What defines the inlet system of a gas turbine?

The inlet system of a gas turbine is designed to condition and protect the compressor. This part of the turbine ensures that the air entering the compressor is at the appropriate temperature and pressure, and it also filters out contaminants such as dust and debris. Proper conditioning of the air is critical for maintaining the efficiency and reliability of the entire gas turbine system.

By protecting the compressor from damaging particulates and temperature extremes, the inlet system plays a vital role in enhancing the overall performance and longevity of the gas turbine. This is particularly important because the compressor is one of the most critical components in the gas turbine cycle, and any damage to it can lead to decreased performance and increased maintenance costs.

The other choices do not accurately reflect the primary function of the inlet system. For instance, cooling of exhaust air relates more to the exhaust system of the turbine, while combustion occurs in the combustion chamber, not the inlet. Ejecting hot gases pertains to the exhaust system as well, highlighting that each compartment of the turbine has specialized functions.