Reynolds experiment device

Abstract

The utility model provides a Reynolds experiment device which comprises a water storage tank, the bottom of the water storage tank is communicated with a drain pipe, and the bottom end of the drain pipe is communicated with a waste water tank. The first experiment assembly comprises a first experiment water tank, a first pore plate, a first colored pigment pipe, a first water inlet pipe and a first experiment pipe; the second experiment assembly comprises a second experiment water tank, a second pore plate, a second colored pigment pipe, a second water inlet pipe, a second experiment pipe and a round hole. The Reynolds experimental device provided by the utility model adopts a passive experimental dynamic pressure head, saves the cost of a water supply pump, greatly reduces the cost, is convenient to operate, is provided with an experimental control group, changes basic parameters in a Reynolds number formula through a Reynolds number formula principle, and improves the experimental accuracy through contrast experiments. An experimenter can deeply research and understand different states of fluid flowing, the device is simple in structure, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the field of fluid experiments, in particular to a Reynolds experiment device. Background Art

[0002] The Reynolds experiment is a classic experiment in fluid mechanics to study the motion state of fluids. It was conducted by British scientist Osborne Reynolds in 1883. The experiment is mainly to explore the transition phenomenon between laminar and turbulent states in fluid dynamics. The results of the Reynolds experiment are of great significance for understanding fluid dynamics and its application in aerospace, automobile design, energy engineering and other fields. Especially in the teaching of fluid mechanics and thermodynamics, the Reynolds experiment is a basic and key demonstration experiment.

[0003] At present, the fluid mechanics experimental devices on the market are large, expensive, and have extremely high maintenance costs. This is because most of the fluid mechanics devices on the market are powered by water pumps, the experimental phenomena for specific experiments are not obvious, and there is no control group for comparative experiments. Experimenters cannot deeply understand the principles of the experiment.

[0004] Therefore, it is necessary to provide a new Renault experimental device to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a Renault experiment device which is easy for students to understand.

[0006] The Renault test device provided by the utility model comprises:

[0007] A water storage tank, the bottom of which is connected to a drain pipe, the bottom end of which is connected to a waste water tank, and the waste water tank is arranged below the water storage tank;

[0008] A first experimental assembly, the first experimental assembly is arranged inside the water storage tank, the first experimental assembly comprises a first experimental water tank, a first orifice plate, a first colored pigment tube, a first water inlet pipe and a first experimental tube, the first experimental water tank is fixed to the inner wall of the water storage tank, the first orifice plate is fixed to the inner wall of the first experimental water tank, the first colored pigment tube is connected to the inner wall of the first orifice plate, the first water inlet pipe is arranged above the first experimental water tank, the first experimental tube is connected to the bottom of the first experimental water tank, and the other end of the first experimental tube passes through the water storage tank and is connected to the inside of the waste water tank;

[0009] The second experimental component is arranged inside the water storage tank, the second experimental component includes a second experimental water tank, a second orifice plate, a second colored pigment tube, a second water inlet pipe, a second experimental tube and a circular hole, the second experimental water tank is fixed to the inner wall of the water storage tank, the second orifice plate is fixed to the inner wall of the second experimental water tank, the second colored pigment tube is connected to the inner wall of the second orifice plate, the second water inlet pipe is arranged above the second experimental water tank, the second experimental tube is connected to the bottom of the second experimental water tank, the other end of the second experimental tube passes through the water storage tank and is connected to the inside of the waste water tank, and a circular hole is opened on the inner wall of the second orifice plate.

[0010] As a Renault test device provided by the utility model, preferably, a funnel for putting in the colored pigment is fixed at the top of the first colored pigment tube and the top of the second colored pigment tube.

[0011] As a Renault test device provided by the utility model, preferably, the inner walls of the first water inlet pipe and the second water inlet pipe are both provided with stop valves for controlling water inlet.

[0012] As a Renault test device provided by the utility model, preferably, one side of the wastewater tank is connected to a wastewater pipe for facilitating the discharge of wastewater in the tank.

[0013] As a Renault test device provided by the utility model, preferably, universal wheels are fixed to the four corners of the bottom of the wastewater tank for facilitating its movement.

[0014] As a Renault test device provided by the utility model, preferably, the drainage pipe, the first colored pigment tube, the first test tube, the second colored pigment tube and the second test tube are all configured as transparent plastic tubes.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This device uses passive force (water's own gravity) as the experimental power pressure head, saving the cost of water supply pump. The cost is greatly reduced and the operation is convenient.

