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Air enters the diffuser of a turbojet engine in flight at 0.82 bar, 230 K, with a mass flow rate of 68 kg/s and a velocity of 245 m/s. The compressor pressure ratio is 10. Air enters the turbine at 1250 K with the same pressure as at the exit of the compressor. Air exits the nozzle at 0.82 bar. The nozzle and the diffuser operate adiabatically and with no internal irreversibilities. The compressor and turbine operate adiabatically. The compressor has an isentropic efficiency of 87%, and the turbine has an isentropic efficiency of 90%. Potential energy effects can be neglected as can kinetic energy effects internal to the engine. On the basis of air-standard analysis, determine
(a) the rate of heat addition, in kW.
(b) the pressure at the turbine exit, in bar.
(c) the compressor power input, in kW.
(d) the velocity at the nozzle exit, in m/s.4-2. Determine the thrust, kN, for the turbojet engine of Problem 4-1.
The company has been asked to assess the effects of a variety of engineering conditions on a selection of components, perform calculations for the components that follow. A medium carbon annealed steel rod has a rectangular cross section and must cop..
Air in piston/cylinder at 200 kPa, 600K is expanded in a constant-pressure process to twice the initial volume (state 2). At this point, the piston is locked with a pin and heat is transferred to a final temperature of 600K. Find the work and heat..
Find the input/output equation using the P-operator approach when x2 is the output.
consider an aircraft powered by a turbojet engine that has a pressure ratio of 9. the aircraft is stationary on the
What's wrong with this passage? In this section, you'll proof-read a passage looking for grammar, punctuation, and spelling errors. It may help to read the passage aloud, to more easily determine any mistakes. You don't need to tell us how many co..
steam at 10 mpa and 450 degrees c enters an adiabatic turbine at 80 ms and exits at 10 kpa 92 quality and 50 ms. the
Show that the specific heat at saturation of a liquid phase of mass m (defined by Cf= (deltaQ/m)dt is generally not the same as the specific heat at constant pressure of the saturated liquid.
Consider a one-dimensional plane wall at a uniform initial temperature Ti. The wall is 10 mm thick, and has a thermal diffusivity of 6 x 10^-7 m2/s. The left face is insulated, and suddenly the right face is lowered to a temperature Ts,r.
What is the maximum shear stress on the transverse section 1 m from the ground?
Your friend has a new job as mechanical engineer helping design bridges. He designs his main support beam to support for a cross sectional area of 100 inA2, made from a Al-4% Cu alloy, treated to produce the highest strength. During production, a ..
Determine the Axial force (due to weight),Torque (due to maximum wind pressure) acting on the pole, Contraction in the pole,Angle of twist in the pole etc .
The plates generate a uniform electric field E0 j in the region 0 ≤ x ≤ b and no field elsewhere.∗- Find the angle through which the particle is deflected by its passage between the plates.
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