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Points: 2 15. Multiple Choice: Q15: The velocity of the airstream decreas... The velocity of the...
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be...
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Air at 80 kPa and 127°C enters an adiabatic diffuser steadily at a rate of 5400 kg/h and leaves at 100 kPa. The velocity of the airstream is decreased from 230 m/s to 30 m/s as it passes through the diffuser. The gas constant of air is 0.287 kPa·m3/kg·K. The enthalpy of air at the inlet temperature of...
Air steadily enters the diffuser section of a jet engine at a velocity of 270 m/s...
Air steadily enters the diffuser section of a jet engine at a velocity of 270 m/s at 85 kPa and at 250 °C. There is heat addition from the diffuser walls to the air. The air exits the diffuser at 1/3 of its inlet velocity. The heat addition per kg air entering the diffuser is 13 kJ/kg. What is the change in the specific enthalpy of the air (kJ/kg)?
thermodynamics: Diffusers, find the exit velocity ..
Air at 80 kPa, 27 degrees C and 220 m/s eneters a diffuser at a rate of 2.5 kg/s and leaves at 42 degrees C. the exit area of the diffuser is 400 cm2.the air is estimated to lose heat at a rate of 18 kJ/s during this process.Determine-The exit velocity-The exit pressure of the air
Problem-2 (200) Air at 30 kPa, 200 K, and 250 m/s enters a turbojet engine in...
Problem-2 (200) Air at 30 kPa, 200 K, and 250 m/s enters a turbojet engine in flight. The air mass flow rate is 28 kg/s. The compressor pressure ratio is 13, the turbine inlet temperature is 1460 K, and air exits the nozzle at 30 kPa. The diffuser and nozzle processes are isentropic, the compressor and turbine have isentropic efficiencies of 81% and 88%, respectively, and there is no pressure drop for flow through the combustor. Kinetic energy is negligible...
Air at 10 degree C and 80 kPa enters the diffuser of a jet engine steadily...
Air at 10 degree C and 80 kPa enters the diffuser of a jet engine steadily with a velocity of 200 m/s. The inlet area of the diffuser is 0.4 m^2.The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Determine the mass flow rate of the air and the temperature of the air leaving the diffuser. Air at 100 kPa and 280 K is compressed steadily to 600 kPa and 400 K....
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves...
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
Fundamentals-of-Compressible-Fluid-Dynamics Balachandran CHAPTER 4 6. A conical diffuser of 15 cm...
Fundamentals-of-Compressible-Fluid-Dynamics Balachandran CHAPTER 4 6. A conical diffuser of 15 cm has an area ratio of 4. If the pressure, temperature and velocity at the inlet section are 0.69 bar, 340 K and 180 m/s, estimate the exit pressure and exit velocity. What will be the change in impulse function. [Ans. p2 = 0.8074 bar; V2 = 45 m/s; F2 - F1 = 4167.5 N] 7. The Mach number at inlet and exit of a supersonic diffuser are 3 and...
Question 2 (30 marks) (a) A fluid flowing into a nozzle with specific enthalpy of 2980...
Question 2 (30 marks) (a) A fluid flowing into a nozzle with specific enthalpy of 2980 kJ/kg and the velocity is 80 m/s. At the exit of the nozzle, the specific enthalpy of the fluid drops to 2670 kJ/kg. The nozzle orientation is horizontal and the heat loss is negligible. Given that the nozzle inlet area is 0.25 m2 and the specific volume of the fluid is 0.2 m2/kg, calculate the velocity of the fluid at exit, the mass flow...
Refrigerant 134a enters a compressor with a mass flow rate of 15 kg/s with a velocity...
Refrigerant 134a enters a compressor with a mass flow rate of 15 kg/s with a velocity of 10 m/s. The refrigerant enters the compressor as a saturated vapor at 10°C and leaves the compressor at 1400 kPa with an enthalpy of 281.39 kJ/kg with a negligible velocity. The rate of work done on the refrigerant is measured to be 380 kW. If the elevation change between the compressor inlet and exit is negligible, determine the rate of heat transfer associated...
Part I: Multiple Choice Problems 1. (3 points) A wave with displacement D(z.t) (12 cm) sin...
Part I: Multiple Choice Problems 1. (3 points) A wave with displacement D(z.t) (12 cm) sin (2z -211), where z is in down a string composed of two segments: one with line and t is in seconds, travels density p-0.2 kg/m, and the other with p2 0.5 kg/m. What is the frequency (A to μ2? oscillations after the wave crosses the boundary from (a) 1.7 ㎐ (b) 2.9 Hz (c) 3.3 Ha (d) 110 Hz 2. (5 points) A siren...
Problem-2 (200) Air at 30 kPa, 200 K, and 250 m/s enters a turbojet engine in flight. The air mass flow rate is 28 kg/s. The compressor pressure ratio is 13, the turbine inlet temperature is 1460 K, and air exits the nozzle at 30 kPa. The diffuser and nozzle processes are isentropic, the compressor and turbine have isentropic efficiencies of 81% and 88%, respectively, and there is no pressure drop for flow through the combustor. Kinetic energy is negligible...
Air at 10 degree C and 80 kPa enters the diffuser of a jet engine steadily with a velocity of 200 m/s. The inlet area of the diffuser is 0.4 m^2.The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Determine the mass flow rate of the air and the temperature of the air leaving the diffuser. Air at 100 kPa and 280 K is compressed steadily to 600 kPa and 400 K....
5-30 Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm². Determine (a) the mass flow rate through the nozzle, (b) the exit temperature of the air, and (c) the exit area of the nozzle. Answers: (a) 0.5304 kg/s, (b) 184.6°C, (c) 38.7 cm P = 300 kPa T, = 200°C Vi = 30 m/s A = 80 cm AIR...
Question 2 (30 marks) (a) A fluid flowing into a nozzle with specific enthalpy of 2980 kJ/kg and the velocity is 80 m/s. At the exit of the nozzle, the specific enthalpy of the fluid drops to 2670 kJ/kg. The nozzle orientation is horizontal and the heat loss is negligible. Given that the nozzle inlet area is 0.25 m2 and the specific volume of the fluid is 0.2 m2/kg, calculate the velocity of the fluid at exit, the mass flow...
Part I: Multiple Choice Problems 1. (3 points) A wave with displacement D(z.t) (12 cm) sin (2z -211), where z is in down a string composed of two segments: one with line and t is in seconds, travels density p-0.2 kg/m, and the other with p2 0.5 kg/m. What is the frequency (A to μ2? oscillations after the wave crosses the boundary from (a) 1.7 ㎐ (b) 2.9 Hz (c) 3.3 Ha (d) 110 Hz 2. (5 points) A siren...
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