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A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air.
The IAE V2500SF SuperFan was a design study for a high-bypass geared turbofan derived from the IAE V2500.It was offered as the primary engine option for the Airbus A340-200 and 300 in January 1987.
Full-tower computer cases may contain multiple cooling fans. At the top of the case is a fan controller. Fan control is the management of the rotational speed of an electric fan.
An axial fan is a type of fan that causes gas to flow through it in an axial direction, parallel to the shaft about which the blades rotate. The flow is axial at entry and exit.
Six 80 mm fans, commonplace components in earlier personal computers (either as a pair or mixed with fans of other sizes) A 30-millimetre (1.2 in) PC fan in a square black plastic chassis lying on the hub of a circular one of translucent plastic sized 250 mm (9.8 in)
Propulsive efficiency comparison for various gas turbine engine configurations. In the 1970s, Hamilton Standard described its propfan as "a small diameter, highly loaded multiple bladed variable pitch propulsor having swept blades with thin advanced airfoil sections, integrated with a nacelle contoured to retard the airflow through the blades thereby reducing compressibility losses and ...
Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.
Specific Fan Power (SFP) is a parameter that quantifies the energy-efficiency of fan air movement systems.It is a measure of the electric power that is needed to drive a fan (or collection of fans), relative to the amount of air that is circulated through the fan(s).