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Consider steady, adiabatic flow of air through a long straight pipe with A = 0.05 m2. At the inlet section ① the air is at 200 kPa absolute, 60°C, and 146 m/s. Downstream at section ②, the air is at 95.6 kPa absolute and 280m/s. Determine
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Chapter 12 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
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- 4)Carbon dioxide flows steadily through a varying cross-sectional-area duct such as a nozzle shown in the figure. The throat area is (10+0.1*A) cm². The carbon dioxide enters the duct at a pressure of (1400+A) kPa and 200°C with a low velocity, and it expands in the nozzle to a pressure of 200 kPa. The duct is designed so that the flow can be approximated as isentropic. Determine the flow rate in the nozzle. A = LAST DIGIT OF YOUR CLASS ID Stagnation region 1400 - ALPw 200°C CO₂ 1400 P. KParrow_forwardThe refrigerant R134a is passing through the diffuser with the inlet diameter of D1=1 inch; p1=150psi; and V1=1000 ft/s as a saturated vapor. The exit parameters are p2=400 psi, and velocity V2=0.5 ft/s. Heat transfer, Work, and Potential energy changes can be neglected. NOTE: Use English units. For the kinetic energy change do not forget dividing to (778*32.2) conversion factor to obtain Btu/lbm. From NIST tables use BTU/lbm units for the enthalpy. Determine: a.Exit temperature in F; b.Mass flow rate in lbm/s; c.Exit diameter D2 in inches. d.Determine exit temperature.arrow_forwardThe refrigerant R134a is passing through the diffuser with the inlet diameter of D1=1 inch; p1=150psi; and V1=1000 ft/s as a saturated vapor. The exit parameters are p2=400 psi, and velocity V2=0.5 ft/s. Heat transfer, Work, and Potential energy changes can be neglected. NOTE: Use English units. For the kinetic energy change do not forget dividing to (778*32.2) conversion factor to obtain Btu/lbm. From NIST tables use BTU/lbm units for the enthalpy. Determine: a.Exit temperature in F; b.Mass flow rate in lbm/s; c.Exit diameter D2 in inches. d.Determine exit temperature. show and expalin each step pleasearrow_forward
- Q1/ Air enters a compressor at a mass flow rate of 0.04 kg/s with a stagnation pressure of 100 kPa and a stagnation temperature of 400 °C, and it is compressed to a stagnation pressure of 900 kPa. Assuming the compression process to be adiabatic and reversible, find the power required for the compressorarrow_forwardI need the answer as soon as possiblearrow_forward5. A converging nozzle has an exit area of 56 cm². Nitrogen stored in a reservoir is to be discharged through the nozzle to an ambient pressure of 100 kPa. Determine the flow rate through the nozzle for reservoir pressures of: (a) 120 kPa (b) 140 kPa (c) 200 kPa (d) 1 MPa Assume isentropic nozzle flow. In each case, determine the increase in mass flow to be gained by reducing the back pressure from 100 kPa to 0 kPa. Reservoir temperature is 298 K.arrow_forward
- Q3- Air flows from a reservoir and enters a uniform pipe with a diameter of 0.05 m and length of 10 m. The air exits to the atmosphere. The following conditions prevail at the exit: P2 = 1bar, temperature T2 = 27°C and M2 = 0.9. Assume that the average friction factor to be f = 0.004 and that the flow from the reservoir up to the pipe inlet is essentially isentropic Estimate the total temperature and total pressure in the reservoir under the Fanno flow model. %3D M2 0.9 D-0.05 m] L=10 m Po=? To=C T2-27°C P2=1|Bar]arrow_forwardIdeal gas Oxygen (O2) flows through a well-insulated (adiabatic) nozzle. The cross-section of the nozzle is circular and has a diameter of 15 cm at Station 1. Also, at Station 1 the flow has a pressure of 300 kPa, a temperature of 400 Kelvin, and a velocity of 20 m/sec. At Station 2, the temperature is 390 Kelvin. Friction can be neglected. Find the following:arrow_forward3. In figure shown, pipes 1 and 2 are of diameter 3 cm, D3 = 4 cm. Alcohol (SG = 0.80) enters section 1 at 6 m/s while water enters at section 2 at 10 m/s. Assuming ideal mixing of incompressible fluids, compute the exit velocity and density of the mixture at section 3. The temperature is 20°C. Answer: 9 m/s, 928 kg/m3 (2) Ideal mixing (3) V₂-P3arrow_forward
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