CN206516192U - Fluid velocity distribution experiments instrument - Google Patents
Fluid velocity distribution experiments instrument Download PDFInfo
- Publication number
- CN206516192U CN206516192U CN201621293890.0U CN201621293890U CN206516192U CN 206516192 U CN206516192 U CN 206516192U CN 201621293890 U CN201621293890 U CN 201621293890U CN 206516192 U CN206516192 U CN 206516192U
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- China
- Prior art keywords
- pipe
- fluid
- valve
- velocity distribution
- head tank
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Abstract
The utility model is related to a kind of fluid velocity distribution experiments instrument, including for filling the head tank of fluid, the bottom of head tank is connected sets the first valve on transparent pipe, pipe；The porch of pipe is provided with several syringe needles, and syringe needle is all connected with ink bottle, and syringe needle carries the second valve.The utility model is by setting head tank to fill fluid, released by transparent pipe, syringe needle is set in pipe porch simultaneously, colored fluid is passed through in the fluid flowed by syringe needle into pipe, by adjusting the first Valve controlling rate of flow of fluid, colored fluid is flowed out by the different syringe needles of the second Valve controlling, demonstrated with carrying out laminar flow of fluid and turbulent flow, the VELOCITY DISTRIBUTION state that fluid flows in pipe can be simulated, beneficial to observation directly perceived；In teaching demonstration, student can be helped to understand the concept of VELOCITY DISTRIBUTION state and boundary layer and laminar flow internal layer of the fluid in pipeline well.
Description
【Technical field】
The utility model belongs to Experiment of Principles of Chemical Engineering instrument, and in particular to a kind of fluid velocity distribution experiments instrument.
【Background technology】
When fluid flows in pipe, on pipe cross section, what fluid velocity was unevenly distributed, pipeline axis is upper
Rate of flow of fluid is maximum, smaller closer to tube wall rate of flow of fluid, and the flow velocity of the fluid of tube wall contact is zero.Currently without laboratory apparatus
For reflecting VELOCITY DISTRIBUTION state that fluid flows in pipe, student is caused to understand the VELOCITY DISTRIBUTION of fluid and boundary layer
Proximate nutrition with laminar flow internal layer is difficult.
【The content of the invention】
The purpose of this utility model is to overcome problems of the prior art that there is provided a kind of fluid velocity distribution experiments
Instrument, can simulate the VELOCITY DISTRIBUTION state that fluid flows in pipe, beneficial to observation directly perceived.
In order to achieve the above object, the utility model is adopted the following technical scheme that：
Including the head tank for filling fluid, the bottom of head tank is connected sets the first valve on transparent pipe, pipe；
The porch of pipe is provided with several syringe needles, and syringe needle is all connected with ink bottle, and syringe needle carries the second valve；The bottom of head tank
Circulating water chennel is connected by the first pipeline and the second pipeline, circulation loop is formed；Compression pump is installed on first pipeline；Head tank
Bottom offers a water inlet and two delivery ports, and water inlet is connected with the first pipeline, and delivery port is symmetrically opened in water inlet
Both sides；One of delivery port connecting circular tube, another delivery port connects the entrance of the second pipeline, and the outlet of the second pipeline is located at
In circulating water chennel；Overflow baffle is provided between water inlet and two delivery ports.
Further, syringe needle is five.
Further, syringe needle is separately positioned on the center of pipe, 3/4ths radiuses, two/Radius, a quarter
At radius and tube wall.
Further, the second valve is impulse valve.
Further, it is also equipped with flowmeter on pipe.
Further, permeable hole is set in the middle of overflow baffle bottom surface and the position of head tank contact.
Further, ink bottle is arranged on ink bottle rack, and ink bottle rack is arranged on above head tank.
Further, length scale is provided with pipe, pipe caliber is in more than 50mm.
