热真空永磁流量计的热工和电磁设计与分析  

Design and Analysis of Thermal and Electromagnetic Characteristics for Thermal Vacuum Permanent Magnet Flowmeters

作　　者：纪胜楠 毕可明[1] 柴宝华[1] 阎鑫[1] 陈硕 JI Shengnan;BI Keming;CHAI Baohua;YAN Xin;CHEN Shuo(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《核科学与工程》2023年第4期799-807,共9页Nuclear Science and Engineering

摘　　要：利用ANSYS CFX和MAXWELL软件对中国原子能科学研究院设计的热真空永磁流量计进行了热工和电磁分析,该流量计用于测量地面试验回路中真空条件下1000℃高温液态碱金属的流量,给出了流量计的温度云图和磁感应强度分布图,并得到了输出电压与流速的基本关系。结果表明:使用三层隔热屏阻隔降温,冷却铜块接触冷却,可将磁钢温度控制在100℃以下;选用钕铁硼和钐钴永磁体,均可输出毫伏级电信号,而用高磁能积的钕铁硼可使流量计实现更小的重量和体积,确保了永磁流量计在热真空条件下运行的可靠性。The thermal and electromagnetic analysis of the thermal vacuum permanent magnet flowmeter designed by China Institute of Atomic Energy is carried out by using the ANSYS CFX and Maxwell software.The flowmeter is used to measure the flow of 1000℃high-temperature liquid alkali metal under vacuum condition in the ground test circuit.The temperature cloud diagrams and magnetic induction intensity distribution diagrams of the flowmeter are given,and the basic relationship between output voltage and flow rate is obtained.The results show that the temperature of magnetic steel can be controlled below 100℃by using the three-layer heat shield to block cooling and contact cooling of the cooling copper block.Neodymium iron boron and samarium cobalt permanent magnets can output millivolt electrical signals,while neodymium iron boron with high magnetic energy product can make the flowmeter realize smaller weight and volume,ensuring the reliability of the permanent magnet flowmeter under thermal vacuum conditions.

关 键 词：永磁流量计 热真空 热工计算 电磁计算 

分 类 号：TL48[核科学技术—核技术及应用]