Patent ID: 7823390

Claim:
A system for directing air from plural ports in a compressor to provide cooling and/or sealing air to an associated turbine site, the system comprising: a first flow from a pressure stage of the compressor, said first flow having a first pressure and a first temperature, a second flow from another pressure stage of the compressor having a second pressure and a second temperature, wherein said second pressure and temperature are different than said first pressure and temperature, an ejector having a first inlet for receiving the first flow and a second inlet for receiving the second flow, said ejector having an ejector output for combining the first and second flows into a third flow, said third flow having a third pressure and a third temperature, wherein said third pressure and temperature are different from said first and second pressures and temperatures, a bypass line connected between said first flow and said third flow, said bypass line providing a bypass flow, a mixer for combining the bypass flow and the third flow to provide a fourth flow, said mixer comprising an inner section and an outer section, said inner section generally cylindrical in cross section and having a plurality of holes circumferentially disposed therein, each of said holes having an axial direction, said fourth flow having a pressure and temperature intermediate the pressure and temperature of said bypass flow and said third flow, said mixer having a first mixing input receiving the third flow, and a second mixing input receiving the bypass flow, wherein an angle between the axial direction of each of the holes and the direction of said third flow, is more than 0 degrees and less than 90 degrees.