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- 35 + 9.81 (0.3824 - 7-2) = - 49.54 kPa. S. Chand Je oadall i.e.p =- 49.54 kPa. This shows that the given pressure at A, 35 kPa is gauge pressure and hence there is vacuum at point B. (Ans.) Example 6.5. An open circuit wind tunnel draws in air from the atmosphere through a well contoured nozzle. In the test section, where the flow is straight and nearly uniform, a static pressure tap is drilled into the tunnel wall. A manometer connected to the tap shows that the static pressure within the tunnel is 45 mm of water below atmosphere. Assume that air is incompressible and at pressure is 100 kPa (absolute). Calculate the velocity in the wind tunnel section (Refer to Fig. 6.6). Density of P.- 100 kPa water is 999 kg/m' and characteristic gas constant for V =0 air is 287 J/kg K. ساP حقوق النشر Test section 25°C. = 25°C (GATE)35 + 9.81 (0.3824 - 7-2) = - 49.54 kPa. S. Chand e oladall i.e.Pg =- 49.54 kPa. This shows that the given pressure at A, 35 kPa is gauge pressure and hence there is vacuum at point B. (Ans.) Example 6.5. An open circuit wind tunnel draws in air from the atmosphere through a well contoured nozzle. In the test section, where the flow is straight and nearly uniform, a static pressure tap is drilled into the tunnel wall. A manometer connected to the tap shows that the static pressure within the tunnel is 45 mm of water below atmosphere. Assume that air is incompressible and at pressure is 100 kPa (absolute). Calculate the velocity in the wind tunnel section (Refer to Fig. 6.6). Density of P.= 100 kPa water is 999 kg/m' and characteristic gas constant for V =0 air is 287 J/kg K. ساP حقوق النشر 25°C, Test section = 25°C (GATE)Answer this as fast as you can but answer should be correct (correct answer is priority) Air leaks slowly to atmosphere from a pressurized tank at 19 bar (gage) and 27°C through a hole of diameter 2 mm. The tank volume is 1 m3. Atmospheric conditions are 100 kPa and 27°C. Determine the time for the tank pressure to decrease to 100 kPa (gauge).
- Q.3: A natural gas with a specific gravity of 0.75 has a measured gas formation volume factor of 0.00529 ft³/Scf at the current reservoir and temperature. Calculate the density of the gas. pressureA pump is cavitating at its inlet (i.e., on the suction side). The fluid is water at 120°F. The atmosphericpressure is 0.9 bar. What is the gage pressure of the water in units of kPa?A sylo can contain 3.75*10^4 lb of liquid. (a) What volume would this much water take? Dw= 62.4 lb/ft.*3
- Ex: Determine the vapour pressure difference across a wall when the air inside the house is at 20°C at 60% RH and the Saturated Vapour Pressure, Density of Water Temperature Saturated Vapour Saturated Vapour (°C) outside air is -10°C at 40% RH. (OF) Pressure (kPa) Density (g/m³) -10 14 0.29 2.36 32 0.61 4.85 41 0.87 6.8 10 50 1.23 9.4 11 51.8 1.31 10.01 12 53.6 1.4 10.66 55.4 14 13 1.5 11.35 57.2 1.6 12.07 15 59 1.7 12.83 20 68 2.34 17.3 25 77 3.17 23 30 86 4.24 30.4 40 104 7.37 55.3 60 140 19.91 149.4 80 176 47.33 355.1 This vapour pressure is what drives the water vapour though a wall. |近In a condenser containing air and water, the air pressure is 22 kPa absolute. What is the gage pressure in kPa at a point 1.25 m below the water surface?Question 46 Air is kept in a tank at pressure Po = 689 KPa abs and temperature To = 17°C. If one allows the air to issue out in a one-dimensional isentropic flow, the flow per unit area at the exit of the nozzle where P = 101.325 KPa is Blank 1 kg/m²-s. For air, Use R = 287 J/kg-K and Mol. Wt. = 29.1 *Express your answers in whole significant figure without decimal value and without unit* Blank 1 Add your answer
- A 4 m high tank is filled with diesel. If the nozzle of the bubbler system is located 3 meters below the surface of the liquid, what minimum pressure (in kPa) should the bubbler system provide to produce bubbles? The specific gravity of diesel is 0.85. a. 25.0 b. 30.0 C. 35.0 d. Answer is not among the choicesFor completely specification of 1 superheated vapour one needed... * O pressure pressure as well as temperature O Specific volume O temperaturesThe question is important, Answer it correctly. 1. A ventilation fan is moving 3,200 cfm with a fan static pressure of 8.30" wg. The airflow is increased to 3,500 cfm by increasing the fan speed. What is the new static pressure of the fan?