Which section provides the second stage of compression, combustion, and first stage of expansion?

Which section provides the second stage of compression, combustion, and first stage of expansion?

• A. Gas Generator High Pressure Section
• B. Gas Generator Low Pressure Section
• C. Power Turbine
• D. Axial Compressor Assembly

Answer: (A)

The section that handles the second stage of compression, the combustion process, and the first stage of expansion is the gas generator high-pressure section. In a two-spool gas turbine, air first passes through the low-pressure compressor for the initial compression, then goes through the high-pressure compressor for the second, more intense compression. After that, fuel is injected and burned in the combustor. The resulting hot gases then expand first through the high-pressure turbine, which is the first expansion stage. This entire sequence—second compression, combustion, and first expansion—occurs within the high-pressure portion of the gas generator, making it the correct choice. The other sections cover either the initial compression only, the energy extraction for the load (power turbine), or just the compressor portion.

The section that handles the second stage of compression, the combustion process, and the first stage of expansion is the gas generator high-pressure section. In a two-spool gas turbine, air first passes through the low-pressure compressor for the initial compression, then goes through the high-pressure compressor for the second, more intense compression. After that, fuel is injected and burned in the combustor. The resulting hot gases then expand first through the high-pressure turbine, which is the first expansion stage. This entire sequence—second compression, combustion, and first expansion—occurs within the high-pressure portion of the gas generator, making it the correct choice. The other sections cover either the initial compression only, the energy extraction for the load (power turbine), or just the compressor portion.