Experiment device and method for measuring terminal velocity of extending liquid globule through tower type pipe
A tower-type, small-ball technology, applied in measurement devices, flow characteristics, instruments, etc., can solve the problems of low accuracy of measurement results, cumbersome experimental process, and large dispersion of experimental data, so as to improve experimental efficiency and accuracy. , the effect of improving the accuracy
Inactive Publication Date: 2016-07-06
QIQIHAR UNIVERSITY
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The principle of the above method is clear and easy for students to understand, but the experimental process is cumbersome, and is affected by the change of the initial conditions of the experiment and the error caused by multiple experimental operations. In reality, the experimental data obtained by students is highly discrete and the accuracy of the measurement results is not high.
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and a specific embodiment.
[0027] Such as figure 1 As shown, it is a schematic diagram of the experimental device for measuring the tailing velocity of the extended liquid ball in the tower tube of the present invention, and performing the falling ball experiment.
[0028] Such as figure 1 As shown, the tower tube 1 is installed vertically in the middle of the base 6, and the base 6 is provided with a plurality of leveling screws 7. The left column 2 and the right column 3 are vertically fixed on the base 6. Eight laser generators 4 are arranged on the side of the left column 2 close to the tower tube 1. The laser receiver 5 on the right column 3 and the laser generator 4 are arranged along the tower tube. The vertical central axis of the formula pipe 1 is distributed symmetrically. Wherein, the distance between the uppermost one and the lowermost one of the laser ge...
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Abstract
The invention provides an experiment device and method for measuring the terminal velocity of an extending liquid globule through a tower type pipe. The device is composed of the tower type pipe, a left stand column, laser generators, a right stand column, laser receivers, a base, leveling screws, a laser timer and the globule, a head segment, multiple middle segments and a tail segment which are in equal difference in inner diameter are connected into a tower-shaped hollow pipe which is uniform in wall thickness through hollow truncated-cone-shaped transition segments, the terminal velocity corresponding to the pipe segments different in diameter can be obtained through a one-time experiment, experiment efficiency is improved, and influence of external factors is reduced. Meanwhile, the invention provides a method for conducting repeated experiments by arranging the tower type pipe uprightly and invertedly. The method comprises the steps of obtaining the terminal velocity of the globule in the positive and negative fall processes between the pipe segment large in diameter and the pipe segment small in diameter, fitting the two groups of data, and taking the mean value of intercepts of a fitted curve on the velocity axis, so that the terminal velocity of the globule under the extending liquid environment is obtained. By means of the experiment device and method for measuring the terminal velocity of the extending liquid globule through the tower type pipe, experiment precision is improved, and the experiment device and method are simple, clear, fast, convenient and suitable for experiment teaching.
Description
technical field [0001] The invention relates to a physical experiment device and method, in particular to an experimental device and method for measuring the tailing velocity of an extended liquid ball with a tower tube. Background technique [0002] The viscosity coefficient of liquid is of great significance to the fields of industry and agriculture, water conservancy engineering, medical diagnosis, etc. In the laboratory, the falling ball method is often used to measure the viscosity coefficient of liquids with a large viscosity coefficient. The falling ball method is intuitive and simple, and is the basis of university physics. experiment. The falling ball method is based on the balance of gravity, buoyancy, and viscous resistance of a slowly falling ball in a still liquid to obtain the viscous resistance of the ball, measure the final velocity of the falling ball, and then use the Stokes formula Find the viscosity coefficient of the liquid. [0003] The Stokes formula...
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IPC IPC(8): G01N11/12
CPCG01N11/12
Inventor 刘相梅
Owner QIQIHAR UNIVERSITY