HTR-PM主氦风机电机冷却性能分析
HTR-PM helium circulator motor cooling

HTR-PM（high temperature reactor-pebblebed modules）主氦风机是高温气冷堆的重要部件，使用氦气作为工作介质。由于空间结构限制，主氦风机采用了自带风冷的一体化结构，通过专设冷却装置将电机热量带出。为了能针对性地设计辅助叶轮，需要得到电机冷却流道的流动特性和传热特性等热工参数。该文针对主氦风机特殊的冷却流道进行了实验研究，通过对氮气工质下的实验获得了HTR-PM的特殊风冷系统的流动特性和传热特性，并向氦气工质下的特性进行类推。根据实验分析和理论计算，给出了冷却系统的优化方案。该方案将为下一步HTR-PM主氦风机辅助叶轮的设计和优化提供重要基础。
Abstract：The helium circulator is an important part of the HTR-PM which uses helium as its working medium. Due to the limited space in the HTR-PM, the main helium fan uses a self-contained, air-cooled integrated structure to remove the motor heat. The auxiliary impeller design is then based on the flow characteristics and heat transfer characteristics of the motor cooling flow. Experiments using nitrogen as the working fluid were conducted to study the flow and heat transfer characteristics of the HTR-PM air-cooling system with the results extended to the helium working fluid. The experimental and theoretical results were used to optimize the cooling system design for the next HTR-PM main helium turbine auxiliary impeller design and optimization.