What is the Difference Between Propeller and Impeller?

The main difference between a propeller and an impeller lies in their functions and the way they move fluids. Here are the key differences:

• Function: A propeller is used to move a vehicle through a fluid, such as a boat through water, while an impeller is used to pull water into an engine to help cool it.
• Motion: Propellers push fluids, creating propulsion, whereas impellers pull fluids into the engine.
• Pressure: Impellers create pressure to move fluids, whereas propellers rely on water propulsion.

Both propellers and impellers use rotational energy to move fluids, and they are both powered by an external motor. Additionally, Bernoulli's principle, which relates fluid pressure to its speed, applies to the operation of both propellers and impellers. However, the shapes and orientations of their blades differ based on the specific requirements of their respective applications.

Comparative Table: Propeller vs Impeller

Here is a table summarizing the differences between propellers and impellers:

In summary, propellers are designed to convert rotational motion into forward thrust, pushing fluid away and producing water propulsion. They are typically found on the outside of vehicles like boats and planes. Impellers, on the other hand, are designed to use rotational motion to suck fluid in, increasing its pressure and flow. They are usually found inside a vehicle or engine, typically within a pump, and move fluid forward.