With increased technology, there are now several ways of moving air and fluids in industrial systems. The use of fans is one of the major ways used to achieve that. Axial fan is a specific type of compressor meant to raise the pressure of air going through it. It has blades that attach to a shaft. The blades force the air to move parallel to the shaft.
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.
The devices find application in several industries including cement, mining, chemical, woodworking, ceramic, and steel. Common industrial applications include heat recovery, dust removal and collection, building ventilation, combustion air, and fume removal. Also these propellers find use in ships, helicopters, hovercrafts, cooling towers, wind tunnels, and hydrofoils. If applied in propulsion, the major parameter of concern is the efficiency. If used as a fan however, parameters of importance are flow rate, pressure rise, efficiency, and power consumption.
These products are also in common use in computer systems as key cooling components. Those that are used in computer systems are installed with ball or fluid bearings to achieve consistent operation and maximum durability. Models used in computing devices are very costly but also very efficient at power consumption and operation. Normally the shaft is placed in line with the component to be cooled to blow air on it or draw air past it.
The relationship between volume flow rate and pressure variation is a major parameter of consideration during the manufacture process. As volume flow rate rises from the zero mark upwards, the efficiency also rises until up to a certain point where it begins to decrease. Pressure and power output are also varied with increase in performance.
These appliances have varied shapes and sizes. They can also be custom-built to suit specific applications. The cost differs according to power dissipation, quality, size, and material used in construction among many 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.
The devices find application in several industries including cement, mining, chemical, woodworking, ceramic, and steel. Common industrial applications include heat recovery, dust removal and collection, building ventilation, combustion air, and fume removal. Also these propellers find use in ships, helicopters, hovercrafts, cooling towers, wind tunnels, and hydrofoils. If applied in propulsion, the major parameter of concern is the efficiency. If used as a fan however, parameters of importance are flow rate, pressure rise, efficiency, and power consumption.
These products are also in common use in computer systems as key cooling components. Those that are used in computer systems are installed with ball or fluid bearings to achieve consistent operation and maximum durability. Models used in computing devices are very costly but also very efficient at power consumption and operation. Normally the shaft is placed in line with the component to be cooled to blow air on it or draw air past it.
The relationship between volume flow rate and pressure variation is a major parameter of consideration during the manufacture process. As volume flow rate rises from the zero mark upwards, the efficiency also rises until up to a certain point where it begins to decrease. Pressure and power output are also varied with increase in performance.
These appliances have varied shapes and sizes. They can also be custom-built to suit specific applications. The cost differs according to power dissipation, quality, size, and material used in construction among many other factors.
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