Exciting Force Caused by Rotor Eccentricity. Shock and Vibration No. 2017 (2017), pp.1-9.
https://search.emarefa.net/detail/BIM-1205113
American Medical Association (AMA)
Cao, L. H.& Wang, J. X.& Li, P.& Hu, P. F.& Li, Y.. Numerical Analysis on Steam Exciting Force Caused by Rotor Eccentricity. Shock and Vibration. 2017. Vol. 2017, no. 2017, pp.1-9.
https://search.emarefa.net/detail/BIM-1205113
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1205113