[0017] 2. This device sets up an experimental control group. Through the principle of the Reynolds number formula, the basic parameters in the Reynolds number formula are changed. Through comparative experiments, the experimenter can deeply study and understand the different states of fluid flow. The device has a simple structure and improves the practical performance of the device.

[0018] 3. In the control test group of this device, the fluid is heated by the heating rod to change the viscosity coefficient of the fluid, thereby showing different flow phenomena. Heating by heating rods of different powers can more clearly show the effect of viscosity on the flow state of the fluid. The heating rod is cheap, which can greatly save costs and has a very high cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a preferred embodiment of the Renault test device provided by the utility model;

[0020] Figure 2 It is a schematic diagram of the structure inside the water storage tank and the waste water tank in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the first experimental component in the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the second experimental component in the utility model.

[0023] Numbers in the figure: 1. Water tank; 2. Drain pipe; 3. Wastewater tank; 4. First experimental component; 41. First experimental water tank; 42. First orifice plate; 43. First colored pigment tube; 44. First water inlet pipe; 45. First experimental tube; 5. Second experimental component; 51. Second experimental water tank; 52. Second orifice plate; 53. Second colored pigment tube; 54. Second water inlet pipe; 55. Second experimental tube; 56. Round hole; 6. Funnel; 7. Stop valve; 8. Wastewater pipe; 9. Universal wheel. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in Figure 1 A schematic structural diagram of a preferred embodiment of the Renault test device provided by the utility model; Figure 2 It is a schematic diagram of the structure inside the water storage tank and the waste water tank in the utility model; Figure 3 It is a structural schematic diagram of the first experimental component in the utility model; Figure 4 A Renault experiment device includes a water storage tank 1, a first experiment component 4 and a second experiment component 5. The bottom of the water storage tank 1 is connected to a drain pipe 2, and the bottom end of the drain pipe 2 is connected to a waste water tank 3. The waste water tank 3 is arranged below the water storage tank 1.

[0026] In the specific implementation process, Figure 2 and Figure 3As shown, the first experimental component 4 is arranged inside the water tank 1, and the first experimental component 4 includes a first experimental water tank 41, a first orifice plate 42, a first colored pigment tube 43, a first water inlet pipe 44 and a first experimental tube 45. The first experimental water tank 41 is fixed to the inner wall of the water tank 1, the first orifice plate 42 is fixed to the inner wall of the first experimental water tank 41, the first colored pigment tube 43 is connected to the inner wall of the first orifice plate 42, the first water inlet pipe 44 is arranged above the first experimental water tank 41, the first experimental tube 45 is connected to the bottom of the first experimental water tank 41, and the other end of the first experimental tube 45 passes through the water tank 1 and is connected to the inside of the wastewater tank 3.

[0027] It should be noted that: by setting up the water storage tank 1, when the experiment can be carried out, the water overflowing from the first experimental water tank 41 and the second experimental component 5 can be stored; by setting up the drainage pipe 2, the water in the water storage tank 1 can be easily discharged into the wastewater tank 3; by setting up the wastewater tank 3, the wastewater generated by the experiment can be collected; by setting up the first water inlet pipe 44, the water enters the first experimental water tank 41 through the first orifice plate 42; the first orifice plate 42 can stabilize the water flow; when the first experimental water tank 41 is full (the water tank remains in an overflow state), the valve of the first experimental tube 45 is opened, and the water flows into the wastewater tank 3 by the gravity of the water itself; by setting up the first colored pigment tube 43, the colored pigment (chalk powder water, fountain pen water, etc.) is sent into the first experimental tube 45 through the funnel 6.

[0028] refer to Figure 2 and Figure 4 As shown, the second experimental component 5 is arranged inside the water storage tank 1, and the second experimental component 5 includes a second experimental water tank 51, a second orifice plate 52, a second colored pigment tube 53, a second water inlet pipe 54, a second experimental tube 55 and a circular hole 56. The second experimental water tank 51 is fixed to the inner wall of the water storage tank 1, the second orifice plate 52 is fixed to the inner wall of the second experimental water tank 51, the second colored pigment tube 53 is connected to the inner wall of the second orifice plate 52, the second water inlet pipe 54 is arranged above the second experimental water tank 51, the second experimental tube 55 is connected to the bottom of the second experimental water tank 51, and the other end of the second experimental tube 55 passes through the water storage tank 1 and is connected to the interior of the wastewater tank 3. A circular hole 56 is opened on the inner wall of the second orifice plate 52.

