Practice Flow Conditions (3.2) - Compressible Flow

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is the Mach number for subsonic flow?
Show hintHide hint
Think about numbers smaller than 1.
Question 2.
What is choked flow?
Show hintHide hint
Recall the threshold at which mass flow rate reaches its max.
3Question 3.
What happens to the velocity of a subsonic flow when the area of the nozzle decreases?
- Velocity decreases
- Velocity increases
- Velocity remains constant
Show hintHide hint
Recall the area-Velocity relationship in nozzles.
4Question 4.
Choked flow occurs when the Mach number reaches what value?
- True
- False
Show hintHide hint
Think of when flow is maximized at the throat.
Question 5.
Design a nozzle that maximizes airflow for an aircraft flying at Mach 2. Specify the dimensions needed to achieve choked flow.
Show hintHide hint
Consider aspects of nozzle tapering and area fluctuations to facilitate a smooth transition.
Question 6.
If a nozzle has a throat area of 0.1 m² and operates at choked flow, calculate the mass flow rate given the air density ρ as 1.225 kg/m³.
Show hintHide hint
Make sure to apply the correct principles of fluid flow.

4 more questions in this section. Enroll free to practise them all.