Multiple moveable wall surface drag reduction device for fluid

Abstract

One kind of fluid friction force reducer is arranged between fluid to be resistance reduced and object surface. It consists of turntable, bearing, rack, movable walls and subsidiary parts. The movable walls around the turntable move with the turntable and have their parts contacting fluid moving with the fluid to reduce resistance to the fluid. Each of the movable walls consists of several layers of wall, and the wall layers can slide freely in fixed direction. Between different wall layers, lubricating fluid is filled, and the internal fluid and external fluid are maintained in balanced pressure. There may be subsidiary movable walls inside the device. The present invention may be used in different fluid resistance reducing fields.

Description

technical field

[0001] The invention relates to a drag reducing device for reducing fluid frictional resistance. Background technique

[0002] For a long time, when people have been looking for ways to reduce fluid resistance, their attention has only been focused on and limited to the shape of the body, that is, to explore the streamlined aspect of the object. The current air resistance reduction design of high-speed trains, missiles, and automobiles is still at this stage. After the establishment of the boundary layer theory, after years of development, drag reduction methods can be roughly divided into four categories according to different ways to reduce viscous drag. One is the method of locally changing the fluid near the boundary, such as hovercraft technology and air lubrication technology. The resistance potential is considerable, but the specific technology and technological measures to realize the replacement of viscous fluids with very different viscosities and s...

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