A new kind of centrifugal impeller with slots cut along the blade ends close to shroud is proposed.Due to the pressurized air flows from pressure sides to suction sides of the blades and the additional energy supplys to the flow with low velocity inside the passages in the impeller,the jet-wake flow at exit of the impeller caused by secondary flows is weakened and the problems of dust or ash accumulated on the blades often encountered with partial loads are expected to be solved to some extend.The numerical...
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