CN206961386U - A kind of reynolds test instrument - Google Patents
A kind of reynolds test instrument Download PDFInfo
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- CN206961386U CN206961386U CN201720425330.4U CN201720425330U CN206961386U CN 206961386 U CN206961386 U CN 206961386U CN 201720425330 U CN201720425330 U CN 201720425330U CN 206961386 U CN206961386 U CN 206961386U
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Abstract
A kind of reynolds test instrument is the utility model is related to, it includes water temperature regulator control system, experiment commutation system, experimental demonstration system and water circulation system.The technical problems to be solved in the utility model is, the flow rate of water flow mode in pipe that changes is fully relied on for existing reynolds test instrument and adjusts Reynolds number, in the critical stage that current convert from laminar flow to turbulent flow or turbulent flow converts to laminar flow, there is provided it is a kind of change the reynolds test instrument of Reynolds number by changing water temperature, weaken influence of the turbulent water to experimental result caused by adjustment flow velocity.
Description
Technical field
A kind of new Reynolds experiment device is the utility model is related to, belongs to hydraulic experiment instrument field.
Background technology
Reynolds experiment has critical role in the development history of hydraulics, be hydraulics beginner understand current laminar flow and
Turbulent two kinds of fluidised forms and its transition and the important experiment of transformation rule, therefore Reynolds test instrument is that kind must not in hydraulics teaching
The experiment device for teaching that can lack.
When the timing of caliber one, with the change of flow velocity, different fluidised forms are may occur in which in pipe, typically by calculating pipe Reynolds
Count to differentiate flow-shape.Reynolds test instrument is exactly based on the Reynolds number demonstration current for changing current in pipe in different Reynolds number
Under motion state and its between laminar flow and turbulent flow mutual conversion process instructional device.
Current, in Reynolds test instrument the change of Reynolds number mainly reach experiment purpose by changing in pipe flow velocity,
The change of flow velocity realizes often through regulation flow, but in practical operation, turbulent water meeting caused by being adjusted due to flow velocity
Directly affect the crucial rank that the result and precision of experiment, particularly current convert from laminar flow to turbulent flow or turbulent flow converts to laminar flow
Section, the experiment law unobvious of observation, the obtained critical Reynolds number of experiment and unstable is repeated several times, and deviation is larger, for
It is even more so for two kinds of fluidised forms of current and its unfamiliar operator of transforming relationship, or even the teaching effect of experiment can be influenceed
The cognition of fruit and student to Reynolds number.
Therefore the new experimental provision of utility model, reduce influence of the experiment critical stage changes in flow rate to experimental precision, carry
The teaching efficiency of height experiment necessitates.
Utility model content
The technical problems to be solved in the utility model is, is fully relied on for existing reynolds test instrument and changes pipe reclaimed water
Stream flow velocity mode adjusts Reynolds number, in the critical stage that current convert from laminar flow to turbulent flow or turbulent flow converts to laminar flow, there is provided one
Kind changes the reynolds test instrument of Reynolds number by changing water temperature, weakens turbulent water caused by adjustment flow velocity to experimental result
Influence.
In order to solve the above-mentioned technical problem, the utility model proposes following technical scheme：A kind of reynolds test instrument, it includes
Water temperature regulator control system, experiment commutation system, experimental demonstration system and water circulation system；
The water temperature regulator control system is made up of hot-water heating system module, chilled water system module and water mixing system module, institute
Stating hot-water heating system module includes heating system and hot water storage and thermal insulation case, and the heating system is connected with hot water storage and thermal insulation case；It is described
Chilled water system module includes refrigeration system and cold water storage and thermal insulation case, and the refrigeration system is connected with cold water storage and thermal insulation case；The water
Body hybrid system module includes water mixing valve, and suction pump is provided with the water mixing valve outlet conduit, stream is provided with after suction pump
Adjuster is measured, water temperature control device is installed on the suction pump；
The experiment commutation system includes rectifier box, and polylith cowling panel is internally provided with rectifier box；
The experimental demonstration system includes tracer storage box, and the bottom of the tracer storage box is provided with tracer and led
Flow tube, tracer control valve is provided with the tracer mozzle, and the other end of the tracer mozzle is connected saturating
On bright heat insulation glass pipeline section, control valve is installed on transparent heat-insulation glass pipeline section；
The water circulation system includes tail water water tank, and the tail water water tank is being located at the end of transparent heat-insulation glass pipeline section just
Lower section, sensitive thermometer is internally provided with tail water water tank, the bottom of tail water water tank is communicated with circulation pipe, on the circulation pipe according to
Secondary to be provided with the first control valve, suction pump, shunt valve and the second control valve, the water side of the circulation pipe is provided with water tank.
