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.
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.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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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.
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