🔍 Key Concepts

• Labyrinth seals in gas turbines • Difference between rotating vs stationary sealing parts • Purpose of sealing between turbine stages (preventing gas leakage around blade tips)

💭 Think About

• Think about which turbine components actually rotate and which remain fixed, and where seals are typically mounted for durability and maintenance. • Consider how a labyrinth seal works: does it rely more on contact or on creating a tortuous path for gas to reduce leakage? • Ask yourself: which combination (rotating vs stationary parts) is most common in high‑temperature, high‑speed turbine stage sealing?

✅ Before You Answer

• Verify which parts of a turbine are stator (stationary) vs rotor (rotating) around the stage interface. • Confirm how labyrinth seals are usually arranged in power and marine gas turbines (what part carries the teeth?). • Check whether injecting compressed air between stages is a primary seal method or more of a secondary/bleed‑air control technique.