Engineering, 18.11.2020 08:20 paytum314
Air enters the diffuser of a turbojet engine with a mass flow rate of 39 kg/s at
62 kPa, 233 K, and a velocity of 225 m/s. The pressure ratio for the
compressor is 12, and its isentropic efficiency is 88%. Air enters the turbine at
1333 K with the same pressure as at the exit of the compressor. Air exits the
nozzle and turbine have isentropic efficiencies of 92% and 90%, respectively.
On the basis of an air-standard analysis, calculate
(a) the rate of heat addition, in kJ/h.
(b) the pressure at the turbine exit, in kPa.
(c) the compressor power input, in kJ/h.
(d) the velocity at the nozzle exit, in m/s.
(e) the thrust provided by the engine.
Answers: 2
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When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point
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During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false
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Engineering, 04.07.2019 19:20
At steady state, air at 200 kpa, 325 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 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2
Answers: 2
Air enters the diffuser of a turbojet engine with a mass flow rate of 39 kg/s at
62 kPa, 233 K, and...
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