EAST阻性换热器多物理场耦合模拟计算

阻性换热器是EAST高温超导(HTS)电流引线的重要组成部分,目前有三头螺旋翅片和叠片两种结构形式,为了比较这两种阻性换热器的优劣,对它们的热工水力性能进行了多物理场耦合模拟计算,计算结果表明:两种阻性换热器在换热性能方面基本相当,均可满足快速换热的要求,但叠片换热器的流动阻力远小于三头螺旋翅片换热器的。实际运行过程中,三头螺旋翅片换热器中氮冷却回路的压力控制较为困难,经常需人工调节控制阀阀门,而叠片换热器中氮冷却回路的压力控制则较为简单,不需经常调节。因此,叠片式结构较三头螺旋翅片式结构更适合应用在EAST阻性换热器中。     

Preliminary Thermal Mechanical Analysis of the Equatorial Thermal Shield for ITER

Thermal analysis of the equatorial thermal shield for ITER is conducted in order to confirm that the cooling tube design was reasonable under both the plasma operational and the baking operational conditions.The structural performance was analyzed by means of the finite element software ANSYS.A comparison of the results with design requirements shows that the results of the simulation are within allowable design requirements,which indicates the feasibility and reliability of the equatorial thermal shield structure.     

PVD涂层与未涂层硬质合金刀具切削力的对比试验研究

应用同型号未涂层、TiN涂层和TiCN涂层硬质合金刀具进行切削试验 ,用KISTLER三向测力仪、电荷放大器和PC机组成的切削力数据采集系统进行三向切削力采集。试验表明在切削过程中PVD涂层硬质合金刀具的切削力随刀具进给量、切削深度、切削速度的变化规律与未涂层硬质合金刀具相同 ,但涂层硬质合金刀具的切削力明显小于未涂层硬质合金刀具的切削力     

低温文丘里流量计计算机数据采集的实现

结合低温文丘里流量计的原理,阐述了HT-7U超导模型线圈低温实验中超临界氦流量的计算机采集系统的实现,以及在实现的过程中程序设计所使用的各种技术.     

PVD涂层与未涂层硬质合金刀具切削刀的对比试验研究

应用同型号未涂层、TiN涂层和TiCN涂层硬质合金刀具进行切削试验，用KISTLER三向测力仪、电荷放大器和PC机组成的切削力数据采集系统进行三向切削力采集。试验表明在切削过程中PVD涂层硬质合金刀具的切削力随刀具进给量、切削深度、切削速度的变化规律与未涂层硬质合金刀具相同，但涂层硬质合金刀具的切削力明显小于未涂层硬质合金刀具的切削力。     

EAST装置技术诊断数据采集系统设计

介绍了EAST托卡马克核聚变实验装置技术诊断数据采集系统设计。系统采用双缓冲模式、多路采样信号的同步、分布式数据采集、数据库管理等技术,解决了技术诊断的高速、连续与同步采集问题。该模式的技术诊断数据采集系统,已在磁体测试装置上使用,多次实验表明该采集系统性能稳定,能够满足聚变工程需求。     

Experimental Study on Paschen Tests of ITER Current Lead Insulation

An experimental Paschen test setup has been established to analyze the quality of ITER current lead (CL) insulation and extend the research on Paschen’s law under various conditions. Insulation problems can destroy a machine if a Paschen discharge is triggered by an insulation defect that is caused by faulty manufacturing, electromagnetic force, and thermal stress load with a certain degree of vacuum helium or pipe leakage. The results show that the CL insulation mock-up worked well under normal temperature and pressure. Besides, the mock-up also worked well in helium conditions and at 80 K temperature at different pressures. One area of CL insulation was severely destroyed when the 80 K test was conducted after 5 thermal cycles, resulting in Paschen discharge phenomenon. The breakdown voltage is maintained at a relatively low level under different pressure conditions; the change of breakdown voltage was mainly due to the change of pressure, and such change was in line with the Paschen law.     

自动闭口石油产品闪点测定仪器的研制

介绍了石油闭口闪点仪的工作原理以及为实现仪器的功能而采偶闪点检测、四线法的温度测量和采用模糊控制技术来进行温度的控制等.样机的实验结果表明该样机满足石油产品的实验要求.     

双S弯结构应变计算与试验测量

双S弯结构是ITER馈线系统的重要组成部分,主要用来吸收电缆由于降温收缩造成的位移变形,为了确定该结构在一定位移载荷下的变形情况,基于能量原理,采用单位力法计算出该结构轴向各位置的轴力、弯矩和应变分布。通过数值模拟和试验测量,应变的理论计算值与数值模拟所得值和试验测量值的相对差值都很小。可以认为：运用该方法计算类似结构的轴力、弯矩和应变分布是可行的,计算结果具有较高的准确度。