| 摘要 |
A high compression ratio compressor having multiple stages of airfoils to produce the high pressure rations, where the last stage airfoils are cooled by passing cooling air through the airfoils without discharging film cooling air. The cooling air for the airfoils is bled off from an upstream stage of the compressor, passed through the airfoil to provide for the cooling, and then discharged back into the compressor at a stage upstream of where the bleed off air was extracted and where the pressure is lower. Because of the high pressure rations, the air temperature in the compressor is at such a high temperature that the last stage airfoils must be cooled to prevent thermal damage. |
