The inlet contraction and test section of a laboratory wind tunnel are shown. The air speed in the test section is U=50 m/s. A total-head tube pointed upstream indicates that the stagnation pressure on the test section centerline is 10 mm of water below atmospheric. The laboratory is main- tained at atmospheric pressure and a temperature of -5C. Evaluate the dynamic pressure on the centerline of the wind tunnel test section. Compute the static pressure at the same point. Qualitatively compare the static pressure at the tunnel wall with that at the centerline. Explain why the two may not be identical. Flow Contraction U = 50 m/s -> Test section