[0029] It should be noted that: by setting up a second water inlet pipe 54, water enters the second experimental water tank 51 through the second orifice plate 52. The second orifice plate 52 can stabilize the water flow. When the second experimental water tank 51 is full (the water tank remains in an overflow state), the valve of the second experimental tube 55 is opened, and the water flows into the wastewater tank 3 by the gravity of the water itself. By setting up a second colored pigment tube 53, colored pigments (chalk powder water, fountain pen water, etc.) are sent into the second experimental tube 55 through the funnel 6. By setting up a circular hole 56, heating rods with different powers can be placed to heat the water in the second experimental water tank 51.

[0030] refer to Figure 1 , Figure 3 and Figure 4 As shown, a funnel 6 for conveniently putting in colored pigments is fixed at the top of each of the first colored pigment tube 43 and the second colored pigment tube 53 .

[0031] The inner walls of the first water inlet pipe 44 and the second water inlet pipe 54 are both provided with stop valves 7 for controlling water inlet.

[0032] One side of the waste water tank 3 is connected with a waste water pipe 8 for discharging waste water in the tank.

[0033] Universal wheels 9 are fixed to the four corners of the bottom of the waste water tank 3 to facilitate its movement.

[0034] The drainage pipe 2, the first colored pigment tube 43, the first experimental tube 45, the second colored pigment tube 53 and the second experimental tube 55 are all configured as transparent plastic tubes.

[0035] It should be noted that: by setting the funnel 6, it is convenient to put colored pigment into the first colored pigment tube 43 and the second colored pigment tube 53, by setting the stop valve 7, the water inlet of the first water inlet pipe 44 and the second water inlet pipe 54 can be controlled, by setting the wastewater pipe 8, the discharge of wastewater in the wastewater tank 3 can be facilitated, and by setting the universal wheel 9, the equipment can be driven to move.

[0036] The working principle of a Renault test device provided by the utility model is as follows:

[0037] When in use, the water storage tank 1 is set to store the overflow water from the first experimental water tank 41 and the second experimental assembly 5 when the experiment is possible. The water in the water storage tank 1 can be easily discharged to the waste water tank 3 by setting the drainage pipe 2. The waste water tank 3 can collect the waste water generated by the experiment. The first water inlet pipe 44 is set to allow the water to enter the first experimental water tank 41 through the first orifice plate 42. The first orifice plate 42 can stabilize the water flow. When the first experimental water tank 41 is full, the valve of the first experimental pipe 45 is opened, and the water is discharged by the gravity of the water itself. Water flows into the wastewater tank 3. By setting the first colored pigment tube 43, the colored pigment is sent into the first experimental tube 45 through the funnel 6. The valve of the first experimental tube 45 is adjusted (the flow rate is changed). According to the size of the flow rate, the fluid has two different forms. When the fluid flow rate is small, the fluid particles only move in one dimension along the flow direction, and there is no macroscopic mixing with the surrounding fluid, that is, stratified flow. This flow form is called laminar flow. After the fluid flow rate increases to a certain value, the fluid particles move randomly in other directions in addition to the flow in the flow direction, that is, there is irregular pulsation of the fluid particles. This fluid form is called turbulent flow. Finally, the colored pigment water flows into the wastewater tank 3, and the wastewater is discharged through the wastewater pipe 8, and the Reynolds experiment can be completed. Water enters from the first water inlet pipe 44 and the second water inlet pipe 54, passes through the first orifice plate 42 and the second orifice plate 52 (the orifice plate stabilizes the water flow) and flows into the first experimental water tank 41 and the second experimental water tank 51 at the same time. When the two experimental water tanks are full of water, the valves of the first experimental tube 45 and the second experimental tube 55 are opened, and the water itself The gravity causes the water to flow into the wastewater tank 3. (When the two experimental water tanks are full of water, the water will flow into the water storage tank 1 and enter the wastewater tank 3 through the drain pipe 2.) The colored pigment is sent into the two experimental tubes through the first colored pigment tube 43 and the second colored pigment tube 53. The valves of the two experimental tubes are adjusted to show two different flow states of the fluid. This experiment uses the Reynolds number principle formula Re=ρVD / μ to change D (the diameter of the fluid flowing through the pipe) in the formula. Through the control experiment of the two experimental tubes, different experimental phenomena can be shown.The larger the diameter of the experimental tube, the greater the flow rate flowing through the thicker tube in the same time, that is, the greater the flow rate, the greater the Reynolds number, and the fluid quickly enters a turbulent flow state, but it is not obvious. According to the experimental phenomena in the two tubes, the law of the flow state transformation of the circular tube is analyzed to deepen the understanding of the Reynolds number. Finally, the colored pigment water in the two experimental tubes flows into the wastewater tank 3, and the wastewater is discharged through the wastewater pipe 8 to complete the control experiment; water enters from the first water inlet pipe 44 and the second water inlet pipe 54, passes through the first orifice plate 42 and the second orifice plate 52 (the orifice plate stabilizes the water flow) and flows into the first experimental water tank 41 and the second experimental water tank 51 at the same time. When the two experimental water tanks are full of water, open the valves of the first experimental tube 45 and the second experimental tube 55, and use the gravity of the water itself to make the water flow into the wastewater tank 3, and send the colored pigment into the two experimental tubes through the first colored pigment tube 43 and the second colored pigment tube 53, and adjust the two experimental tubes. The valve shows two different flow states of the fluid. Heating rods with different powers are placed through the circular hole 56 of the second experimental water tank 51 to heat the water in the second experimental water tank 51. This experiment uses the Reynolds number principle formula Re=ρVD / μ, changes D (the diameter of the pipe through which the fluid flows), and changes μ (the dynamic viscosity of the fluid is related to temperature) in the formula. After two experimental tube control experiments, different experimental phenomena can be shown. The greater the viscosity of the fluid in the experimental tube, the greater the fluid resistance, the smaller the flow rate, the smaller the Reynolds number, and the fluid quickly becomes a laminar flow state. The experimental phenomenon is obvious. Therefore, viscosity is of great significance for studying the flow state of the fluid. According to the experimental phenomena in the two tubes, the law of the flow state transformation of the circular tube is analyzed to deepen the understanding of the Reynolds number. Finally, the colored pigment water in the two experimental tubes flows into the wastewater tank 3, and the wastewater is discharged through the wastewater pipe 8 to complete the control experiment.

