Practice Equation For Displacement Thickness (2.5) - Boundary Layer Theory (Contd.,)

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9 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define displacement thickness.
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Think about what happens to flow close to surfaces.
Question 2.
What is the momentum thickness a measure of?
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Connect it to what happens to flow near a plate.
3Question 3.
What does displacement thickness indicate?
- Velocity difference
- Mass flow
- Streamline displacement
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Think about the effect on flow lines.
4Question 4.
True or False: Momentum thickness measures energy loss.
- True
- False
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Remember the definitions of thickness types.
Question 5.
Given a velocity profile of u/U = 3y/δ - 2(y/δ)^2, calculate the displacement thickness.
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Look for patterns in the integration steps.
Question 6.
In a case where a thick boundary layer affects a plane's wing performance, discuss how to optimize the design considering displacement thickness.
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Apply the concept of minimizing viscous drag using shape adjustments.

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