4) The uniform ow in the t3\" Honeycomb Screen Contraction sections of wind tunnels is created by the combination 1 of a \" aw calming chamber\" and a contraction (with an area ratio of 4 and W )" a loss coefcient KN = 0.04) upstream of the test section. The ow calming chamber Section \"honeycomb," an array of thin smooth-walled round straws (of diameter d = 0.4 cm and length L = 0.2 m), followed by a ne screen (with pressure drop Aps = 7 kPa across the screen). Assume that the flows upstream of the honeycomb and downstream of the contraction are uniform. Find the pressure drop across the honeycomb Apt, by considering the flow through a single straw. Then determine the (minor) loss ij across the honeycomb, the ne screen and the contraction. You may neglect all entrance/exit-type minor losses. Next, nd the total major loss [m]- due to the 1.7 m total length of Euare duct from Section 1 up to (but not including) the contraction if the wind tunnel is made of galvanized iron, and the test section after the contraction has dimension W = 0.15 m and a freestream speed U = 28.8 m/s. Finally, how does your value for minor loss [ml-n compare to that for major loss mj? 4} dip], = 51.? Pa Pressure drop across heneycnmh 13m = 5T5!) 12:11st Net minor loss due to honeycnmb, screen, enntrsetien Em. =2.E riffs2 Major less due to straight pieces ufduei from 1 to 2 13 :uev- 45m- Miner lesses E \"minor\