GE Gas turbine components and operation

Key Takeaways

• The GE MS-9001E gas turbine utilizes a 17-stage axial flow compressor with variable inlet guide vanes to achieve a 12:1 pressure ratio, increasing air velocity and then converting kinetic energy to pressure.
• The compressor rotor consists of 17 stages of airfoil-shaped blades attached to wheels, held together by tie bolts, with specific spacer arrangements for rotor-stator positioning.
• The compressor stator comprises inlet, forward, aft, and discharge casings, with the bell mouth directing air uniformly and variable guide vanes controlling airflow volume.
• The discharge casing acts as a structural keystone, connecting the compressor to the turbine, housing diffuser elements to convert kinetic energy into pressure, and supporting the combustion system.
• The reverse flow combustion system features 14 can annular chambers where compressed air mixes with fuel (gas or liquid) and burns, generating hot gases to drive the turbine.
• Key components of the combustion system include the wrapper forming a plenum, fuel nozzles for dual fuel capability, liners, flow sleeves, transition pieces, and flame detection systems.
• Sealing mechanisms, including labyrinth and brush seals, are critical for controlling air leakage within the compressor and between components, impacting efficiency and cooling.
• The turbine section, though not detailed in this segment, receives hot gases from the combustion system, with its first stage nozzles supported by the discharge casing.