中国电机工程学报2024，Vol.44Issue(13)：5328-5337,中插26,11.DOI:10.13334/j.0258-8013.pcsee.230417
计及复杂换位结构的百万千瓦级汽轮发电机定子流固耦合传热研究
Study of Fluid-solid Coupled Heat Transfer in Stator of Million-kilowatt-class Turbo-generator With Complex Transposition Structure
摘要
Abstract
In stator windings of million-kilowatt-class turbo-generators,the complex transposition structure with many parallel hollow strands and solid strands is usually adopted.Addressing the challenging issue of the numerical solution of the stator fluid-solid coupling model,which suffers from a large grid count and susceptibility to singular solutions due to the intricate structure with vastly varying sizes,this paper proposes the three-dimensional segmental fluid-solid coupling grid division method.The proposed method can significantly reduce the number of grids in the solution model by utilizing a non-uniform grid division method based on the structure and heat transfer characteristics of strands in different segment.As a result,it enables numerical solution of the stator fluid-solid coupling model considering the complex transposition structure.The proposed method is verified by the short circuit type test data of a 1.24 million-kilowatt-class water-hydrogen-hydrogen-cooled turbo-generator.On this basis,a new cross-transposition method for stator windings is proposed,and the temperature is compared with that of the traditional transposition method.The results demonstrate that the temperature distribution of strands and insulation of stator windings is more evenly and the maximum temperature of stator windings can be reduced effectively for the new cross-transposition method.关键词
百万千瓦级汽轮发电机/定子/复杂换位结构/流固耦合/传热Key words
million-kilowatt-class turbo-generator/stator/complex transposition structure/fluid-solid coupling model/heat transfer分类
信息技术与安全科学引用本文复制引用
边旭,孟雨鹏,梁艳萍,王乃元,韩仰志..计及复杂换位结构的百万千瓦级汽轮发电机定子流固耦合传热研究[J].中国电机工程学报,2024,44(13):5328-5337,中插26,11.基金项目
国家自然科学基金项目(51807040) （51807040）
黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2020179). Project Supported by National Natural Science Foundation of China(51807040) （UNPYSCT-2020179）
University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province(UNPYSCT-2020179). （UNPYSCT-2020179）
