AEROFOIL MODULE FOR PROPELLER AND TURBINE BLADES WITH PASSIVE VARIABLE AIR PASSAGE COVER

An aerofoil module for use in a blade of a propeller or turbine comprising: a body comprising a suction surface and a pressure surface; an air passage traversing the body, the air passage having an entrance opening on the pressure surface and an exit opening on the suction surface; a cover for cover...

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Bibliographische Detailangaben
Hauptverfasser:	Akhter, Md. Zishan, Omar, Farag Khalifa
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER WEAPONS WIND MOTORS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	An aerofoil module for use in a blade of a propeller or turbine comprising: a body comprising a suction surface and a pressure surface; an air passage traversing the body, the air passage having an entrance opening on the pressure surface and an exit opening on the suction surface; a cover for covering a variable portion of a cross-section of the air passage; and a mechanism for varying the portion of the cross-section of the air passage covered by the cover, wherein the mechanism reacts passively to the oncoming air speed of oncoming air in the axial direction of the propeller/turbine; wherein the mechanism varies the portion of the cross-section covered by the cover such that the cover covers a smaller portion of the cross-section in response to a higher oncoming air speed, and covers a larger portion of the cross-section of the air passage in response to a lower oncoming air speed.