Study of a Fan Using the Weis-Fogh Mechanism. (An Experimental Fan and Its Characteristics).

Abstract

A fan using the Weis-Fogh mechanism was built and its characteristics were studied. Two wings were set to move out-of-phase by an arm which rotates changing its directions in a square channel. Characteristics for two types of arms and wings were investigated. The best performance was achieved with a combination of an elastic arm and elastic wings which elastically deform. The Weis-Fogh mechanism is shown to be applicable to fans as well as pumps or propulsion equipment for ships. However, further investigations are required for diminishing the noise and vibration.