12.71 Air flows steadily through a length ( denotes inlet and 2 denotes exit) of insulated constant-area duct. Prop- erties change along the duct as a result of friction. (a) Beginning with the control volume form of the first law of thermodynamics, show that the equation can be reduced to V² m+ 1 = ·m₂ + 2 2 (b) Denoting the constant by ho (the stagnation enthalpy), show that for adiabatic flow of an ideal gas with friction To T constant k-1 =1+ + k=¹M² 2 (c) For this flow does results. To, To? Po, Po? Explain these =

12.71 Air flows steadily through a length ( denotes inlet and 2 denotes exit) of insulated constant-area duct. Prop- erties change along the duct as a result of friction. (a) Beginning with the control volume form of the first law of thermodynamics, show that the equation can be reduced to V² m+ 1 = ·m₂ + 2 2 (b) Denoting the constant by ho (the stagnation enthalpy), show that for adiabatic flow of an ideal gas with friction To T constant k-1 =1+ + k=¹M² 2 (c) For this flow does results. To, To? Po, Po? Explain these =

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

5. The total head of a fan is 185 m and has a static efficiency pressure of 210 mm of water gage.What is the velocity of air flowing if the density of air is 1.15 kg per cubic meter? 8. A coal fired steam boiler uses 3000 kg of coal per hour. Air required for combustion is 15.5 kg ofcoal at barometric pressure of 98.2 KPa. The flue gas has temperature of 285 degree Celsiusand an average molecular weight of 30. Assuming an ash loss of 11% and allowable gas velocityof 7.5 meters per second. Find the diameter of the chimney 9. The gas density is 0.75 kg per cubic meters and air density is of 1.15 kg per cubic meter. If thedriving pressure is 0.25 KPA. Determine the height of the chimney. 10. A powerplant situated at an altitude having an ambient air of 96.53 KPa and 23.88 degreeCelsius. Flue gases at a rate of 5.0 kg per second enter the stack at 200 degree Celsius andleaves at 160 degree Celsius. The flue gases gravimetric analysis are 18% CO2, 7% O2 and 75%N2. Calculate the height of…
3.6. The following information is known about the steady flow of methane through a horizontal insulated duct: Entering stagnation enthalpy = 634 Btu/lbm Leaving static enthalpy = 532 Btu/lbm Leaving static temperature = 540°F Leaving static pressure = 50 psia (a) Determine the outlet velocity. (b) What is the stagnation temperature at the outlet? (c) Determine the stagnation pressure at the outlet.
X Your answer is incorrect. The figure below provides steady-state data for water vapor flowing through a piping configuration where V1 = 35 m/s and T1 = 200°C. At each exit, the volumetric flow rate, pressure, and temperature are equal. P2= 4.8 bar T = 320°C Water vapor (AV)2 = (AV)3 V, T A1 = 0.2 m? Pi = 5 bar 3 P3 = 4.8 bar T3 = 320°C Determine the mass flow rate at the inlet and exits, each in kg/s. i 25.78 kg/s = i 12.89 kg/s m3 = i 12.89 kg/s
The figure below provides steady-state data for water vapor flowing through a piping configuration where V1 = 35 m/s and T1 = 200°C. At each exit, the volumetric flow rate, pressure, and temperature are equal. P2 = 4.8 bar T = 320°C 1 Water vapor (AV)2 = (AV)3 V, T Aj = 0.2 m? P1 = 5 bar 3 P3= 4.8 bar T3 = 320°C Determine the mass flow rate at the inlet and exits, each in kg/s. i kg/s i kg/s i kg/s
FLUID MECH Support your answer with the appropriate solution and diagram. 5. Air at 2.50 kg/m^3 enters a nozzle that has an inlet to exit ratio of 2:1 with a velocity of 120 m/s and leaves with a velocity of 330 m/s. Determine the density of air in kg/m^3 at the exit. A. 1.02 B. 1.82 C. 2.78 D. 4.02
The figure below provides steady-state data for water vapor flowing through a piping configuration where V1 = 20 m/s and T1 = 520°C. At each exit, the volumetric flow rate, pressure, and temperature are equal. P2= 4.8 bar T = 320°C 1 Water vapor (AV)2 = (AV)3 Aj = 0.2 m? P1 = 5 bar 3 P3= 4.8 bar T3 = 320°C Determine the mass flow rate at the inlet and exits, each in kg/s. i ! kg/s n2 = i ! kg/s n3 = i ! kg/s
5. Two gaseous streams enter a combining tube and leave as a single mixture. These apply at the entrance section. Find the speed at section 2, the flow rate and area at section 3. data A1 = 75 in?, V1 = 500 fps, vị = 10 ft³/lb At exit: V3 = 350 fps, v3 = 7 ft³/lb ;A2 = 50 in?, ṁ2 = 16.67 Ib/s, p2 = 0.12 Ib/ft³
4.8: A steam nozzle admits steam at 7 bar and 275 °C. The throat diameter is 5 mm. Expansion of steam upto throat is frictionless. The velocity at throat and exit are 533 m/sec. and 838 m/sec. respectively. The steam leaves the nozzle at 1 Bar. Determine: 1. Throat pressure 2. Exit diameter.
Gas is bled from a tank. Neglecting heat transfer between the gas and the tank, show that mass and energy balances produce the differential equation: dU / H'-U = dm / m Here, U and m refer to the gas remaining in the tank; H' is the specific enthaly of the gas leaving the tank. Under what conditions can one assume H'=H?
Q1) Water flows from a pressurized tank (in figure below), through a 10.0 cm diameter pipe, exits from a 5.0 cm diameter nozzle, and rises 5.0 m above the nozzle. Determine the pressure in the tank if the flow is steady, frictionless, and incompressible. 5.0 m 5 em Air s0 em 10 em Fig. No. I
4.5. Values of pressure (kPa) measured at various stations of a zero-reaction gas turbine stage, all at the mean blade height, are shown in the table given below. Stagnation pressure Nozzle entry 414 Nozzle exit 400 Static pressure Nozzle exit Rotor exit 207 200 The mean blade speed is 291 m/s, inlet stagnation temperature 1100 K, and the flow angle at nozzle exit is 70° measured from the axial direction. Assuming the magnitude and direction of the velocities at entry and exit of the stage are the same, and the axial velocity remains constant, determine the total to total efficiency of the stage. Assume a perfect gas with Cp = 1.148 kJ/(kg °C) and y = 1.333.
dp 1. It shows that the behavior of fluid is A From the equation stated, show the formula for mass flow rate AVp = c. :C.