For an open-circuit suction type circular cross section wind tunnel operating at an atmospheric pressure of 100 kPa, (air density is 1.225 kg/m3) (kinematic viscosity of air is 1.48 * 10'5 mzls) Contraction Ratio: 10 Diameter of the Test section: 340 mm Diffuser length: 226 cm, half-diffuser angle: 2.5 degrees Fan efciency: 90% Power Input during operation of wind tunnel: 420 Watts (Assume no pressure losses in the wind tunnel) a) Calculate the Area ratio (AR) of the diffuser. (2 points) b) When a static pitot-tube placed in the test section with a manometer (manometer uid is water), what should be the differential height (in cm; between the manometer arms. (2 points) c) Calculate the mass ow rate (kg/s2 in the wind tunnel. (2 points) d) Calculate the veloci (m/sz at the entrance of contraction chamber, at the test section and at the exit of the diffuser (before the fan). Plot the variation of velocity throughout the wind tunnel roughly using the calculated values (2.5 points) e) Calculate the static (gage) pressure (Pa) at the entrance of contraction chamber, at the test section and at the exit of the diffuser (before the fan). Plot the variation of the static (gage) pressure throughout the wind tunnel roughly using the calculated values. (2.5 points) i) If a at plate with the same length as the test section is placed in the test section. The Reynolds number for the at plate is calculated as 8 * 105. What should be the lenggh at the test section (in mm). (2 points) g) If you want to test a crossow over a horizontal cylinder of length 100 mm in the test section, what would be the ideal diameter at cylinder (in mm) to avoid the blockage effects. (2 points)