Patent ID: 8602720

Claim:
A compressor section, comprising: a rotor platform; a rotor blade extending radially outwardly from the rotor platform, the rotor blade including a pressure sidewall and a circumferentially opposing suction sidewall extending in a radial direction between a root and a tip and in an axial direction between a leading edge and a trailing edge; a casing having an inner surface surrounding the tip and spaced radially outwardly therefrom to define a gap therebetween; a plurality of grooves disposed in the inner surface of the casing and extending in a generally circumferential direction, the plurality of grooves including a first groove and a second groove; and a channel system comprising at least a first channel positioned within the casing and configured to provide fluid communication between the first groove and the second groove, wherein the channel system further includes a second channel and the plurality of grooves further includes a third groove, the second channel configured to provide fluid communication between the second groove and the third groove, wherein the first channel is circumferentially aligned with the second channel.