Colored water siphon valve type electronically controlled feeder and method for Reynolds experiment

Abstract

The invention discloses a special colored water siphon valve type electronic control feeder for a Reynolds experiment and a method thereof. The feeder comprises a colored water storage box, air tubes, an electronic control three-way air valve, an air pump, an air tap, a colored water filling port and sealing cover, a siphon, a colored water discharge tube, an electronic control two-way air valve, a colored water injection needle and a control circuit; electronic control for opening, closing or concentrating of the colored water can be completed under the operation of the control circuit. According to the feeder and the method, a series of defects that blocking is easy, dredging is difficult, the concentration is difficult to adjust, the operation is inconvenient and the like during regulation of a traditional micro valve for the colored water are overcome, and particularly, the blank of the electronic control feeder for the colored water in the automated control type Reynolds experiment is filled up.

Description

technical field [0001] The invention relates to a teaching experiment instrument for fluid mechanics and hydraulics. In particular, it relates to a special-purpose colored water siphon valve type electric control feeder for Renault's experiment and a method thereof. Background technique [0002] The Reynolds experiment is one of the traditional classic must-do experiments in fluid mechanics hydraulics. With the application of modern technology, the development of automated control type Renault experimental system is also in progress. [0003] The Reynolds experiment requires observing the laminar flow and turbulent flow state of the pipe flow, and measuring the critical Reynolds number. To observe the flow state of the pipe flow, colored water is added into the pipe as a tracer liquid. Observe the flow of the tracer fluid to understand the flow behavior of laminar and turbulent flow. The amount of colored water added is equivalent to the infusion amount of people when in...

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Problems solved by technology

The existing problems are: 1. After long-term shutdown, the hose loses its elasticity and often fails to open; 2. The connecting hose and its colored water injection needle are easily blocked by air bubbles or small particles, especially the colored water stuck in the tube after the experiment. The water cannot be excluded, and the needle tube is often scrapped after drying, which makes it difficult for the maintenance of the experimental instrument; 3. In this experiment, the amount of colored water required for laminar flow is small and easy to meet, but in the case of turbulent flow, due to the water flow of the pipe flow The flow rate is relatively high, and the concentration of colored water is required to be enhanced to display and allow students to see the phenomenon of smog-like diffusion and turbulence

In the traditional method, when the elevation of the colored water tank is fixed, the supply of colored water should be increased in the experiment, and the concentration of colored water cannot be enhanced, and the concentration is difficult to adjust

4. In the automatic control type Renault experimental system, the original experimental device cannot realize automatic electronic control, and there is no similar product related to the colored water electric control supplier on the market

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