Based on the axisymmetric wake impact experiment

several non-axisymmetric wake impact experiments were carried out.When the number and circumferential positions of inlet guide vanes(IGV) were logical

the wakes of non-axisymmetric IGVs could make beneficial unsteady excitation on downstream rotor field.In these experiments

some suitable non-axisymmetric wake impact plans worked better than the axisymmetric wake impact plan.As compared to the axisymmetric wake impact plan

the non-axisymmetric wake impact plan could supply multi-frequency exciting signals.In addition to the beneficial high-frequency signal

the non-axisymmetric plan B generated a low-frequency square-wave exciting signal and some beneficial secondary signals.Based on the unsteady cooperative flow theory

the exciting wakes in non-axisymmetric plan were easier to cooperate with complicated vortices in a compressor

such as clearance vortices

passage vortices and separated vortices.The non-axisymmetric wake impact plan B in this paper could make the max efficiency increase by 1.2%

total pressure rise and stall margin rise by a little.