Problem 9.074 si air enters the diffuser of a turbojet engine at 18 kpa, 216 k, with a volumetric flow rate of 230 m3/s and a velocity of 265 m/s. the compressor pressure ratio is 13, and its isentropic efficiency is 87%. air enters the turbine at 1560 k and the same pressure as at the exit of the compressor. the turbine isentropic efficiency is 89%, and the nozzle isentropic efficiency is 97%. the pressure at the nozzle exit is 18 kpa. use an air-standard analysis. collapse question part step 1 determine the rate of heat input to the combustor, in mw.

On a average work day more than work place firs are reorted

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.