3. Propulsion
Gas Turbine Engines — Quiz
Test your understanding of gas turbine engines with 5 practice questions.
Practice Questions
Question 1
What is the primary function of variable stator vanes in a multistage compressor?
Question 2
What is the primary purpose of the fan in a high-bypass turbofan engine?
Question 3
Given an inlet mass flow rate of $\dot m=120\:\mathrm{kg/s}$, flight speed $V_0=250\:\mathrm{m/s}$, and exhaust speed $V_e=550\:\mathrm{m/s}$, what is the net thrust $F$ (neglecting pressure thrust)?
Question 4
In the propulsive efficiency formula $\eta_p=\frac{2V_0}{V_0+V_e}$, at what relationship between $V_e$ and $V_0$ is $\eta_p$ maximized?
Question 5
What is the specific thrust of an engine producing $F=20\,000\:\mathrm{N}$ with mass flow $\dot m=80\:\mathrm{kg/s}$?