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 name originates from the fact that they blow air along the axis linearly. The working of this product and that of centrifugal fans is similar with the difference being in the mechanism. They use the propeller to draw air from outside and discharge it in the same axial direction. All air movements in this device are done by the propeller which achieves this through creation of pressure difference.
The total number of blades and the design in each blade are the major parameters to consider when making a purchase. Blades can be manufactured from different materials like wood, alloys, and aluminium. The number of blades is normally small ranging from 2 to 6 compared to the high number in ducted fans. Blade number is normally low to stop them from limiting the high flow rate at which the blades 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 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 name originates from the fact that they blow air along the axis linearly. The working of this product and that of centrifugal fans is similar with the difference being in the mechanism. They use the propeller to draw air from outside and discharge it in the same axial direction. All air movements in this device are done by the propeller which achieves this through creation of pressure difference.
The total number of blades and the design in each blade are the major parameters to consider when making a purchase. Blades can be manufactured from different materials like wood, alloys, and aluminium. The number of blades is normally small ranging from 2 to 6 compared to the high number in ducted fans. Blade number is normally low to stop them from limiting the high flow rate at which the blades 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 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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This article collected, selected and written by: Author Van Hoc
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