A Fourier analysis is carried out on the crank effort diagram for an engine and it is determined that the output torque can be represented by T = 4500 + 6000 sin(theta) + 1400 sin2(theta)+ 200 sin 3(theta) Nm, where theta is the crank angle, The resisting torque is uniform and the engine speed is 150 rev/min. (a) Sketch the turning moment curve for 1 revolution of the engine shaft. (b) Calculate the brake power of the engine. (c) Determine the greatest fluctuation of energy per cycle. (d) Determine the moment of inertia of the flywheel required to restrict speed fluctuation to + 0.5%. (e) Determine the angular acceleration of the flywheel when theta = 40

Question

A Fourier analysis is carried out on the crank effort diagram for an engine and it is determined that the output torque can be represented by T = 4500 + 6000 sin(theta) + 1400 sin2(theta)+ 200 sin 3(theta) Nm, where theta is the crank angle, The resisting torque is uniform and the engine speed is 150 rev/min.  (a) Sketch the turning moment curve for 1 revolution of the engine shaft. (b) Calculate the brake power of the engine.  (c) Determine the greatest fluctuation of energy per cycle. (d) Determine the moment of inertia of the flywheel required to restrict speed fluctuation to + 0.5%. (e) Determine the angular acceleration of the flywheel when theta = 40