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| ¡¡ Numerical Investigation of Interaction Between
Casing Treatment and Tip Leakage Flow in a Transonic Compressor Rotor Abstract£ºTip leakage flow has a strong effect on the transonic compressor performance
and stability£® Based on improved understanding of compressor rotor tip clearance flow£¬a
new type of casing treatment was designed for a transonic axialª²flow compressor rotor
and numerical simulation of threeª²dimensional unsteady flow in the compressor rotor was
carried out to verify the designed casing treatment£®The numerical results£¨smooth wall
case£©agreed well with our experimental test data for estimation of the global
performance£¬and this new type of casing treatment was found to increase the compressor
stall margin by up to 52% without loss in efficiency at design point£®The interaction
mechanism between the casing treatment and tip leakage flow was analyzed in detail£®It is
found that the casing treatment could delay the tip leakage vortex breakdown and bleed the
blockage zone caused by the tip leakage vortex breakdown into treatment slots£¬ and
therefore extend the stall margin of transonic compressor effectively£® |
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