How many stages does the high-pressure turbine have on a gas turbine generator?

In a gas turbine generator, the high-pressure turbine commonly has four stages. During operation, the high-pressure turbine extracts energy from the high-temperature, high-pressure gases produced in the combustion chamber. Each stage of the turbine consists of a rotor and a stator blade configuration, allowing for the gradual conversion of thermal energy into mechanical energy. The four stages are designed to optimize efficiency and performance, ensuring that the gas turbine can produce the necessary power output while effectively managing the thermal and pressure dynamics involved in the process. The design is rooted in the need for balance between energy extraction and maintaining the structural integrity of the turbine components under extreme conditions.