Which component experiences the highest temperature in the described mass airflow path?

• A. Diffuser
• B. Turbine
• C. Burner
• D. Compressor

Answer: (C)

In this gas turbine path, heat is added where combustion occurs. The compressor raises the air pressure and temperature somewhat, but the major temperature rise happens in the burner as fuel is burned with the compressed air, producing hot, high-energy gases. That combustion process creates the hottest thermal environment along the flow path. The diffuser mainly slows the flow without heating it much, and the turbine must handle those hot gases, but its surfaces are cooled and the peak heat is generated in the burner. Therefore, the component experiencing the highest temperature is the burner.