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2. Ducted fan - Wikipedia

   en.wikipedia.org/wiki/Ducted_fan

   In aeronautics, a ducted fan is a thrust-generating mechanical fan or propeller mounted within a cylindrical duct or shroud. Other terms include ducted propeller or shrouded propeller . [ 1 ] When used in vertical takeoff and landing ( VTOL ) applications it is also known as a shrouded rotor .

3. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   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).

4. Ducted propeller - Wikipedia

   en.wikipedia.org/wiki/Ducted_propeller

   The Kort nozzle is a shrouded propeller assembly for marine propulsion. The cross-section of the shroud has the form of a foil, and the shroud can offer hydrodynamic advantages over bare propellers, under certain conditions. Advantages are increased efficiency at lower speeds (<10 knots), better course stability and less vulnerability to debris.

5. Components of jet engines - Wikipedia

   en.wikipedia.org/wiki/Components_of_jet_engines

   Compressor or fan — The compressor is made up of stages. Each stage consists of rotating blades and stationary stators or vanes. As the air moves through the compressor, its pressure and temperature increase. The power to drive the compressor comes from the turbine (see below), as shaft torque and speed.

6. Shroud - Wikipedia

   en.wikipedia.org/wiki/Shroud

   Shroud usually refers to an item, such as a cloth, that covers or protects some other object. The term is most often used in reference to burial sheets , mound shroud , grave clothes , winding-cloths or winding-sheets , such as the Jewish tachrichim or Muslim kaffan , that the body is wrapped in for burial.

7. This profession hides some of the most prolific sex offenders ...

   www.aol.com/news/2016-07-07-this-profession...

   Sexual abuse by doctors against patients is surprisingly widespread, yet the fragmented medical oversight system shrouds offenders' actions in secrecy, allowing many to continue to treat patients ...