直流
The converter units generate harmonics which flow in the AC and DC lines. 换流器单元产生的谐波会流过交流和直流线路。
Numerical experiments were performed to investigate the instability of flow and heat transfer in a heated rotating cavity with cool air axial throughflow. 利用数值模拟的方法对冷气轴向通流旋转盘腔的流动过程进行了研究。