Compared with prior art, the utility model has following beneficial technique effect：
The utility model is released, while being set in pipe porch by setting head tank to fill fluid by transparent pipe
Syringe needle is put, colored fluid, such as ink are passed through in the fluid flowed by syringe needle into pipe, by adjusting the first Valve controlling
Rate of flow of fluid, colored fluid is flowed out by the different syringe needles of the second Valve controlling, is demonstrated with carrying out laminar flow of fluid and turbulent flow, Neng Goumo
The VELOCITY DISTRIBUTION state that fluid analogy flows in pipe, beneficial to observation directly perceived；In teaching demonstration, well student can be helped to manage
Solve the concept of VELOCITY DISTRIBUTION state and boundary layer and laminar flow internal layer of the fluid in pipeline.
Further, syringe needle is arranged on pipe diverse location in the utility model, beneficial to the speed of diverse location in simulation pipe
Spend distribution.
Further, the utility model is by forming circulation loop, using water wisely.
Further, head tank is divided into three water tanks, it is ensured that in head tank by the utility model by setting overflow baffle
Water to during pipe flow, its liquid level is not rocked acutely, it is to avoid influence demonstrating effect.
Further, the utility model is by setting permeable hole, beneficial to remaining in terminating the empty head tank of heel row in demonstration
Water.
Further, the utility model can be made by setting the ink bottle rack being located above head tank using gravity
With colored fluid is released, the energy is saved.
Further, the utility model on pipe by setting length scale, beneficial to calculating fluid velocity.
【Brief description of the drawings】
Fig. 1 is structural representation of the present utility model；
Fig. 2 is syringe needle distributing position sectional view in the utility model.
Wherein：1- ink bottles；2- ink bottle racks；3- overflow baffles；4- head tanks；5- permeable holes；6- syringe needles；7- flows
Meter；The valves of 8- first；9- compression pumps；10- circulating water chennels.
【Embodiment】
The utility model is described in further details below in conjunction with the accompanying drawings.
Referring to Fig. 1, the utility model includes the head tank 4 for being used to fill fluid I, and the bottom of head tank 4 connects transparent circle
The valve 8 of flowmeter 7 and first is set on pipe, pipe；The porch of pipe is provided with several syringe needles 6, and syringe needle 6 carries second
Valve, the second valve is impulse valve.Syringe needle 6 is all connected with ink bottle 1, and ink bottle 1 is arranged on ink bottle rack 2, ink bottle
Support 2 is arranged on the top of head tank 4.Fluid II is housed, fluid II is different with fluid I color and can dissolve each other in ink bottle；
Fluid I typically uses colourless liquid such as water, and fluid II can use colored dyes such as red ink.
The bottom of head tank 4 offers a water inlet and two delivery ports, and water inlet is connected with the outlet of the first pipeline,
The outlet of the entrance of first pipeline and the bottom of circulating water chennel 10 is connected, and compression pump 9 is installed on the first pipeline；The water outlet of head tank 4
Mouth is symmetrical to be opened in water inlet both sides, and the entrance of one of delivery port connecting circular tube, another delivery port connects the second pipeline
Entrance, the outlet of the second pipeline is located in circulating water chennel 10, and the bottom of head tank 4 passes through the first pipeline and the second pipeline is connected
Circulating water chennel 10, forms circulation loop；Be provided with overflow baffle 3 between water inlet and two delivery ports, overflow baffle 3 it is main
Effect has two：One is that the height of overflow baffle 3 determines the height of water level in head tank 4, and two are to ensure that left side in head tank 4
Water tank is that the water level above syringe needle 6 is not rocked acutely.Compression pump 9 is not closed during experiment, keeps the water surface elevation of head tank 4 permanent
It is fixed.Permeable hole 5 is set in the middle of the position that the bottom surface of overflow baffle 3 and head tank 4 are contacted, the effect of permeable hole 5 be experiment terminate with
After be easy to emptying head tank 4 in remaining water.
Referring to Fig. 2, syringe needle 6 is five, and is separately positioned on the center of pipe, 3/4ths radiuses, two/Radius,
At a quarter radius and tube wall.And as far as possible scatter, such as 3/4ths radiuses, two/Radius, a quarter radius and
Syringe needle 6 at tube wall is located at the four direction of pipe center syringe needle 6 respectively, can preferably demonstrate the speed point of different parts
Cloth state, it is to avoid interference.Transparent pipe caliber will be in more than 50mm, and circular tube external wall must have length scale.
