What is the primary function of the exhaust cone assembly in a turbine engine?

What is the primary function of the exhaust cone assembly in a turbine engine?

• A. Collects exhaust gases and acts as a noise suppressor
• B. Directs gases toward the compressor
• C. Straighten and collect the exhaust gases into a solid exhaust jet
• D. Swirls the exhaust gases into multiple jets

Answer: (C)

The main idea is that the exhaust cone shapes the flow as it leaves the engine. After the turbine, the gases tend to swirl and fan out; the tapered cone guides and straightens this flow so it exits as a single, coherent jet. This streamlining and collection into a solid exhaust jet improves thrust efficiency by directing the gas backward with minimal losses. The other options describe functions that aren’t the primary job of the exhaust cone: it isn’t about directing gas back toward the compressor, creating multiple jets, or primarily acting as a noise suppressor.

The main idea is that the exhaust cone shapes the flow as it leaves the engine. After the turbine, the gases tend to swirl and fan out; the tapered cone guides and straightens this flow so it exits as a single, coherent jet. This streamlining and collection into a solid exhaust jet improves thrust efficiency by directing the gas backward with minimal losses. The other options describe functions that aren’t the primary job of the exhaust cone: it isn’t about directing gas back toward the compressor, creating multiple jets, or primarily acting as a noise suppressor.