A wind tunnel is a large apparatus used for scale model testing of various objec

Question

A wind tunnel is a large apparatus used for scale model testing of various objects through a fluid flow field. The largest in the world is the National Full-Scale Aerodynamics Complex at NASA Ames Research Center in Moffitt Field, California. Suppose you are testing a scale model in an open-circuit tunnel at NASA Ames. Atmospheric pressure is 98.7 kPa (abs) and the temperature is 27 degrees Celsius. Determine the pressure at the stagnation point on the nose of the airplane. Why is this answer significant? Determine the manometer reading, h, for the manometer attached to the static pressure tap within the test section of the wind tunnel if the air velocity within the test section is 50 m/s

Explanation / Answer

The pressure will be 2720 Pa

The monometer reading will correspond to the pressure at the test point

We know that

rho airV2 = rho liquid g * h

Density of air is 1.225 kg/m3

1.225 * 2500 = 13600*10 *h

h = 2 cm

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