The water mixing valve uses constant-temperature water mixing valve, can maintain the leaving water temperature of setting automatically in a small range.
The outer wrap of the hot water storage and thermal insulation case and cold water storage and thermal insulation case has insulation material.
It is flexibly connected between the rectifier box and flow regulator using flexible pipe；Set two pieces of parallel uprights whole in rectifier box
Flowing plate.
The transparent heat-insulation glass pipeline section uses transparent glass tube containing insulating layer.
The 3rd control valve is provided with the water inlet pipe of the heating system.
The 4th control valve is provided with the water inlet pipe of the refrigeration system.
A kind of improvement reynolds test instrument provided by the utility model, its advantage exists compared with traditional reynolds test instrument
In：
Using the change of water temperature, adjustment water sports viscosity coefficient replaces adjusting pipe flow velocity then by the change of flow
Change the purpose of Reynolds number between laminar flow and turbulent flow, being effectively reduced turbulent water influences, improves experimental precision.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is reynolds test instrument construction unit figure.
Fig. 2 is overall water circulation system schematic diagram.
In figure：Heating system 1, hot water storage and thermal insulation case 2, refrigeration system 3, cold water storage and thermal insulation case 4, water mixing valve 5, water temperature control
Device 6, tracer storage box 7, tracer control valve 8, tracer mozzle 9, rectifier box 10, transparent heat-insulation glass pipeline section
11st, flow regulator 12, tail water water tank 13, the first control valve 14, suction pump 15, shunt valve 16, circulation pipe 17, control valve
18th, sensitive thermometer 19, flexible pipe 20, cowling panel 21, water tank 22, the 4th control valve 23, the 3rd control valve 24.
Embodiment
Embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
Embodiment 1：
Such as Fig. 1, a kind of new reynolds test instrument, include water temperature regulator control system, experiment commutation system, experimental demonstration system
And water circulation system composition.Particularly water temperature regulator control system, the mesh of adjustment Reynolds number is reached for changing experiment water temperature
's；The water temperature regulator control system includes hot-water heating system module, chilled water system module, water mixing system module composition.
Wherein, the hot-water heating system module, including heating system 1, hot water storage and thermal insulation case 2, heating system 1 are protected with hot water storage
Connected between incubator 2 with inside plastic round tube, water is heated up first with heating system 1, is then stored in hot water storage
Incubator 2, ensure enough stable hot water supplies；The chilled water system module, including refrigeration system 3, cold water storage and thermal insulation case 4, system
Connected with inside plastic round tube between cooling system 3 and cold water storage and thermal insulation case 4, water cooled first with refrigeration system 3,
Cold water storage and thermal insulation case 4 is then stored in, when experiment does not need special refrigeration, i.e., when demonstration Reynolds number fluctuation range amplitude is smaller,
Extraneous normal-temperature water can be used directly.Extraneous normal temperature water system water body separately flows into heating system 1, refrigeration system by plastic round tube
3；Heated system 1 or refrigeration system 3 are not opened, separately flow into hot water storage and thermal insulation case 2, cold water storage and thermal insulation case 4.
Further, the water mixing system module, by water mixing valve 5, flow regulator 12, suction pump 15 and water temperature control
Device 6 processed forms.Water mixing valve 5 connects hot water storage and thermal insulation case 2 and cold water storage and thermal insulation case 4, water temperature control device 6 by circulation pipe 17
For setting water mixing valve to conflux temperature, by hot water and cold water mix into required water temperature；Suction pump 15 provides hydraulic pressure, flow regulator
12 control waters.
In addition, the experiment commutation system, is made up of rectifier box 10, cowling panel 21.The positioned inside of rectifier box 10 has two pieces
The parallel cowling panel 21 stood up, smooth current provide stable constant water environment；Pay special attention to rectifier box 10 with top flow
It is flexibly connected between adjuster 12 using flexible pipe 20, that is, ensures that experiment rectification demo system is independently stable, the stability of rectifier box 10
Do not disturbed by the vibrations of other connection equipment.
Further, the experimental demonstration system, by tracer storage box 7, tracer mozzle 9, tracer regulating valve
Door 8, transparent heat-insulation glass pipeline section 11 and control valve 18 form.Tracer storage box 7, tracer mozzle 9 are placed in transparent
On heat insulation glass pipeline section 11, transparent heat-insulation glass pipeline section 11 goes out to take bell mouth shape to be connected with the connector of rectifier box 10；Transparent guarantor
Warm glass pipeline section 11 needs to reach thermal requirements, is easy to experimental phenomena observation simultaneously, reduces water body thermal loss.
