异步风力发电机流动与传热分析及优化设计

Flow and Heat Transfer Analysis and Optimum Design of Asynchronous Wind Power Generator

为了研究兆瓦级风力发电机内部流体流动与传热特性,以1台异步风力发电机为研究对象,基于计算流体力学(CFD)与数值传热学(NHT)基本原理,采用有限体积法对发电机进行整机建模,对流场与温度场进行数值计算。通过与试验数据的对比分析,验证了计算方法的正确性与准确性。对发电机内部流场温度场进行了分析,获得兆瓦级风力发电机冷却介质流动特性。最后,对发电机通风道布置方案下进行了优化,有效降低了发电机热点温升。

In order to study the fluid flow and heat transfer characteristics in a megawatt wind power generator,based on the basic principles of computational fluid dynamics(CFD)and numerical heat transfer(NHT),the finite volume method is used to model the generator,and the flow and temperature fields are calculated numerically.The correctness and accuracy of the calculation method are verified by comparing the calculation results with the experimental data.The temperature field of the internal flow field of the generator is analyzed,and the flow characteristics of the cooling medium of the megawatt wind power generator are revealed.Based on the analysis,the generator ventilation duct layout scheme is optimized,effectively reducing the temperature rise at the generator hot spots.