The reason of the circulating current occurring in out-door air-core dry-type power reactor is clarified A valid method is proposed to reduce the circulating current,through which the circulating current in a group of BKGKL-30000/69 power reactor is reduced markedl

In stator winding bars circuit with 0°/540°/ 0°- transposed strands, circulating current is arisen from residual transverse induced electromotive force at end region of large turbogenerator.

This paper establishes a mathematical model of the gas flow field inside separating column of the circumfluent circulation cyclone separator based on the N-S equation under column coordinate,gives the resolution of the cyclone flow field in separating column with weighted residual method,and compares computation values with trial values as well.