click below
click below
Normal Size Small Size show me how
Turbine air sys O&P
| Question | Answer |
|---|---|
| What is meant by a convergent inlet duct for a turbine engine? | 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? | 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? | bell-mouthed |
| Why do some turbine engines use variable inlet guide vanes? | 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. |