An Experimental Method of Bernoulli's Equation for Constant Pressure Water Supply

Abstract

The invention discloses a Bernoulli equation experiment method of constant-pressure water supply. According to the Bernoulli equation experiment method, a main water tank and a secondary water tank are selected, wherein the secondary water tank is of a sealed metal cylindrical shape; the top of the secondary water tank is made into a convex spherical surface, and the highest part of the center of the spherical surface is made into a small platform; the platform is equipped with a water inlet valve communicated with the main water tank, an air vent is further formed and is plugged by a sealing plug, and a glass pipe is inserted into the sealing plug; and a water outlet valve is mounted at the bottom of the secondary water tank and is connected with a measurement part of a Bernoulli equation experiment instrument. When the secondary water tank is fully filled with water, the water inlet valve is switched off, the water outlet valve is switched on, and the water flows out; firstly, a water column in a fine glass tube rapidly falls into a pipe opening at a lower end part of the glass tube and does not fall off any more, and the pressure on the liquid surface is atmospheric pressure; and the pressure on the water outlet valve is not changed all the time, and water steadily flowing is output. In an experiment, no noise exists, the needed water amount is very small, and electric power equipment is not needed, so that the Bernoulli equation experiment method is safe and reliable.

Description

technical field [0001] The invention relates to a physical experiment method, in particular to a Bernoulli equation experiment method for constant pressure water supply. Background technique [0002] The Bernoulli equation is the most basic and important equation in fluid mechanics. The verification of the Bernoulli equation should be a must-do experiment in all science and engineering majors in colleges and universities. However, for the steady flow under ideal fluid conditions, the physical quantities such as pressure, velocity and density at any point in the fluid do not change with time. It is necessary to use instruments that work with long flow of water under constant water flow to carry out the verification experiment of Bernoulli's equation. In the existing Bernoulli equation experiments, water pumps are used to continuously supply water to a water tank with a fixed height (capacity), so that the water flow continuously overflows, so as to ensure that the water level...

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Problems solved by technology

[0003] 1. The water pump must be in working condition before and during the experiment, and the noise generated is very loud, especially in the water tank made of metal, the noise is even louder

If it is a group experiment, when several instruments work at the same time, the noise drowns out the voice of the speech, and the teacher cannot guide the students in the experiment

[0004] 2. In order to ensure the continuous overflow of the water flow from the water tank, a large amount of water is required, and the required devices are complicated and occupy a large space

[0005] 3. Need electric power to drive the water pump, water and electric equipment work at the same time, poor safety

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