高压电器2025，Vol.61Issue(7)：82-90,9.DOI:10.13296/j.1001-1609.hva.2025.07.010
基于三角形网格的混合有限元法研究及其在变压器流热耦合计算中的应用
Research on Hybrid Finite Element Method Based on Triangle Mesh and Its Application in Fluid-heat Coupled Calculation of Transformer
摘要
Abstract
In case of analyzing the fluid-heat coupling of transformer by using the least squares finite element meth-od and the windward finite element method,the least squares finite element method needs using the quadrilateral meshes for the fluid field calculation.However,for the transformer model with complex structures such as corner rings and rounded corners,the use of only quadrilateral meshes for analysis will often cause the phenomenon of mesh distortion and,at this time,the fluid field cannot be calculated by the least squares finite element method.In order to improve the applicability range of the hybrid finite element method,a method to realize the hybrid finite element based on the triangular mesh is proposed in this paper,namely,the triangular mesh is processed to a quadrilateral one to realize the calculation of the fluid field and the temperature field.For verifying the effectiveness of the pro-posed method,the hybrid finite element method is used in this paper to calculate the fluid-thermal coupling of the sin-gle-partition model and the converter transformer winding model with such complex structures as angle rings and electrostatic rings,and is compared with the simulation result of Fluent software.The analysis results show that the processing method proposed in this paper can realize the fluid-heat coupling calculation of the transformer with com-plex structure and improve further the ability of the hybrid finite element method to solve the fluid-heat coupling problem of the transformer with complex structure.关键词
变压器/流—热耦合/最小二乘有限元/三角形网格/迎风有限元/复杂结构Key words
transformer/fluid-heat coupling/least squares finite element/triangular mesh/windward finite element/complex structure引用本文复制引用
李浩,刘刚,吕金潮,靳立鹏,胡万君..基于三角形网格的混合有限元法研究及其在变压器流热耦合计算中的应用[J].高压电器,2025,61(7):82-90,9.基金项目
国家重点研发计划项目(2021YFB2401703) （2021YFB2401703）
中央高校基本科研业务费专项资金资助(2022MS073).Project Supported by National Key Research and Development Program of China(2021YFB2401703),Fundamental Research Funds for the Central Universities(2022MS073). （2022MS073）
