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FAQs on PPT: Flywheel - Theory of Machines (TOM) - Mechanical Engineering

1. What is a flywheel in mechanical engineering?
Ans. A flywheel is a mechanical device used to store rotational energy. It consists of a heavy wheel or disc that is mounted on an axis and can rotate freely. It is commonly used in machines or systems that require a smooth and continuous supply of energy, such as engines, turbines, and power generators.
2. How does a flywheel work in mechanical engineering?
Ans. A flywheel works by storing energy in its rotating mass. When a force is applied to the flywheel, it starts spinning and stores kinetic energy. This energy can be used later to deliver a continuous and smooth output, even when the input force fluctuates. The flywheel's inertia helps in maintaining constant rotational speed and absorbing energy variations.
3. What are the applications of flywheels in mechanical engineering?
Ans. Flywheels have several applications in mechanical engineering. They are commonly used in automotive engines to store energy during deceleration and release it during acceleration, improving fuel efficiency. Flywheels are also used in power storage systems, such as hybrid vehicles and grid energy storage. Additionally, they are employed in machinery that requires smooth energy transfer, such as reciprocating pumps and compressors.
4. How is the energy stored in a flywheel calculated?
Ans. The energy stored in a flywheel can be calculated using the formula: E = 0.5 * I * ω^2, where E is the energy stored, I is the moment of inertia of the flywheel, and ω is the angular velocity of the flywheel in radians per second. This formula quantifies the rotational kinetic energy stored in the flywheel.
5. What are the advantages of using a flywheel in mechanical systems?
Ans. Using a flywheel in mechanical systems offers several advantages. Firstly, it provides energy storage, allowing for a smooth and continuous power output. Secondly, it helps in reducing energy fluctuations and improving the overall efficiency of the system. Additionally, flywheels can act as a stabilizing force, minimizing speed variations and vibrations. Lastly, they provide a reliable backup power source in case of a temporary power loss.
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