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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 rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing ...
A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel).
Multistage centrifugal extractor cross section drawing The feed solution initially containing one or more solutes (heavy phase on the cross section drawing Fig 3.), and an immiscible solvent having a different density (light phase on cross section sketches) flow counter-currently through the extractor’s rotor, designed with a stack of ...
The Japanese war fan, or tessen (Japanese: 鉄扇,てっせん, romanized: tessen, lit. '"iron fan"'), is a Japanese hand fan used as a weapon or for signalling. Several types of war fans were used by the samurai class of feudal Japan and each had a different look and purpose.
The figure shows one such ideal expansion fan. A supersonic expansion fan, technically known as Prandtl–Meyer expansion fan, a two-dimensional simple wave, is a centered expansion process that occurs when a supersonic flow turns around a convex corner. The fan consists of an infinite number of Mach waves, diverging from a sharp corner. When a ...
The PSS was developed to give Soviet special forces and secret police an almost completely silent option for covert operations such as reconnaissance and assassinations. The weapon uses a special cartridge with an internal piston to achieve this goal. Otherwise, it is a fairly simple double-action pistol. Few details are known about the pistol ...
A married couple, Bob and Millie Frazier, wake up in an unfamiliar house. Millie remembers only that Bob drank too much at a party the night before, and that while driving him home to Manhattan, a large shadow appeared over their car near Riverdale.
Knight sleeve valve engine Emblem on Stearns car powered by Knight engine. The Knight engine is an internal combustion engine, designed by American Charles Yale Knight (1868-1940), that uses sleeve valves instead of the more common poppet valve construction.