A visualization research device for flexible body motion in uniform incoming flow

Abstract

The invention discloses a flexible body motion visual researching device in uniform flow. The device comprises a fan which is provided with an air outlet with the sectional area of S1, a stability tube, a transition tube, an experiment tube, a diffusion tube and a bracket. The stability tube is communicated with the air outlet of the fan. The sectional area of the stability tube is S2, wherein S2 is greater than or equal to 5S1. The transition pipe is communicated with the stability tube and is a straight tube. The experiment tube is communicated with the transition tube and is made of a transparent material. The diffusion tube is communicated with the experiment tube and is a straight tube. The diameter of the diffusion tube is D3. The length of the diffusion tube is L3, wherein L3 is greater than or equal to 6D3. The bracket is arranged in the experiment tube. The diameter of the inlet of the experiment tube is consistent with the diameter of the outlet of the transition tube. The fan, the stability tube, the transition tube, the experiment tube and the diffusion tube are successively assembled in order. The motion trajectory, the velocity and the shape of a flexible body can be directly observed or filmed by a high speed camera. Three-dimensional visual flexible body research is realized. The flow velocity is not restricted. The device is applied to the experiment of a flexible body of a large Reynolds number.

Description

technical field [0001] The invention relates to a flexible body research device, in particular to a flexible body motion visualization research device in a uniform incoming flow. Background technique [0002] Pneumatic conveying is commonly used in various new spinning processes, such as rotor spinning, air-jet vortex spinning, etc., and this kind of spinning process uses flexible bodies such as fibers as raw materials, and its yarn quality and efficiency depend on the flexible body in the conveying process. The movement in the cavity, and the coupling between the flexible body and the gas flow. Therefore, it is of great significance to study the motion of flexible bodies in uniform flow. [0003] Among them, the flexible body mainly refers to the fiber, and the new open-end spinning (such as rotor spinning) mainly relies on the airflow to realize the transportation of the fiber. That is, the fiber cluster) is separated into single fibers by carding under the action of the...

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Problems solved by technology

[0005] But in fact, the movement process of the flexible body in the delivery cavity is relatively complicated, and the movement of the flexible body in the flowing soap film cannot achieve three-dimensional measurement results, so there is a big difference from the actual movement, which cannot provide the most realistic for experimental research. Data information

In addition, the incoming flow velocity cannot be adjusted or the adjustable range is very small, so the research on the movement of flexible filaments can only be realized under the condition of low Reynolds number, because the soap film is easy to break at high Reynolds number

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