基于场协同理论的永磁风力发电机传热特性研究  

Study on heat transfer performance of small permanent magnet wind turbine based on field synergy theory

作　　者：张建勋[1] 王皓[1] 温彩凤[1,2,3] 汪建文[1,2] 彭海伦[1] 

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051 [2]风能太阳能利用技术省部共建教育部重点实验室,内蒙古呼和浩特010051 [3]中国科学院新疆理化技术研究所,新疆乌鲁木齐830011

出　　处：《可再生能源》2017年第4期541-545,共5页Renewable Energy Resources

基　　金：内蒙古自治区自然科学基金资助项目(2015BS0502)

摘　　要：针对永磁风力发电机运行时谐波含量大、发热严重且不易散热问题,文章以额定功率为500 W、额定转速为750 r/min样机为研究对象,依照其散热结构及传热特点,建立流动及传热三维物理模型,结合工程实际并考虑主要因素,对求解域设定基本假设和边界条件。基于流体力学和传热传质理论,将实际问题抽象为待求解的数学模型,采用有限体积元法对外流场、温度场及内流场进行迭代求解,进而依据场协同理论对发电机温升分布及散热性能进行分析。研究表明,发电机的散热效果取决于结构及流场场型,提出发电机散热性能评价指标,并依据指标对样机进行换热性能评价,为发电机结构设计及传热性能优化起到指导作用。When the permanent magnet wind power generator runs, the harmonic content is large, the heat is serious, and the heat dissipation is not easy.In the paper,the generator with rated power 500 W and rated speed 750 r/min is used as the research object.Three dimensional physical model of flow and heat transfer is established according to the structure and heat transfer characteristics of the generator.Combined with the engineering practice and considering the main factors, the basic assumptions and boundary conditions are set up.Based on the theory of fluid mechanics and heat and mass transfer, the practical problem is abstracted into a mathematical model to be solved.Then the finite volume element method is used to solve the flow field and temperature field.Based on the field synergy theory, the temperature rise distribution and heat dissipation performance are analyzed.Research shows that the cooling effect of the generator depends on the structure and flow field. Put forward the evaluation index of the generator cooling performance, and according to the index on the prototype heat transfer performance evaluation.It can be used to guide the design of generator structure and optimization of heat transfer performance.

关 键 词：小型永磁风力发电机 有限体积元法 传热特性 场协同理论 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]