In a dual axial-flow compressor, which component does the first stage turbine drive?

In a dual axial-flow compressor, the first stage turbine drives the N(2) compressor. This is because, in a typical dual-spool turbofan engine configuration, the engine has two separate shafts and compressors: the high-pressure compressor, often referred to as the N(2) compressor, and the low-pressure compressor, known as the N(1) compressor.

The first stage turbine is connected to the high-pressure spool, allowing it to efficiently drive the N(2) compressor, where it compresses air for combustion at higher pressure. This arrangement improves overall engine efficiency and performance, given that each spool can optimize its operating conditions.

The N(1) compressor is associated with the low-pressure turbine, which is driven by the second turbine stage. The fan rotor generally receives its drive from the low-pressure turbine, and the exhaust turbine is not a distinct component that is directly driven by the first stage turbine. Therefore, the correct association of the first stage turbine driving the N(2) compressor is key to understanding the configuration and operation of dual axial-flow compressors in turbine engines.