Calculation and analysis of the surface heat-transfer coefficient and temperature fields on the three-dimensional complex end windings of a large turbogenerator

Jichao Han, Weili Li, Likun Wang, Xingfu Zhou, Xiaochen Zhang, Yong Li

Research output: Journal PublicationArticlepeer-review

19 Citations (Scopus)

Abstract

With increased turbogenerator capacity and electromagnetic load, overheating of the complex end parts has become one of the main problems affecting safe and stable turbogenerator operation. In this research, a flow network was built representing the structural and ventilation characteristics of a 330-MW turbogenerator. The fan inlet velocity and pressures (boundary conditions) of each end-region outlet were obtained by the flow network method. The 3-D transient electromagnetic field in the turbogenerator end was calculated, and the eddy current losses (heat sources) of the end parts were obtained by the finite-element method. To study the surface heat-transfer coefficient distribution on the stator-end winding surface, fluid and thermal mathematical and geometric models of the whole turbogenerator end region were given. Using the finite-volume method, the surface heat-transfer coefficient distribution on the complex 3-D stator-end winding surface, fluid-flow distribution, and temperature distribution of the end parts were investigated under rated-load conditions. The calculated temperature results match well with measured data. This research can provide a theoretical basis for calculating the heat-transfer coefficients of the outer surfaces of large turbogenerators.

Original languageEnglish
Article number6701174
Pages (from-to)5222-5231
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Volume61
Issue number10
DOIs
Publication statusPublished - Oct 2014
Externally publishedYes

Keywords

  • End region
  • flow network
  • fluid-flow distribution
  • surface heat-transfer coefficient
  • temperature distribution
  • transient electromagnetic field
  • turbogenerator

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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