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What is the use of a cross-flow fan?
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What is the use of a cross-flow fan?

Views: 0     Author: Site Editor     Publish Time: 2022-07-30      Origin: Site


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The cross-flow of a tangential fan, sometimes known as a tubular fan, was patented in 1893 by Paul Mortier and is used extensively in heating, ventilation, and air conditioning (HVAC), especially in ductless split air conditioners. The fan is usually long concerning the diameter, so the flow remains approximately two-dimensional away from the ends. The cross-flow fan uses an impeller with forward-curved blades, placed in a housing consisting of a rear wall and a vortex wall. Unlike radial machines, the main flow moves transversely across the impeller, passing the blading twice. What follows is a more detailed explanation of it and its functions. Below are some details about cross-flow fans and aluminum alloy cross flow fans.

Cross flow fanshave DC voltage series also have AC voltage series, such as 12V, 24V, 48V, 110V, 220V.

Here is the content list:

Cross Flow Fan

What is the operation principle of Cross Flow Fan?

A cross-flow fan is a centrifugal fan in which the air flows straight through the fan instead of at a right angle. The rotor of a cross-flow fan is covered to create a pressure differential. Cross- flow fans are made to have a double circular arc rear wall with a thick vortex wall that decreases in the radial gap. The gap decreases in the direction of the fan’s impeller rotation. The rear wall has a log-spiral profile while the vortex stabilizer is a horizontal thin wall with a rounded edge. The resultant pressure difference allows air to flow straight through the fan, even though the fan blades counter the flow of air on one side of the rotation. Cross-flow fans give airflow along the entire width of the fan; however, they are noisier than ordinary centrifugal fans, presumably, because the fan blades fight the flow of air on one side of the rotation, unlike typical centrifugal fans.

What several regions can a cross-flow fan can be divided into?

The flow within a cross-flow fan may be broken up into three distinct regions: a vortex region near the fan discharge, called an eccentric vortex, the through-flow region, and a paddling region directly opposite. Both the vortex and paddling regions are dissipative, and as a result, only a portion of the impeller imparts usable work on the flow. The cross-flow fan, or transverse fan, is thus a two-stage partial admission machine. The popularity of the cross-flow fan in HVAC comes from its compactness, shape, quiet operation, and ability to provide a high-pressure coefficient. Effectively a rectangular fan in terms of inlet and outlet geometry, the diameter readily scales to fit the available space, and the length is adjustable to meet flow rate requirements for the particular application. And on that basis, the aluminum alloy cross-flow fan has a greater hardness, So it's more secure.

What machines can cross flow fans be used on?

Common household tower fans are cross-flow fans. Much of the early work focused on developing the crossflow fan for both high- and low-flow-rate conditions and resulted in numerous patents. The result is that in certain positions the blades act as compressors (pressure increase), while at other azimuthal locations the blades act as turbines (pressure decrease).

Since the flow both enters and exits the impeller radially, the cross-flow fan is well suited for aircraft applications. Due to the two-dimensional nature of the flow, the fan readily integrates into a wing for use in both thrust production and boundary-layer control. A configuration that utilizes a crossflow fan is located at the wing leading edge is the fan wing. This design creates lift by deflecting the wake downward due to the rotational direction of the fan, causing a large Magnus force, similar to a spinning leading-edge cylinder. Another configuration utilizing a crossflow fan for thrust and flow control is the propulsive wing. In this design, the cross-flow fan is placed near the trailing edge of a thick wing and draws the air of the wing's suction (top) surface. By doing this, the propulsive wing is nearly stall-free, even at extremely high angles of attack, producing a very high lift. The external links section provides links to these concepts. Aluminum alloy cross-flow fan will be used on machines that require more security or more general requirements.

According to the principle of the cross-flow fans, people have made many convenient machines for people's life. It is widely used in all kinds of machines, even airplanes cannot be built without cross-flow fans. If you are in a cross-low fan business, you can consider our cost-effective products.

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