Based on computational fluid dynamics principle

applying finite volume method

the 3-D ventila- tion physical model of the whole machine was established and corresponding boundary conditions are given to study the flow field characteristics. Using Fluent software

the flow field of two schemes proposed by the manufacturer was numerically simulated. The results show that flow path line feature of two schemes is different. When the pressure difference of inlet and outlet is 0 Pa

circulation between axial stator and rotor ducts appears. The pressure difference of inlet and outlet is 742 Pa

air of the axial stator and rotor ducts flows out directly from the ducts and then goes into the chimney fan. The error of air volume flow rate of the inlet solved with finite volume method and equivalent wind path method is 0.04%

which is within the engineering permission and proves rationality of the results. The results provide references for the wind path design of the same type exciter.