Helium at 200 kPa, 227 C is expanded in steady flow through a nozzle to 100...

Helium at 200 kPa, 227 C is expanded in steady flow through a nozzle to 100 kPa. At these operating conditions the nozzle efficiency is 76%.

a) Making the usual nozzle assumptions, calculate the actual velocity at the nozzle exit. Start with the appropriate form of the first law.

b) Calculate the actual nozzle exit temperature.

Solutions

Expert Solution

samet mamat answered 1 year ago

Next > < Previous

Related Solutions

Air passes through a jet engine nozzle operating at steady state. The flow at the nozzle...

Air passes through a jet engine nozzle operating at steady state. The flow at the nozzle inlet has a temperature of 900° F. The nozzle inlet has an area of 5 ft2. The flow at the nozzle outlet has a temperature of 875° F, a specific volume of 90 ft3/lb, and a velocity of 600 ft/s. The nozzle outlet has an area of 2 ft2. Model the air as an ideal gas with constant specific heats. Evaluate the specific heats...

An air compressor operating in adiabatic steady flow takes in air at 17 C, 200 kPa...

An air compressor operating in adiabatic steady flow takes in air at 17 C, 200 kPa and discharges is at 1300 kPa. Calculate the minimum work required to drive the compressor assuming the compressor has i) constant specific heats. ii) non-constant specific heats.

At steady state, air at 200 kPa, 330 K, and mass flow rate of 0.5 kg/s...

At steady state, air at 200 kPa, 330 K, and mass flow rate of 0.5 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 250 m/s. Neglecting potential energy effects and modeling air as an ideal gas with constant cp = 1.008 kJ/kg · K, determine: (a) the velocity of the air at the...

Water vapor goes into a diffuser at steady state, with inlet conditions of 800 kPa, 200°C...

Water vapor goes into a diffuser at steady state, with inlet conditions of 800 kPa, 200°C and velocity of 400 m/s. Superheated steam leaves the outlet at 2 MPa and velocity of 2 100 m/s. The inlet area of the diffuser is 14 cm . The system loses heat at the rate of 25 kJ/s to the surroundings. Neglect changes in potential energy between the inlet and outlet. What is the mass flow rate of the water vapor, in kg/s?...

1. Air enters a steady-state diffuser at T1 = 20 °C, P1 = 100 kPa and...

1. Air enters a steady-state diffuser at T1 = 20 °C, P1 = 100 kPa and leaves at P2 = 105 kPa. You may assume an adiabatic diffuser and constant specific heats. Find T2 if: a) V1 = 10 m/s, V2 = 0 m/s b) V1 = 100 m/s, V2 = 90 m/s c) V1 = 500 m/s, V2 = 490 m/s d) V1 = 1000 m/s, V2 = 990 m/s

A nozzle is is designed to achieve M=4 under expanded exit flow conditions. For the given...

A nozzle is is designed to achieve M=4 under expanded exit flow conditions. For the given total pressure and total temperature, calcuate: a) exit Mach b)mach at which normal shock occurs in the model

Air is supplied to a convergent–divergent nozzle from a reservoir where the pressure is 100 kPa....

Air is supplied to a convergent–divergent nozzle from a reservoir where the pressure is 100 kPa. The air is then discharged through a short pipe into another reservoir where the pressure can be varied. The cross-sectional area of the pipe is twice the area of the throat of the nozzle. Friction and heat transfer may be neglected throughout the flow. If the discharge pipe has constant cross-sectional area, determine the range of static pressure in the pipe for which a...

1. If an ideal solution of the flow field through a nozzle is shown with a...

1. If an ideal solution of the flow field through a nozzle is shown with a depiction of vectors distributed at points throughout the nozzle that illustrate the magnitude and direction of steady flow through those points, this depiction would be Eulerian or Lagrangian (circle one) 2. If an ideal solution of the flow field through a nozzle is shown with a depiction of vectors attached to particles moving through the nozzle, changing magnitude and direction as they move through...

Consider the steady, incompressible blood flow through the following vascular network: 100 µm diameter which is...

Consider the steady, incompressible blood flow through the following vascular network: 100 µm diameter which is 80 mm in length to the first branching point, which can be estimated as a standard tee (flow through run), the branch off the tee turns 45 degrees and undergoes a constriction to 65 µm diameter and the flow through run continues for another 80 mm. The velocity of the blood into the 100 µm diameter vessel is 100 mm/s and 20% of the...

Air at 5 bar and 560K is expanded in steady flow in a horizontal convergent–divergent duct...

Air at 5 bar and 560K is expanded in steady flow in a horizontal convergent–divergent duct to an exit velocity of 640 ms−1. The walls of the duct are heated so as to keep the temperature drop to one-half the value of an isentropic expansion to the same velocity and pressure from the same initial conditions. Calculate, assuming negligible initial velocity: a. the heat supplied; b. the final temperature; c. the mass flow rate per square metre of exit area.

Subjects