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Numerical Analysis of Flow Field in Generator End-Winding Region
Author
Source
International Journal of Rotating Machinery
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-04-21
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Cooling in an end-winding region of a high-powered, large-sized generator still remains a challenge today because of a number of factors: a larger number of parts/components with irregular geometries, complexity in cooling flow paths, flow splitting and mixing, and interactions between rotor-induced rotating flows and nonrotating flows from stationary sections.
One of the key challenges is to model cooling flows passing through armature bars, which are made up of bundles of strands of insulated copper wires and are bent oppositely to cross each other.
This work succeeded in modeling a complex generator end-winding region with great efforts to simplify the model by treating the armature bar region as a porous medium.
The flow and pressure fields at the end-winding region were investigated numerically using an axial symmetric computational fluid dynamics (CFD) model.
Based on the analysis, the cooling flow rate at each flow branch (rotor-stator gap, rotor subslot, outside space block, and small ventilation holes to the heat exchanger) was determined, and the high-pressure gradient zones were identified.
The CFD results have been successfully used to optimize the flow path configuration for improving the generator operation performance, and the control of the cooling flow, as well as minimizing windage losses and flow-introduced noises.
American Psychological Association (APA)
Tong, Wei. 2008. Numerical Analysis of Flow Field in Generator End-Winding Region. International Journal of Rotating Machinery،Vol. 2008, no. 2008, pp.1-10.
https://search.emarefa.net/detail/BIM-491037
Modern Language Association (MLA)
Tong, Wei. Numerical Analysis of Flow Field in Generator End-Winding Region. International Journal of Rotating Machinery No. 2008 (2008), pp.1-10.
https://search.emarefa.net/detail/BIM-491037
American Medical Association (AMA)
Tong, Wei. Numerical Analysis of Flow Field in Generator End-Winding Region. International Journal of Rotating Machinery. 2008. Vol. 2008, no. 2008, pp.1-10.
https://search.emarefa.net/detail/BIM-491037
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-491037