An Otto cycle engine that has a turning moment diagram shown in Figure 2 develops 50 kW at 150 rpm with 75 explosions per minute. The change of speed from the commencement to the end of power stroke must not exceed 0,5 percent of mean on either side. The density of rim material is 7200 kg/m³. Assume that the flywheel stores 16/15 times the energy stored by the rim and the work done during power stroke is 1,40 times the work done during the cycle. Calculate the mean diameter of the flywheel having width four times the depth so that the hoop stress does not exceed 4 MPa.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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An Otto cycle engine that has a turning moment diagram shown in Figure 2 develops 50 kW at 150 rpm with 75 explosions per minute. The change of speed from the commencement to the end of power stroke must not exceed 0,5 percent of mean on either side. The density of rim material is 7200 kg/m³. Assume that the flywheel stores 16/15 times the energy stored by the rim and the work done during power stroke is 1,40 times the work done during the cycle. Calculate the mean diameter of the flywheel having width four times the depth so that the hoop stress does not exceed 4 MPa.
mex
-AE
Te an
2
37
Compression <- Power of ATxhaus>
working
Crank engle
AISuclion -
Figure 2 Turning moment diagram
Turning moment
Transcribed Image Text:mex -AE Te an 2 37 Compression <- Power of ATxhaus> working Crank engle AISuclion - Figure 2 Turning moment diagram Turning moment
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