23.3.1. Understanding Wind Tunnel Tests

Try these first

1. 1.

   What is the Bernoulli equation used for?

   Hint

   Remember the acronym PVE.

2. 2.

   Define streamlines in fluid flow.

   Hint

   Think of them as the pathways of fluid particles.

3. 3.

   What does Bernoulli's equation help determine in fluid dynamics?

   • Pressure only
   • Velocity and height
   • Pressure
   • velocity
   • and height

   Hint

   Remember, it connects energy principles.

4. 4.

   Is Bernoulli's equation applicable in unsteady flow?

   • True
   • False

   Hint

   Think about the nature of the flow dynamics.

5. 5.

   A fluid flows through a nozzle that has a cross-sectional area of 0.1m². If the fluid has a velocity of 2 m/s at the inlet, and the height difference is 3m, calculate the exit velocity at the nozzle outlet using Bernoulli's equation.

   Hint

   Use conservation of energy principles to relate inlet and outlet conditions.

6. 6.

   Consider an airfoil placed in a wind tunnel with varying pressure readings. If the pressure at the top surface is lower than at the bottom surface, what effect does this have on lift generation?

   Hint

   Recall how pressure differences relate to forces in fluid mechanics.