Using highly pure graphite rod and B4C/graphite composite rod as electrods, some macroscopic amounts of boron-doped fullerenes, such as C60-nBn and C70-nBn (n=1,2,3) are syn-thesized by DC arc burning method and extra...Using highly pure graphite rod and B4C/graphite composite rod as electrods, some macroscopic amounts of boron-doped fullerenes, such as C60-nBn and C70-nBn (n=1,2,3) are syn-thesized by DC arc burning method and extracted by o-xylene from the soots under nitrogen for the first time. The boron-doped fullerenes are characterized by FDMS.展开更多
针对某±500 k V换流站接地极线路瓷绝缘子炸裂故障,采用有限元法仿真分析了直流电弧对瓷绝缘子的热学影响。依据传热学基本理论,建立了基于有限元法的瓷绝缘子数值计算模型。利用多物理场耦合计算软件COMSOL Multiphysics计算了瓷...针对某±500 k V换流站接地极线路瓷绝缘子炸裂故障,采用有限元法仿真分析了直流电弧对瓷绝缘子的热学影响。依据传热学基本理论,建立了基于有限元法的瓷绝缘子数值计算模型。利用多物理场耦合计算软件COMSOL Multiphysics计算了瓷绝缘子温度场的分布情况,讨论了多因素影响的3种传热方式共同作用下,直流电弧对瓷绝缘子的热学影响,并提出了防治措施。展开更多
文摘Using highly pure graphite rod and B4C/graphite composite rod as electrods, some macroscopic amounts of boron-doped fullerenes, such as C60-nBn and C70-nBn (n=1,2,3) are syn-thesized by DC arc burning method and extracted by o-xylene from the soots under nitrogen for the first time. The boron-doped fullerenes are characterized by FDMS.
文摘针对某±500 k V换流站接地极线路瓷绝缘子炸裂故障,采用有限元法仿真分析了直流电弧对瓷绝缘子的热学影响。依据传热学基本理论,建立了基于有限元法的瓷绝缘子数值计算模型。利用多物理场耦合计算软件COMSOL Multiphysics计算了瓷绝缘子温度场的分布情况,讨论了多因素影响的3种传热方式共同作用下,直流电弧对瓷绝缘子的热学影响,并提出了防治措施。
