Variable stator vanes give an axial gas...

Variable stator vanes give an axial gas...

Question 1 of 2921866636eed28f7522a1c51e412

Variable stator vanes give an axial gas turbine compressor which of the following capabilities?

Question 1 of 29218

Q

Variable stator vanes give an axial gas turbine compressor which of the following capabilities?

🔍 Key Concepts

• How variable stator vanes change the angle at which air enters the rotor blades • The relationship between compressor speed, airflow, and efficiency in an axial compressor • Why compressors can surge or stall at off‑design speeds without some form of flow/angle control

💭 Think About

• Think about what problem variable stator vanes are designed to solve when the turbine is not operating at its design speed. • Which option directly relates to keeping the angle of attack on compressor blades within an efficient range across different RPMs? • Ask yourself: do variable stator vanes primarily increase maximum pressure, maximum airflow, or do they make existing stages work better over a wider operating range?

✅ Before You Answer

• Compare options that talk about efficiency over a range of speeds versus those that talk about maximum values like pressure ratio or airflow. • Consider which function helps prevent compressor stall/surge when the engine is throttled up or down. • Verify in your notes how changing stator vane angle affects flow direction into the rotor and how that ties to off‑design speed operation.