Compressor part span shroud
 A compressor blade assembly for a compressor operating at transonic or supersonic blade speeds has a part span shroud. The shroud is twisted having a first angle in the direction of airflow on one side of the shock wave and a second angle in the direction of airflow on the other side of the shock wave. 
United Technologies Corporation
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Kent A. Evans E. Robert H.
Lyons Griffin Zipps