Reynolds test instrument

Abstract

The present invention discloses a Reynolds experiment instrument. It is characterized by that in the constant pressure zone of its constant pressure water tank a permeation cover is set, said permeation cover can be used for covering upper portion of water inlet of experiment tube, the space covered by said permeation cover is formed into a water-stabilizing zone, and the water body in the water-stabilizing zone of said experiment instrument can not be interfered by water of water inlet tube.

Description

technical field [0001] The invention relates to an experimental teaching instrument, in particular to a Renault experimental instrument. Background technique [0002] The Reynolds tester enters water into the constant pressure area in the constant pressure water tank through the water inlet pipe, and the water in the constant pressure area overflows through the overflow plate and flows to the overflow area to discharge the overflow water, while maintaining the water surface height of the constant pressure area, that is, water constant pressure. Then, through the guide tube of the tracer container at the upper part of the constant pressure area and the needle at the end, the tracer flows to the center of the inlet of the experiment tube at the bottom of the constant pressure area. By adjusting the flow rate of water in the test tube, the flow of the tracer in the test tube can be observed, thereby demonstrating the laminar flow and turbulent flow of the liquid and the transi...

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Problems solved by technology

Ordinary Reynolds tester, the water in the constant pressure water tank enters directly through the water inlet pipe, so the water body is greatly disturbed by vibration, and the water head flowing into the test pipe is difficult to achieve constant; in recent years, there are also patents that have slightly improved this, such as patent No. 200410025778.4 The "automatic decolorization self-circulation Reynolds experimental instrument", which sets a water stabilizing plate with holes on the side in the constant water area, the water flow enters the water stabilizing area through the opening of the water stabilizing plate, and flows into Experimental tubes were used for demonstration; however, since only one side of the water stabilizing plate is opened, the number of openings is limited and the aperture is relatively large. Therefore, the water entering the stable water area through the openings of the water stabilizing plate is still disturbed by the vibration of flowing water , the water entering the experimental tube also cannot reach a constant

As a result, the demonstration effect of the water flow phenomenon in the experimental tube is unstable, laminar flow, turbulent flow and the transition state between the two are not easy to define, and the measured critical Reynolds number has large errors and changes, making it difficult to achieve the purpose of experimental teaching

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