中文摘要：

脉冲功率电源系统与耗能装置之间通过同轴电缆连接，同轴电缆在连续快速脉冲大电流工况下会温升过高。针对该问题，建立了同轴电缆有限元磁一热耦合模型，分析了管槽对流传热系数计算方法及其影响因素，同时分析了同轴电缆在自然冷却和强制冷却条件的温升特性。在此基础上，针对同轴电缆内部导体温升过高问题，设计了多种新型水冷式同轴电缆，分析了不同冷却方案同轴电缆冷却效果，结果表明：内外导体冷却式同轴电缆冷却效果较明显，可以满足设计要求。

英文摘要：

Pulsed power supply The temperature of the cable w high. Consequently, a finite ele system is connected with energy-dissipation devices by coaxial cable. orking on the condition of continuous pulse high current will be rather ment model is established for investigating the cable temperature cha- racteristics of thermomagnetic convection. The computing method and influencing factors of convec- tive heat-transfer coefficient of tube are introduced. The temperature characteristic of cable on the con- vection condition of natural cooling and forced cooling is analyzed. Due to the excessively high tempe- rature of internal conductors of cable, some new water-cooled cables are designed and cooling perfor- mance of them is studied. The results show that the cooling perfor-mance of both inner and outer con- ductor water-cooled cables is obvious and can meet with the design requirement.