Pitot Tube

Bogor Chemical Analyst Vocational High School2012

Group 4

Nur AzizahNoviani Ester

Nurul Maulida RMuhammad RamadhanEleven One

Definition

Pitot tube is an instrument that use to measure the pressure and flow rate

of fluid (air)

Created ByAn Engineer from France named Henri Pitot in the beginning of 1700 and modified to modern design in the middle of 1800 by France Scientist named Henry Darcy

Henri Pitot

Work Principle

Pitot Tube

With measuring the height differences of mercury in the manometer, the velocity of fluid can be determined in the pitot tube.

P = Pressure (Pa)p = density (kg/m3)

p’ = density Hg (kg/m3)g = gravitation (m/s2)

h = high (m)v = velocity (m/s)

Pitot Tube Formula

APPLICATION

• Measure air speed on the airplane.• Determine the amount of coolant that was in

the room to tell at a hotel.• Determine the speed of the wind in the

tunnel.• Venturimeter with manometer

Pitot Tube ApplicationOne the Application of pitot tube is on the plane’s altimeter. Altimeter’s function is to measure height of one point from the sea surface

Pitot Tube

How to work?Plane’s Altimeter

Sample Question

If air (p = 129 kg/m3) flowed into the pipe pitot, and the difference in height of mercury (pHg = 13.6 g/cm3)

at the manometer 3 cm.Calculate the air flow speed!

Known : p = 129 kg/m3

p’ = 13,6 g/cm3

g = 10m/s2)h = 3 cm

Ask : v…?

Answer :

Conclusion• Pitot tube is an instrument that use to measure the

pressure and flow rate of fluid (air)• The same manometer feet high, then h1 = h2• The air that is flowing at first much smaller tubes,

then v1=0• Has this formula :

Any Question ?