Active casing treatment adapted with movable sleeve

A compressor, comprising:

• an impeller rotatable about a central axis and housed in a compressor housing;
• a casing at least partially surrounding the impeller, the casing including an injection port and a bleed port;
• and
• a movable sleeve circumferentially surrounding the casing and defining a first air flow chamber between an outer surface of the casing and an inner surface of the movable sleeve and a second air flow chamber between an outer surface of the movable sleeve and an inner surface of the housing, the movable sleeve configured to selectively block and unblock the injection port and the bleed port.

A system, comprising:

• a compressor, comprising:
• a housing;
• an impeller housed within the housing and rotatable about a central axis;
• a casing at least partially surrounding the impeller and an forming an inner channel fluidically coupling an inlet of the compressor to the impeller, the casing including an injection port and a bleed port;
• a movable sleeve circumferentially surrounding the casing;
• a first air flow chamber extending along an outer surface of the casing;
• and
• a second air flow chamber extending along an outer surface of the movable sleeve;
• an actuating mechanism coupled to the movable sleeve;
• and
• a controller storing instructions executable to:
• actuate the actuating mechanism to move the movable sleeve to a first position where the bleed port is open to the first flow chamber and the injection port is blocked responsive to compressor operation in a surge region;
• and
• actuate the actuating mechanism to move the movable sleeve to a second position where the bleed port is blocked and the injection port is open to the second air flow chamber responsive to compressor operation in a choke region.