Air is flowing through a venture-meter whose diameter is 2.6 in at the entrance part (location 1) and 1.8 in at the throat (location 2). The gage pressure is measured to be 12.2 psia at the entrance and 11.8 psia at the throat. Neglecting frictional effects, show that the volume flow rate can be expressed as and determine the flow rate of air. Take the air density to be 0.075 lbm/ft3.

Looking for a neat solution using a paper sheet.

20.3 cm diam 2.44 m 1.22 m Water Air at 105 kPa and 37°C flows upward through a 6-cm-diameter inclined duct at a rate of Q (L/s). The density of air at this temperature and pressure is 1.10 Kg/m³. The duct diameter is then reduced to 4 cm through a reducer. The pressure change across the reducer is measured by a water Air manometer. The elevation difference between the two points on the pipe where the two arms of the manometer are attached is 0.20 m. Determine the differential height between the fluid levels of the two arms of the manometer. Q (L/s) 90

Water vapor enters a Lule with an input cross-sectional area of 0.02 m2 at a temperature of 1.8 MPa and 400C. Water vapor passes through the Lule with a flow of 5 kg/s, and in this process there is a heat loss of 2.8 kJ / kg from the Lule. If the pressure at the outlet is 1.4 MPa and the speed is 275 M/s, find the speed at which the water vapor enters the Lule and the temperature at the outlet of the Lule.