摘要
以一台高海拔用双馈风力发电机为研究对象,在基本假设的基础上,建立了发电机内流体场以及温度场相耦合的求解模型,根据给定的边界条件及电机内传热的基本特性,采用有限体积元法对发电机内的多元温度场进行求解。通过数值计算分析了发电机内部的流体场流变特性以及传热特点,并以平原地区的实验数据为依据,验证了温度场数值计算的合理性和准确性。最后,将高海拔地区的电机温升计算结果与采用不同标准获得的温升结果进行对比,进一步佐证了温度场计算的精确性,并且有效缩减了标准范围,为发电机在高海拔地区安全运行和设计提供理论依据。
Taking a high altitude type doubly-fed wind generator as the research object, the coupled model of temperature and fluid field is established on the basis of fundamental assumptions. And according to the given boundary conditions and the basic characteristics of heat transfer in the generator, multiple temperature fields is solved by using finite volume method. The rheological characteristics of fluid field inside generator and the heat transfer characteristics are analyzed detailly through numerical calculation, whose rationality and accuracy is verified according to the measured data in plain region. Finally, the calculation precision of temperature field is proofed further by comparing temperature rise results calculated in high altitude area with results got using different standards, and the scope of standard is reduced effectively, which will provide a theoretical basis for generator safe operation in high altitude area and design.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第24期74-79,13,共6页
Proceedings of the CSEE
基金
黑龙江省博士后基金(Lbh-z10232)~~
关键词
风力发电机
流固耦合
高海拔
温升标准
精度
wind generator
fluid-solid coupling
high altitude
standard of temperature rise
precision
