Underwater cylindrical bluff body Karman vortex street power generation device

Abstract

The invention provides an underwater cylindrical bluff body Karman vortex street power generation device which comprises a cylindrical bluff body, an annular rack, an upper rotating ring, a lower rotating ring, an upper connecting plate, a lower connecting plate, a limiting stopper, a wake flow plate, a rotating body, a rack, a power generator and a shaft seal. When an ocean current flows through the bluff body, the ocean current generates vortexes which fall off alternately on the two sides of the bluff body, and the shedding vortexes on the two sides interact with each other to form Karman vortex street periodic alternating transverse force. According to the underwater cylindrical bluff body Karman vortex street power generation device, a three-stage vortex shedding energy recovery device is arranged in a vortex shedding formation area, so that the purpose of recovering vortex shedding energy step by step is achieved, the vortex shedding energy is fully utilized before the vortex shedding strength is obviously weakened, and the recovery efficiency of ocean current energy is improved. In addition, the underwater cylindrical bluff body Karman vortex street power generation device can adapt to the ocean current direction through the wake flow plate for position adjustment, so that energy of vortex shedding transverse force is captured in all directions, and the ocean current energy utilization rate of the underwater cylindrical bluff body Karman vortex street power generation device is further improved.

Description

technical field [0001] The invention belongs to the technical field of underwater power generation, and in particular relates to a Karman vortex street power generation device of an underwater cylindrical bluff body. Background technique [0002] As an important phenomenon in fluid mechanics, Karman vortex street is often encountered in nature. It refers to: when a steady incoming flow bypasses some objects under certain conditions, both sides of the object will periodically fall off and rotate in the opposite direction. , Dicolumn vortices arranged regularly form Karman vortex street after nonlinear action. For example, water flowing through bridge piers and columns, and wind blowing through high towers, chimneys, wires, etc. will form Karman vortex street. In addition, when the Karman vortex street appears, the fluid will alternately shed vortices on both sides behind the object, that is, a periodic alternating lateral force will appear. If the natural frequency of the ob...

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Problems solved by technology

Therefore, the method of installing the recovery device at the place where the above-mentioned patent is attached to the bridge pier has low recovery efficiency, and the power generation effect of the device is relatively poor.

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