Consider a high-speed subsonic wind tunnel. The conditions inthe large-diameter section upstream of the test section are V = 228mph and T = 540°R. At the test section, the temperature is 473°Rand the pressure is 2 atm. (a) If a wind tunnel model, placed inthe test section, has a wing chord of 12 in., what is the testReynolds number based on that chord? (b) What is the overall smoothflat-plate skin friction coefficient of the model wing if theboundary later is turbulent? (c) Determine the boundary layerthickness at the trailing edge of the model wing. (d) Calculate theskin friction drag in pounds for a model with a span of 3 ft.
