It is a circular heavy wheel,generally,fitted to a rotating engine shaft to control variation in its speed during each cycle. Strictly speaking,it serves as a reservoir to store and restore energy by virtue of its inertia.Or in other words,it shears its energy during the period,when the supply of energy is more than the requirement; and releases it during the period when the supply of energy is less than the requirement.
It will be interesting to know that in all types of steam engines and I.C. engines,the power generated and supplied to the shaft is variable.As a matter of fact,the flywheel speed increases when it absorbs energy and decreases when it releases energy.Thus a flywheel is designed to keep the engine speed within the prescribed limits during each cycle.
The difference between the maximum and minimum speeds of an engine during a cycle is called the function of speeds.And the ratio of fluctuation of speed,to the mean engine speed,is called coefficient of fluctuation of speed.
Let M=Mass of the flywheel,
I=Mass moment of Inertia of the flywheel,
It will be interesting to know that in all types of steam engines and I.C. engines,the power generated and supplied to the shaft is variable.As a matter of fact,the flywheel speed increases when it absorbs energy and decreases when it releases energy.Thus a flywheel is designed to keep the engine speed within the prescribed limits during each cycle.
The difference between the maximum and minimum speeds of an engine during a cycle is called the function of speeds.And the ratio of fluctuation of speed,to the mean engine speed,is called coefficient of fluctuation of speed.
Let M=Mass of the flywheel,
I=Mass moment of Inertia of the flywheel,
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| Picture of Flywheel |
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