Find Answer: How Does a Fan Work?

In summary, the conversation discussed the mechanics of a fan or propeller and how it creates a force through the rotation of air. The normal forces and vector involved were mentioned, as well as the comparison to a plane's wing. The twist in the fan's arm causes the air to change direction, creating a reaction and force on the device.
  • #1
aberrated
13
0
can anybody help me to find the answer of this question?

a fan ( or a propellor) rotates sidewise, but the air goes making a perpendicular with the axis of its motion.. I know that there is vector involved in this, but how does it work?
 
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  • #2
Normal forces are perpendicular to the surface, so whenever a fan wing hits a molecule, it accelerates it in the direction perpendicular to the plane of the wing.
 
  • #3
So there is a slight hellical rotation in the fan airstream which is generally ignored.

Ken
 
  • #4
The twist in the fan's "arm" make the air change direction when moving. This change of direction creates a reaction on the fan itself. This reaction acts as a force on the whole device.

If you want, the process is the same as for planes flying. The air passing under the wing of the plane is deviated downward, creating a force upward on the wing.
 

FAQ: Find Answer: How Does a Fan Work?

1. What are the main components of a fan?

The main components of a fan include the motor, blades, and housing. The motor is responsible for rotating the blades, and the housing helps to direct and circulate the air.

2. How does a fan produce air flow?

A fan produces air flow by using a motor to spin the blades, creating a low pressure area behind the blades. This low pressure area then pulls in air from the surrounding environment, resulting in a flow of air.

3. What is the difference between a ceiling fan and a desk fan?

The main difference between a ceiling fan and a desk fan is their size and placement. A ceiling fan is larger and mounted on the ceiling, while a desk fan is smaller and placed on a surface such as a desk or table. Additionally, a ceiling fan is typically used to cool an entire room, while a desk fan is used to cool a specific area or person.

4. How does a fan cool down a room?

A fan does not actually cool down a room, but rather creates a breeze that can make it feel cooler for those in the room. The movement of air from the fan can help to evaporate sweat, which can make a person feel cooler.

5. Can a fan be harmful to your health?

No, a fan is not harmful to your health. However, if a fan is used in a poorly ventilated room, it can circulate dust and other allergens, potentially causing discomfort for those with allergies. It is important to regularly clean and maintain fans to prevent the buildup of dust and allergens.

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