Definition
One pair of turbine components in a turbine engine, consisting of a row of stationary nozzle vanes (stators) followed by a row of rotating turbine blades on a disk. The stator vanes direct and accelerate the hot gas onto the rotating blades, which extract energy from the gas to drive the compressor and accessories. A turbine engine may have one or several stages arranged in sequence along the shaft.
Plain English
A turbine stage is one set of fixed guide vanes paired with one wheel of spinning blades inside a jet engine. Each stage takes a bite of energy out of the hot exhaust gas to keep the engine running.
Context Anchor
Seen in turbine engine descriptions, engine maintenance manuals, and discussions of how jet and turboprop engines produce power.
Derivation
Stage' comes from the Latin 'stare', meaning 'to stand' or 'a step'. In engineering, a stage is one step in a series of similar steps. Each turbine stage is one step in the process of extracting energy from the exhaust gas.
Why Pilots Care
Each stage contributes to overall engine efficiency and thrust; knowing the number of stages helps pilots understand engine ratings and limitations.
Intuition Check
A turbine stage is not a phase of flight or a power setting. It is a physical section inside the engine, made of parts that guide and capture energy from hot gas.
Example Sentence 1
The inspection report noted minor erosion on the first-stage turbine blades but no damage to the second stage.
Example Sentence 2
Mechanics inspect each turbine stage for blade damage during overhaul.