Pitot Tube
About the Lecture
The lecture Pitot Tube by Jared Rovny, PhD is from the course Fluids.
Included Quiz Questions
A Pitot tube is used to determine what measurement?
- The speed of the flowing fluid, using the difference between the total and static pressure measured by the Pitot tube
- The density of the fluid
- The total pressure, by knowing the static pressure and the speed of the fluid measured by the Pitot tube
- Only the static pressure of the fluid is measured by a Pitot tube
- Only the total pressure of the fluid is measured by a Pitot tube
In the equation for speed of a fluid in terms of the total pressure P_t = P + 1/2 ρv² and static pressure P_s = P of the fluid: v = √[2(P_t - P_s)/ρ], what would happen if P_t were less than P_s?
- P_t can never be less than P_s, because the dynamic pressure is always greater than or equal to zero.
- The speed would acquire a minus sign, indicating flow in the opposite direction.
- The speed of the fluid becomes an imaginary number, indicating flow has become turbulent.
- The speed of the fluid in this case cannot be determined using this equation and more advanced calculations are needed.
- In this case the absolute value of the difference is considered in order to keep the expression under the square root positive.
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Author of lecture Pitot Tube
Jared Rovny, PhD
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