| 摘要 |
<p>A turbine cooling system is provided, having a compressor (20) for supplying cooling air, a forward turbine rotor wheel space (50), a high-pressure packing seal (HPPS) bypass cavity (60), and a metering device (46). The forward turbine rotor wheel space (50) is cooled by the cooling air supplied by the compressor. The HPPS bypass cavity (60) is in fluid communication with and receives a portion of the cooling air from the compressor, and is in fluid communication with and supplies the cooling air to the forward turbine rotor wheel space. The metering device (46) is in operable communication with the forward turbine rotor wheel space (50) and the HPPS bypass cavity (60) to modulate the cooling air supplied to the forward turbine rotor wheel space from the HPPS bypass cavity. The metering device modulates the cooling air based on at least one operating condition of the turbine.</p> |
