A Pitot–static probe is placed in an open-circuit wind tunnel to measure the speed of…

PHYSICS · Multi-part · AP · Physics 1: Algebra-based · Fluids · Fluids

Problem

A Pitot–static probe is placed in an open-circuit wind tunnel to measure the speed of air (density

1.2\,\text{kg\,m}^{-3}

). The stagnation and static pressure tappings are connected to a water manometer (density

1000\,\text{kg\,m}^{-3}

). When the tunnel is running steadily, the difference between the water levels in the limbs is

25\,\text{mm}

. (i) Calculate the speed of the air stream in the tunnel. (ii) Compute the dynamic pressure of the air corresponding to this speed, in

\text{N m}^{-2}