Each red ink syringe needle 6 can be opened individually by impulse valve independent control, can also be combined and be opened simultaneously, match somebody with somebody
Stopwatch is closed, the fluid flow state of each position of syringe needle 6 is observed.
According to syringe needle 6 to tube wall distance value from small to large, the impulse valve on each syringe needle 6 be followed successively by A valves, B valves,
C valves, D valves and E valves.
The utility model can realize following functions：
1st, observation red ink is in each valve (to the distance value of tube wall red ink impulse valve on ascending syringe needle 6
It is followed successively by A valves, B valves, C valves, D valves, E valves) flow regime in transparent round tube after outflow.
2nd, calculate each valve flow out red ink flowing velocity, equivalent to obtain pipe center, 3/4ths radiuses,
Water velocity at two/Radius, a quarter radius and close tube wall during laminar flow.
The utility model can carry out the demonstration of laminar condition and turbulence state, and job step is specific as follows.
1st, the first valve 8 is closed.
2nd, start compression pump 9, open the first valve 8 after the water surface in head tank 4 overflows across overflow baffle 3, flow should not surpass
Cross 150L/h, Open valve A, B, C, D, E.Observe the flow regime of the red ink of each syringe needle 6 outflow.Now fluid is in pipe
Low speeds flow, is rendered as laminar flow, and the red ink that each syringe needle 6 flows out makees smooth linear motion along the direction parallel with pipe axle.Stream
The flow velocity of body is maximum in pipe center, minimum at its nearly wall.
3rd, gradually increase the aperture of the first valve 8, increase flow, treat that the red ink that the corresponding syringe needles 6 of valve E flow out occurs
The wave state of very little, i.e., the flow velocity of recording flowmeter 7 when being no longer smooth linear.Observe each syringe needle 6 outflow red ink
Flow regime, now in addition to valve E, the red ink that other syringe needles 6 flow out is still smooth linear motion.Show that flow increases
When laminar flow because being started by disturbance to irregular turbulent transition.
4th, valve A, B, C, D, E are closed, so that the red ink in pipe is emptied, is easy to observe next stage experimental phenomena.
5 opening valve E start simultaneously at timing, when the distance that red ink flows through is 1000mm (having scale on transparent pipe),
Table is pinched, the time is recorded.Simultaneously close off valve E.Red ink valve A, B, C, the step of D is repeated in valve E.Recording flowmeter 7
Shown flow, the water velocity under the flow can be calculated respectively.
6th, Open valve A, B, C, D, continues to increase the aperture of the first valve 8, increases flow, the red ink flowed out until valve D
Untill water is changed into very little wave state from streamlined flow state.Observe the flow regime that each syringe needle 6 flows out red ink.
7th, valve A, B, C, D are closed.
8th, open valve D and start simultaneously at timing, treat that the distance that red ink flows through is 1000mm (having scale on transparent round tube)
When, table is pinched, the time is recorded.Simultaneously close off valve D.Red ink valve A, B, the step of C is repeated in valve D.(this experimentation
Valve E is closed always).The flow that recording flowmeter 7 is shown simultaneously.
9th, Open valve A, B, C, continues to increase the aperture of the first valve 8, increases flow, the red ink flowed out until valve C
Untill being changed into very little wave state from streamlined flow state.Observe the flow regime of each red ink.
10th, valve A, B, C are closed.
11st, open valve C and start simultaneously at timing, treat that the distance that red ink flows through is 1000mm (having scale on transparent pipe)
When, table is pinched, the time is recorded.Simultaneously close off valve C.Red ink valve A, the step of B is repeated in valve C.(this experimentation valve
Door D, E are closed always).The flow that recording flowmeter 7 is shown simultaneously.
12nd, Open valve A, B, continue increase the aperture of the first valve 8, increase flow, until valve B flow out red ink by
Untill streamlined flow state is changed into very little wave state.Observe the flow regime of each red ink.
