【摘要】 根据流体力学以及传热学理论,阐明了流体与固体耦合直接求解温度场的数学关系。基于1.5MW双馈风力发电机电磁结构、通风结构和冷却方式,并结合电机内流体流动与传热特点,以发电机周向1/8区域作为求解域。采用有限体积元法对发电机内流体场和温度场进行耦合求解,并对求解结果进行了详细的数值分析。得出冷却空气在流通区域速度和流量分布规律;在此基础上,研究了电机温升分布规律及传热特性;将计算的结果与实测数据对比,验证了计算结果的正确性。更多还原

【Abstract】 The mathematic relationship of the temperature field solved by the fluid and solid coupling is clarified according to hydromechanics and heat transfer theory.The solution domain including 1/8 region of generator along circumferential direction was established based on the electromagnetic structure,ventilation and cooling method of 1.5 MW doubly-fed wind generator when combined with fluid flow and heat transfer characteristics inside the motor.Fluid and temperature field inner generator were calculated numerically by using finite volume method,and the solving results was analyzed in detail.Besides,the velocity and flow distribution of cooling air in the circulation area were obtained.Then the temperature distribution and heat transfer characters of the electrical motor were analyzed.Finally,the calculated results show good agreement with the measured results,which will provide a theoretical basis for the operation of wind generator and the design of greater capacity of wind generator.更多还原