24.5.3. Stagnation Pressure

Try these first

1. 1.

   What are the two components of stagnation pressure?

   Hint

   Think about pressure that acts when fluid is at rest.

2. 2.

   What does a Pitot tube measure?

   Hint

   Consider devices used in aviation.

3. 3.

   What is stagnation pressure?

   • A sum of only static pressure
   • A sum of static and dynamic pressure
   • A measure of velocity pressure

   Hint

   Think about how pressure is affected when flow stops.

4. 4.

   True or False: The hydraulic gradient line includes dynamic pressure.

   • True
   • False

   Hint

   Remember what each gradient line represents.

5. 5.

   An aircraft is flying at a speed of 150 m/s at an altitude where the local air pressure is 75 kPa. Determine the stagnation pressure experienced if the air density is 1.225 kg/m³.

   Hint

   Consider how pressure changes as the aircraft moves through the air.

6. 6.

   Evaluate the implications of energy losses in a pipe when considering stagnation pressure. How might this affect fluid flow in terms of efficiency?

   Hint

   Think about the factors affecting fluid movement in systems.