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zaroori
- 6
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hi can anybody explain for me why some fans blow the air and some suck the air?.I know it depends on the form of its wing, but how?
Its simply a matter of angle of attack and forward speed that ends up deflecting the air. You can take a flat board, angle it a bit upwards relative to it's velocity, and it will deflect the air downwards. The bottom surface of the board simply deflects the air downwards. As the upper surface of the board moves through the air, its downwards movment relative to the air causes the air to follow what would otherwise become a void (vacuum). Wiki's wording on this:zaroori said:how blades are designed to produce different pressure in each side
The shape of a fan's wing, also known as the blade or propeller, plays a crucial role in determining the direction and strength of the air flow it generates. The shape of the wing affects the amount of air that can be moved, the pressure difference between the front and back of the fan, and the direction of the air flow.
There are two main types of fan wings: axial and centrifugal. Axial fan wings have long, narrow blades that rotate around a central hub, while centrifugal fan wings have curved blades that rotate around a central axis. Axial fan wings are better for producing high volumes of air flow, while centrifugal fan wings are better for generating high pressure and directing air flow in a specific direction.
The angle, or pitch, of a fan's wing also plays a significant role in determining the air flow it produces. A steeper angle will produce higher pressure and slower air flow, while a shallower angle will produce lower pressure and faster air flow. This is because a steeper angle creates a larger difference in air pressure between the front and back of the fan, while a shallower angle allows air to pass through more easily.
Yes, the shape of a fan's wing can be modified to alter the air flow it produces. For example, changing the angle of the wing or adding winglets can increase or decrease pressure and air flow. However, this should only be done by trained professionals as altering the wing shape can also affect the balance and efficiency of the fan.
The size of a fan's wing is directly related to the amount of air that can be moved. A larger wing will move more air, while a smaller wing will move less air. However, other factors such as the shape, angle, and speed of the fan's wing also play a role in determining the air flow. In general, larger fan wings are better for moving air over a larger area, while smaller fan wings are better for focused air flow in a specific direction.