Turbine Engine Air Systems Flashcards
What is meant by a convergent inlet duct for a turbine engine?
A convergent duct is one whose cross-sectional area becomes smaller in the direction the air flows.
What is meant by a divergent inlet duct for a turbine engine?
A divergent duct is one whose cross-sectional area becomes greater in the direction the air flows.
What kind of inlet duct is often used on turbine-powered helicopters?
A bell-mouthed inlet duct.
Why do some turbine engines use variable inlet guide vanes?
These variable inlet guide vanes are automatically adjusted to direct the air into the engine in such a way that it keeps the RPM vs. velocity proper for the most efficient operation.
How do some turbine engines prevent ice formation on the inlet guide vanes?
Hot compressor bleed air flows through hollow inlet guide vanes.
