Effects of endwall movement on the aerodynamic performance of cantilevered stators
To explore the impact of endwall movement on the performance of cantilevered stators,the effects of hub movement,hub movement speed and the gap size of cantilevered stators on the internal flow and performance of a low-speed axial compressor were researched in detail.The results showed the flow blockage/loss of hub area was reduced and the compressor performance was improved with the increase of the endwall movement speed or the decrease of the gap size in case of endwall movement.This phenomenon was mainly attributable to the disappearance of the secondary flow and the reduction of the leakage flow involved in the mixing.The endwall movement also affected the inlet flow field of the cantilevered stators,which in turn affected the characteristics of the rotor.However,compared with the effect on the characteristics of the stator,the change amplitude of the rotor characteristics was relatively small.
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