🔍 Key Concepts

• Power turbine location relative to the gas generator turbine on a marine gas turbine • Where turbine inlet pressure is normally measured (just upstream of the first stage of the turbine it belongs to) • Following the gas flow path from the gas generator turbine discharge into the power turbine

💭 Think About

• On this cutaway, which section drives the ship’s reduction gear/propeller—the gas generator turbine or the power turbine? Look to the right side of the engine and identify that section first. • Trace the hot gas path: after leaving the high‑pressure (gas‑generator) turbine, where do the gases turn and enter the first row of power‑turbine nozzles/blades? That transition region is where inlet pressure is sensed. • Which labeled area (AA, BB, CC, EE) lies immediately upstream of the power turbine’s first stage rather than in the compressor, combustor, or exhaust region?

✅ Before You Answer

• Be sure the spot you pick is between the gas‑generator turbine discharge and the first row of power‑turbine blades, not farther downstream in the exhaust duct. • Confirm that the lettered location you choose is on the hot‑gas path, not in an air, bleed, or oil system passage. • Verify that your chosen label is ahead of (upstream of) the power turbine rotor but still inside the turbine casing where pressure probes could be mounted.