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 name of these appliances is named after their ability to blow air parallel to their axis. Their functioning is the same that of centrifugal fans with differences coming in the mechanisms. Propellers draw air from the surroundings and dissipate it along same axial path. Propellers are responsible for all movements in air that take place in the appliance. This is attained through creation of differences n pressure.
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 appliances are applied in many industries including ceramic, steel, cement, mining, chemical, and woodworking. Some common industrial applications include dust collection or removal, heat recovery, building ventilation, fume removal, and combustion air. Also the propellers are used in hovercrafts, hydrofoils, ships, helicopters, cooling towers, and wind tunnels. If used for propulsion purposes, the main parameter of interest is efficiency. However if it is acting as a fan, important parameters are flow rate, efficiency, power consumption, and pressure rise.
These products are used widely in computers as a major source of cooling. When used in computer cases, they come with fluid or ball bearings to ensure maximum durability and consistent operation. The models used in computers are very expensive but also highly efficient in terms of operation and power consumption. The shaft is normally aligned with the heat source to draw air past it or blow air on 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 of these appliances is named after their ability to blow air parallel to their axis. Their functioning is the same that of centrifugal fans with differences coming in the mechanisms. Propellers draw air from the surroundings and dissipate it along same axial path. Propellers are responsible for all movements in air that take place in the appliance. This is attained through creation of differences n pressure.
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 appliances are applied in many industries including ceramic, steel, cement, mining, chemical, and woodworking. Some common industrial applications include dust collection or removal, heat recovery, building ventilation, fume removal, and combustion air. Also the propellers are used in hovercrafts, hydrofoils, ships, helicopters, cooling towers, and wind tunnels. If used for propulsion purposes, the main parameter of interest is efficiency. However if it is acting as a fan, important parameters are flow rate, efficiency, power consumption, and pressure rise.
These products are used widely in computers as a major source of cooling. When used in computer cases, they come with fluid or ball bearings to ensure maximum durability and consistent operation. The models used in computers are very expensive but also highly efficient in terms of operation and power consumption. The shaft is normally aligned with the heat source to draw air past it or blow air on 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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