What percentage of total pressure energy does the turbine absorb?

The correct choice indicates that the turbine absorbs 60-80% of total pressure energy. The turbine operates within a gas turbine engine where it extracts energy from the high-temperature, high-pressure gases produced by combustion. This process involves converting a significant portion of the thermal and pressure energy in the exhaust flow into mechanical energy, which then drives the compressor and other accessories of the engine.

The turbine is designed to efficiently harness energy from the airflow, which is a critical component in maintaining the engine’s operational cycle. The 60-80% range reflects the efficiency with which the turbine converts pressure energy into work, ensuring that a large portion of the available energy is utilized effectively. This efficiency is crucial for ensuring optimal performance and reducing fuel consumption, contributing to overall engine efficiency. Understanding this percentage is vital for evaluating the performance characteristics of gas turbines and the design considerations that affect energy extraction capabilities.