基于CAE技术的大功率磁控管散热系统设计

Design of High Power Magnetron Heat Dissipation System Based on CAE

运用流体分析软件对大功率磁控管模型进行风冷流场和温度模拟,完成了输出功率为1.5kW和2kW的大功率磁控管散热系统设计。分别对磁控管内部叶片结构、散热片数量、厚度、材质及应用风压等级等参数进行计算,得到磁控管温升对以上各参数变化的敏感程度,结果显示磁控管温度在考察功率范围内与耗散功率呈线性关系,而散热系统设计参数的提高受到各种因素的限制。因此,在允许空载的情况下,对于输出功率超过2kW的大功率磁控管,风冷方式已经难以满足磁控管的冷却需求。

The fluid and temperature distribution of high power magnetron is simulated by fluid analy-sis software. Two types of high power magnetron dissipation systems with output power about 1.5 kW and 2 kW were designed. The structure, number, thickness, material of the vanesand the wind pressure were analyzed in the simulation. Sensitivity of anode temperature on these parameters was revealed. Re-sults showed that anode temperature is linearly raised along with the dissipation power in the interested range while parameters said are limited to improve the heat dissipating ability of the system by a variety of factors. As a result, with empty load condition allowed, a high power magnetron with output power high-er than 2 kW by air cooling can hardly run safely.