In order to study flow characteristics of tip clearance flow in turbine shroud
a cooling experimental system was designed
and the instantaneous flow field of each typical section was received by particle image velocimetry(PIV).Then the flow field characteristics of tip clearance flow were studied.The result shows:two cooling flows of the turbine shroud cavity mixing with tip leakage flow makes the flow state in shroud cavity very complex.Therefore
vortex flows with different functions and sizes are generated at different positions in shroud cavity.Meanwhile
both the two cooling airflows have blocking effect on the leakage flow
and the effect from the former hole is more obvious.