中国电机工程学报2025，Vol.45Issue(12)：4870-4882,中插29,14.DOI:10.13334/j.0258-8013.pcsee.240818
航空自通风冷三级式无刷发电机热建模与温度分布特性研究
Research on the Thermal Modeling and Temperature Distribution Characteristics of the Aircraft Self-ventilated Wound Rotor Synchronous Generator
摘要
Abstract
The aircraft self-ventilated wound rotor synchronous generator(WRSG)exhibits significant loss differences between each stage of the generator and a long heat dissipation path.This results in a large temperature distribution gradient,which is prone to local overheating.It is necessary to model and study the thermal characteristics.To address this,the fluid-solid coupling thermal modeling method under multi-physics field of the WRSG is studied.A comparative analysis is conducted on the influence of different mesh types on the efficiency of numerical computations in the fluid field.Subsequently,based on the Realizable k-ε model,the heat dissipation capacity of the fan in WRSG and the influence of multi-stage structure on airflow state are explored.The detailed frictional resistance of each rotating component is analyzed.Considering the influence of multiturn winding end insulation on thermal conductivity,a secondary equivalent method is proposed for the three-dimensional cylindrically anisotropic modeling of windings.The temperature field model is established to study the temperature rise characteristics under different operating conditions.Analyze the temperature distribution pattern and its influencing factors of the WRSG from various aspects such as different stages generators,stators and rotors,and different operating conditions.Finally,a temperature rise experiment is conducted for verification.The research results provide targeted guidance for the cooling design of the WRSG.The research theory can also be applied to the thermal modeling of other electric machines.关键词
自通风冷三级式无刷发电机/建模/流固耦合/网格/温度场Key words
self-ventilated wound rotor synchronous generator/modeling/fluid-solid coupling/mesh/temperature field分类
动力与电气工程引用本文复制引用
李涵琪,张卓然,李进才,廖晨东..航空自通风冷三级式无刷发电机热建模与温度分布特性研究[J].中国电机工程学报,2025,45(12):4870-4882,中插29,14.基金项目
国家自然科学基金"叶企孙"联合基金重点项目(U2141223) （U2141223）
航空科学基金项目(20230007052001) （20230007052001）
江苏省"卓博计划"(2023ZB290). Key Project of the"Ye Qisun"Joint Fund of the National Natural Science Foundation of China(U2141223) （2023ZB290）
Aeronautical Science Foundation of China(20230007052001) （20230007052001）
Jiangsu Funding Program for Excellent Postdoctoral Talent(2023ZB290). （2023ZB290）
