Patent ID: 7988426

Claim:
A method for cooling a bearing, comprising: flowing a fluid outwardly from a port in a compressor; locating the port, along a meridional length of a shroud line, in accordance with relationships: port location 90% to 95% of the meridional length for a pressure ratio between 1.5 and 2.0; port location 75% to 80% of the meridional length for a pressure ratio between 2.0 and 2.5; port location 65% to 70% of the meridional length for a pressure ratio between 2.5 and 3.0; port location 55% to 65% of the meridional length for a pressure ratio between 3.0 and 3.5; port location 45% to 50% of the meridional length for a pressure ratio between 3.5 and 4.0; port location 35% to 45% of the meridional length for a pressure ratio between 4.0 and 5.0; and port location 25% to 35% of the meridional length for a pressure ratio of 5.0 or greater, wherein the pressure ratios are ratios of pressure at a compressor outlet to pressure at a compressor inlet; receiving the fluid within a cooling chamber; and directing the fluid to the bearing to dissipate heat generated within the bearing.