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1. Airflow enters a duct at a total pressure of 250 kPa and a total temperature...
Air at stagnation pressure of 700 kPa and temperature of 530 K enters a isentropic converging-diverging...
Air at stagnation pressure of 700 kPa and temperature of 530 K enters a isentropic converging-diverging nozzle. The throat area of the nozzle is 5 cm2, the exit area is 12.5 cm2. The back pressure is 350 kPa and a normal shock occurs within a diverging section. Determine (a) exit Mach number, (b) change in stagnation pressure, (c) upstream and downstream Mach number of shock (d) cross sectional area where shock occurs (e) back pressure if the flow were isentropic...
Air flows through a constant area duct. The pressure and temperature of the air at the...
Air flows through a constant area duct. The pressure and temperature of the air at the inlet to the duct are P1 = 100 kPa absolute, and T1 = 298 K, respectively. Inlet Mach number is M1 = 0.1. Heat is transferred to the air as it flows through the duct and as a result the Mach number at the exit increases. a) Find the pressure and temperature at the exit, while the exit Mach number changes between M=0.2 to...
Consider steady adiabatic airflow in a duct. At section B, the pressure is 660 kPa and...
Consider steady adiabatic airflow in a duct. At section B, the pressure is 660 kPa and the temperature is 177ºC. At section D, the density is 1.13 kg/m3 and the temperature is 156°C. Find the entropy change. Also, determine the way in which the air flow occurs. The change in entropy is ----- m2/S2.K.
3. Air enters a constant area duct at a Mach number of 0.14, a pressure of 195 kPa, and a temperature of 25 °C. Heat is added to the air that flows through the duct at a rate of 65 kJ/kg of air. A...
3. Air enters a constant area duct at a Mach number of 0.14, a pressure of 195 kPa, and a temperature of 25 °C. Heat is added to the air that flows through the duct at a rate of 65 kJ/kg of air. Assuming that the flow is steady and that the effects of wall friction can be ignored, find the temperature, pressure, and Mach number at which the air leaves the duct. Assume that the air behaves as a...
4. CO2 flows steadily through the duct shown from 350 kPa, 60°C, and 120 m/s at...
4. CO2 flows steadily through the duct shown from 350 kPa, 60°C, and 120 m/s at the inlet state to M -1.3 at the outlet, where local isentropic stagnation conditions are known to be 385 kPa and 350 K. Compute the local isentropic stagnation pressure and temperature at the inlet and the static pressure and temperature at the duct outlet. Flow Inlet Outlet
At steady state, air at 200 kPa, 325 K, and mass flow rate of 1.0 kg/s...
At steady state, air at 200 kPa, 325 K, and mass flow rate of 1.0 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. The inlet cross-sectional area is 6 cm2. At the duct exit, the pressure of the air is 100 kPa and the velocity is 300 m/s. Neglecting potential energy effects and modeling air as an ideal gas, determine a. the velocity of the air at the inlet, in m/s. b. the temperature of the...
Problem 4.018 SI Air enters a horizontal, constant-diameter heating duct operating at steady state at 300...
Problem 4.018 SI Air enters a horizontal, constant-diameter heating duct operating at steady state at 300 K, 1 bar, with a volumetric flow rate of 0.25 m3/s, and exits at 325 K, 0.95 bar. The flow area is 0.05 m2 Assuming the ideal gas model with k-1.4 for the air, determine: (a) the mass flow rate, in kg/s, (b) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer to the air, in...
a subsonic flow enters a 1-D duct that is frictionless. the inlet stagnation temperature is 250K....
a subsonic flow enters a 1-D duct that is frictionless. the inlet stagnation temperature is 250K. Heat is added at 350 kJ/kg. what is the maximum possible Mach No. at the inket of the duct?
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...
9. Air, assumed to be a perfect gas with γ-14, enters a converging frictionless channel with M 0....
9. Air, assumed to be a perfect gas with γ-14, enters a converging frictionless channel with M 0.2. The mass flow rate is 0.90 kg/s, and the static pressure is 1.40 105 N/m2. The exit area of the channel is 0090 m2 and the static pressure in the exit area is 1.00 105 N/m2. It is desired to increase the mass flow rate to 3.60 kg/s, maintaining the exit pressure at 100 105 N/m, without changing the temperature at the...
3. Air enters a constant area duct at a Mach number of 0.14, a pressure of 195 kPa, and a temperature of 25 °C. Heat is added to the air that flows through the duct at a rate of 65 kJ/kg of air. Assuming that the flow is steady and that the effects of wall friction can be ignored, find the temperature, pressure, and Mach number at which the air leaves the duct. Assume that the air behaves as a...
4. CO2 flows steadily through the duct shown from 350 kPa, 60°C, and 120 m/s at the inlet state to M -1.3 at the outlet, where local isentropic stagnation conditions are known to be 385 kPa and 350 K. Compute the local isentropic stagnation pressure and temperature at the inlet and the static pressure and temperature at the duct outlet. Flow Inlet Outlet
Problem 4.018 SI Air enters a horizontal, constant-diameter heating duct operating at steady state at 300 K, 1 bar, with a volumetric flow rate of 0.25 m3/s, and exits at 325 K, 0.95 bar. The flow area is 0.05 m2 Assuming the ideal gas model with k-1.4 for the air, determine: (a) the mass flow rate, in kg/s, (b) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer to the air, in...
9. Air, assumed to be a perfect gas with γ-14, enters a converging frictionless channel with M 0.2. The mass flow rate is 0.90 kg/s, and the static pressure is 1.40 105 N/m2. The exit area of the channel is 0090 m2 and the static pressure in the exit area is 1.00 105 N/m2. It is desired to increase the mass flow rate to 3.60 kg/s, maintaining the exit pressure at 100 105 N/m, without changing the temperature at the...
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