Momentum Theory, also known as Actuator Disk Theory, is a fundamental principle in fluid dynamics used to predict the performance of devices like propellers and wind turbines by modeling the flow of air or fluid through a rotor. It simplifies the complex interaction between a device and the air or fluid by treating the rotor as a disk that changes the momentum of the flow passing through it, allowing for analysis of thrust or power generated.

Momentum Theory

Actuator Disk Theory

Fluid dynamics is a branch of physics that studies the behavior of fluids (liquids and gases) in motion and the forces acting on them. It is essential for understanding natural phenomena and designing systems in engineering disciplines, including aerodynamics, hydrodynamics, and meteorology.

Fluid Dynamics

Performance of devices

Propellers

Wind turbines are devices that convert kinetic energy from the wind into mechanical power, which can then be converted into electricity. They are a crucial component of renewable energy strategies aimed at reducing reliance on fossil fuels and mitigating climate change.

Wind Turbines

Flow of air

Flow of fluid

A rotor is a rotating component of a mechanical device, often found in electric motors, generators, turbines, and helicopters, that interacts with stators to convert energy between mechanical and electrical forms. Its design and function are critical for the efficiency and performance of the machinery in which it is used, influencing factors like torque, speed, and stability.

Rotor

Complex interaction

Thrust is a force that propels an object in a specific direction, often used in the context of engines and propulsion systems. It is generated by the expulsion of mass, as described by Newton's third law of motion, where every action has an equal and opposite reaction.

Concepts

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