With ever increasing technology, several methods of moving fluids and air in industrial systems are now available. Use of fans is among those methods. Axial fan refers to a specific model of compressor that raises the pressure in air that passes through it. It incorporates a shaft onto which blades attach. The blades are responsible for forcing air parallel travel 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 also made long and can assume different shapes. Others have different blade sections along the radius. The low number of blades makes velocity triangles and rotor geometry meaningless. These products are designed to perform best in environments with hot temperatures, usually within the range of 70 degrees Celsius. They come with different kinds of bearings to work in humid environments. The cheaper models incorporate sleeve bearings which do not last long.
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 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 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 also made long and can assume different shapes. Others have different blade sections along the radius. The low number of blades makes velocity triangles and rotor geometry meaningless. These products are designed to perform best in environments with hot temperatures, usually within the range of 70 degrees Celsius. They come with different kinds of bearings to work in humid environments. The cheaper models incorporate sleeve bearings which do not last long.
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 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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