Patent ID: 8475112
Filing Date: 2013-07-02
Classification: F02C,F04D,F05D,Y02T

Abstract:
1. A multiple stage compressor comprising: a plurality of stages of airfoils; the last stage of airfoils having heat pipe to provide cooling for the airfoil; a heat pipe extending into the last stage airfoil to draw heat away from the last stage airfoil; a heat exchanger associated with the heat pipe to draw heat away from the heat pipe; a cooling air supply passage to supply cooling air to the heat exchanger; the cooling air supply passage connected to a stage of the compressor having a lower pressure than the last stage airfoil; a cooling air discharge passage to discharge spent cooling air from the heat exchanger of the last stage airfoil; and, the cooling air discharge passage connected to a different stage of the compressor having a lower pressure than the stage supplying the compressor cooling air to the last stage airfoil.