With the ever increasing technology, companies have had to find ways of moving air and fluids around. One of those ways is by using fans. A specific kind of fan called the axial fan is a type of compressor designed to increase pressure of air passing through it. The air is forced by the blades to move in a parallel direction to the shaft from which the blades originate.
The ability of these devices to blow air along the axis is the origin of their name. They work in the same way as centrifugal fans with the difference lying in the mechanism. The propeller draws air from outside and discharges it along the same axial direction. The propeller is responsible for all air movements that occur in this device. The propeller attains this through creation of pressure difference.
The major components that requires paying attention to are the number of blades and the design of each blade. The blades can be made from many different materials such as aluminium, wood, and various alloys. The blades are normally fewer ranging from 2 to 6 as compared to ducted fans which may have very many. The number of blades is limited so as to prevent them from restricting the high flow rate at which they operate.
The blades are made in different shapes and lengths. Others feature various blade sections along radii. The necessity of rotor geometry and velocity triangles is eliminated by the low number of blades. The design of these products is meant to work best in places with high temperatures, usually in the range of seventy degrees centigrade. They can also work in humid environments depending on the kind of bearings they come with. Cheaper models have sleeve bearings which have short life spans.
These gadgets find use in many industries including chemical, woodworking, ceramic, steel, cement, and mining. Common industrial applications are building ventilation, dust removal and collection, combustion air, fume removal, and heat recovery. Propellers also find application in cooling towers, ships, helicopters, wind tunnels, hydrofoils, and hovercrafts. When they are applied for propulsion, the efficiency is the major parameter considered. Flow rate, efficiency, power consumption, and pressure rise are however all of importance if the device is used as a fan.
These devices are also widely used inside computers as cooling elements. They incorporate fluid or ball bearings to ensure consistency in operation and maximum life when they are used for cooling in computers. Models installed in computers devices are costly but function and consume power efficiently. Normally shafts are installed to be in line with the part that needs to be cooled. The device blows air towards the part or draws air past it.
The relationship between pressure variation and volume flow rate is normally of great concern during the manufacture process. As the flow rate goes up from zero mark, efficiency rises to up to a given point before it begins to deteriorate. Power output and pressure are also vary diversely with the rise in performance.
These devices come in difference sizes and shapes. They are also customized according to the function for which they are meant. The costs differ with power dissipation, size, quality, and material used for construction among other factors.
The ability of these devices to blow air along the axis is the origin of their name. They work in the same way as centrifugal fans with the difference lying in the mechanism. The propeller draws air from outside and discharges it along the same axial direction. The propeller is responsible for all air movements that occur in this device. The propeller attains this through creation of pressure difference.
The major components that requires paying attention to are the number of blades and the design of each blade. The blades can be made from many different materials such as aluminium, wood, and various alloys. The blades are normally fewer ranging from 2 to 6 as compared to ducted fans which may have very many. The number of blades is limited so as to prevent them from restricting the high flow rate at which they operate.
The blades are made in different shapes and lengths. Others feature various blade sections along radii. The necessity of rotor geometry and velocity triangles is eliminated by the low number of blades. The design of these products is meant to work best in places with high temperatures, usually in the range of seventy degrees centigrade. They can also work in humid environments depending on the kind of bearings they come with. Cheaper models have sleeve bearings which have short life spans.
These gadgets find use in many industries including chemical, woodworking, ceramic, steel, cement, and mining. Common industrial applications are building ventilation, dust removal and collection, combustion air, fume removal, and heat recovery. Propellers also find application in cooling towers, ships, helicopters, wind tunnels, hydrofoils, and hovercrafts. When they are applied for propulsion, the efficiency is the major parameter considered. Flow rate, efficiency, power consumption, and pressure rise are however all of importance if the device is used as a fan.
These devices are also widely used inside computers as cooling elements. They incorporate fluid or ball bearings to ensure consistency in operation and maximum life when they are used for cooling in computers. Models installed in computers devices are costly but function and consume power efficiently. Normally shafts are installed to be in line with the part that needs to be cooled. The device blows air towards the part or draws air past it.
The relationship between pressure variation and volume flow rate is normally of great concern during the manufacture process. As the flow rate goes up from zero mark, efficiency rises to up to a given point before it begins to deteriorate. Power output and pressure are also vary diversely with the rise in performance.
These devices come in difference sizes and shapes. They are also customized according to the function for which they are meant. The costs differ with power dissipation, size, quality, and material used for construction among other factors.
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