13 close valve A, B.
14th, open valve B and start simultaneously at timing, treat that the distance that red ink flows through is 1000mm (having scale on transparent pipe)
When, table is pinched, the time is recorded.Simultaneously close off valve B.The step of red ink valve A repeats valve B.(this experimentation valve D, E,
C is closed always).The flow that recording flowmeter 7 is shown simultaneously.
15th, keep the flow of step 14 constant, open all red ink valves, observe the flow regime of red ink, present
Turbulence state, red ink movement disorder.
Claims (8)
1. fluid velocity distribution experiments instrument, it is characterised in that：Including the head tank (4) for filling fluid, the bottom of head tank (4)
The first valve (8) is set on the transparent pipe of connection, pipe；The porch of pipe is provided with several syringe needles (6), syringe needle (6)
Ink bottle (1) is all connected with, syringe needle (6) carries the second valve；The bottom of head tank (4) is connected by the first pipeline and the second pipeline
Circulating water chennel (10) is connect, circulation loop is formed；Compression pump (9) is installed on the first pipeline；The bottom of head tank (4) offers one
Water inlet and two delivery ports, water inlet are connected with the first pipeline, and delivery port is symmetrically opened in water inlet both sides；One of them goes out
Mouth of a river connecting circular tube, another delivery port connects the entrance of the second pipeline, and the outlet of the second pipeline is located in circulating water chennel (10)；
Overflow baffle (3) is provided between water inlet and two delivery ports.
2. fluid velocity distribution experiments instrument according to claim 1, it is characterised in that：Syringe needle (6) is five.
3. fluid velocity distribution experiments instrument according to claim 1 or 2, it is characterised in that：Syringe needle (6) is separately positioned on circle
At the center of pipe, 3/4ths radiuses, two/Radius, a quarter radius and tube wall.
4. fluid velocity distribution experiments instrument according to claim 1, it is characterised in that：Second valve is impulse valve.
5. fluid velocity distribution experiments instrument according to claim 1, it is characterised in that：Flowmeter is also equipped with pipe
(7)。
6. fluid velocity distribution experiments instrument according to claim 1, it is characterised in that：Overflow baffle (3) bottom surface and a high position
Permeable hole (5) is set in the middle of the position of groove (4) contact.
7. fluid velocity distribution experiments instrument according to claim 1, it is characterised in that：Ink bottle (1) is arranged on ink bottle
On support (2), ink bottle rack (2) is arranged on above head tank (4).
8. fluid velocity distribution experiments instrument according to claim 1, it is characterised in that：Length scale is provided with pipe,
Pipe caliber is in more than 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621293890.0U CN206516192U (en) | 2016-11-29 | 2016-11-29 | Fluid velocity distribution experiments instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621293890.0U CN206516192U (en) | 2016-11-29 | 2016-11-29 | Fluid velocity distribution experiments instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206516192U true CN206516192U (en) | 2017-09-22 |
Family
ID=59861940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621293890.0U Expired - Fee Related CN206516192U (en) | 2016-11-29 | 2016-11-29 | Fluid velocity distribution experiments instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206516192U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781901A (en) * | 2016-11-29 | 2017-05-31 | 榆林学院 | A kind of fluid velocity distribution experiments instrument and its application method |
| CN112435565A (en) * | 2020-11-23 | 2021-03-02 | 北京建筑大学 | Teaching demonstration device for hydraulic coupler of heating system |
-
2016
- 2016-11-29 CN CN201621293890.0U patent/CN206516192U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781901A (en) * | 2016-11-29 | 2017-05-31 | 榆林学院 | A kind of fluid velocity distribution experiments instrument and its application method |
| CN112435565A (en) * | 2020-11-23 | 2021-03-02 | 北京建筑大学 | Teaching demonstration device for hydraulic coupler of heating system |
| CN112435565B (en) * | 2020-11-23 | 2022-05-13 | 北京建筑大学 | Teaching demonstration device for hydraulic coupler of heating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170922 Termination date: 20181129 |