[0038] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A Renault test device, characterized in that: include: A water storage tank (1), wherein the bottom of the water storage tank (1) is connected to a drainage pipe (2), the bottom end of the drainage pipe (2) is connected to a waste water tank (3), and the waste water tank (3) is arranged below the water storage tank (1); A first experimental assembly (4), the first experimental assembly (4) being arranged inside the water storage tank (1), the first experimental assembly (4) comprising a first experimental water tank (41), a first orifice plate (42), a first colored pigment tube (43), a first water inlet pipe (44) and a first experimental tube (45), the first experimental water tank (41) being fixed to the inner wall of the water storage tank (1), the first orifice plate (42) being fixed to the inner wall of the first experimental water tank (41), the first colored pigment tube (43) being connected to the inner wall of the first orifice plate (42), the first water inlet pipe (44) being arranged above the first experimental water tank (41), the first experimental tube (45) being connected to the bottom of the first experimental water tank (41), and the other end of the first experimental tube (45) passing through the water storage tank (1) and being connected to the interior of the waste water tank (3); A second experimental assembly (5), the second experimental assembly (5) is arranged inside the water storage tank (1), the second experimental assembly (5) comprises a second experimental water tank (51), a second orifice plate (52), a second colored pigment tube (53), a second water inlet pipe (54), a second experimental tube (55) and a circular hole (56), the second experimental water tank (51) is fixed to the inner wall of the water storage tank (1), the second orifice plate (52) is fixed to the inner wall of the second experimental water tank (51), the second colored pigment tube (53) is connected to the inner wall of the second orifice plate (52), the second water inlet pipe (54) is arranged above the second experimental water tank (51), the second experimental tube (55) is connected to the bottom of the second experimental water tank (51), the other end of the second experimental tube (55) passes through the water storage tank (1) and is connected to the inside of the waste water tank (3), and the inner wall of the second orifice plate (52) is provided with a circular hole (56).

2. The Renault test device according to claim 1, characterized in that: Funnels (6) for conveniently adding colored pigments are fixed at the tops of the first colored pigment tube (43) and the second colored pigment tube (53).

3. The Renault test device according to claim 1, characterized in that: The inner walls of the first water inlet pipe (44) and the second water inlet pipe (54) are both provided with stop valves (7) for controlling water inlet.

4. The Renault test device according to claim 1, characterized in that: One side of the waste water tank (3) is connected to a waste water pipe (8) for facilitating the discharge of waste water in the tank.

5. The Renault test device according to claim 1, characterized in that: Universal wheels (9) are fixed to the four corners of the bottom of the waste water tank (3) to facilitate its movement.

6. The Renault test device according to claim 1, characterized in that: The drainage pipe (2), the first colored pigment tube (43), the first experimental tube (45), the second colored pigment tube (53) and the second experimental tube (55) are all configured as transparent plastic tubes.

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