Further, the water circulation system, by tail water water tank 13, sensitive thermometer 19, suction pump 15 and shunt valve
16 compositions.Connected between tail tank 13 and suction pump 15 with circulation pipe 17, the first control valve 14, suction pump are set among pipeline
Shunt valve 16 is connected to circulation pipe 17, during single reynolds experiment system lecture experiment, in the absence of the outer of whole laboratory afterwards
Boundary's hot water cyclesystem, now the one end of shunt valve 16 connect heating system 1 with plastic tube, other end connection is water tank 22, water
Case 22 stores unnecessary tail water；When carrying out the common lecture experiment of multiple reynolds experiment systems, the one end of shunt valve 16 is connected with plastic tube
The heating system 1 of this TV station reynolds test instrument, the other end connection be whole laboratory extraneous hot water cyclesystem, extraneous hot water
The circulatory system is directly communicated to the water inlet pipe of the heating system 1 of next reynolds test instrument with plastic round tube.Water circulation system
Middle tail tank 13 collects experiment tail water, when the inner storing water of tail tank 13 reaches a certain amount of, opens shunt valve 16 and connects hot-water heating system
End, tail water is pumped in the hot water cyclesystem of experiment water using suction pump 15, handled again using heating system 1, it is complete
Into hot water circuit, the other end of shunt valve 16 handles unnecessary tail water depending on the connection of single or multiple experimental systems respectively.In addition, tail
One sensitive thermometer 19 is set in water tank, experiment water flow temperature checked, experimental temperature takes water mixing valve to set temperature and tail
Both water monitoring temperature average values.
Embodiment 2：
It is the construction unit figure of the utility model reynolds test instrument as shown in Figure 1, the reynolds test instrument regulates and controls including water temperature
System, experiment commutation system, experimental demonstration system and water circulation system.Water temperature regulator control system includes heating system 1, hot water storage
The hot-water heating system module that incubator 2 is formed；The chilled water system module that refrigeration system 3, cold water storage and thermal insulation case 4 are formed；Water mixing valve 5,
The water mixing system module that flow regulator 12, suction pump 15 and water temperature control device 6 are formed.Wherein hot water storage, cold water storage
Incubator is all size 100 × 60 × 80cm seal thermal-insulation boxes, and water mixing valve is temperature sensitive constant-temperature water mixing valve.
Testing commutation system includes rectifier box 10, cowling panel 21；Wherein rectifier box 10 is using 100 × 30 × 60cm sizes
Safety glass is made, two pieces parallel of cowling panel of interval 30cm setting opposition in rectifier box, rectification 5 × 30 × 60cm of board size,
It is flexibly connected between rectifier box 10 and flow regulator 12 with diameter 30mm flexible pipes.
Experimental demonstration system is by tracer storage box 7, tracer mozzle 9, tracer control valve 8, transparent heat-insulation glass
Glass pipeline section 11 and control valve 18 form；It is potassium permanganate tracer wherein in tracer storage box unit 7, tracer mozzle
9 ends are located on the center line of transparent heat-insulation glass pipeline section 11, and apart from the exit 20cm of rectifier box 10；Rectifier box 10 and transparent guarantor
Bell mouth shape interface is used between warm glass pipeline section 11, transparent heat-insulation glass pipeline section 11 uses Double-layered transparent hollow heat-insulating glass
Pipe, length 100cm, external diameter 35mm, internal diameter 30mm.Water circulation system is by tail water water tank 13, the first control valve 14, suction pump
15 and shunt valve 16 form.
Embodiment 3：
As shown in Fig. 2 reynolds test instrument experiment flow of the present utility model is demonstrated with overall water circulation system schematic diagram.Beat
Drive the control valve 23 of the mouth of a river the 4th and the 3rd control valve 24 into, connect extraneous chilled water system and chilled water system module, hot-water heating system mould
Block, making water, heated system 1, refrigeration system 3 are stored in corresponding hot water storage and thermal insulation case, cold water storage and thermal insulation case respectively；In mixed water
In system module, regulation water temperature control device 6 sets temperature, and hot water storage, cold water storage are mixed into thermostatted water using water mixing valve, leads to
Cross suction pump 15 and be pumped to experiment rectification demonstration module；In experiment module, the specified temp water and tracer of rectified case rectification
Converge, flow through transparent heat-insulation glass pipeline section 11, come together in tail tank 13；The timing of tail tank water one is treated, opens suction pump 15,
The experiment water pump of tail water collection module is delivered in hot-water heating system module and recycled, if more reynolds test instruments are drilled jointly
Show, also can adjust shunt valve 16, open control of export valve 25, divide water to enter water tank 22.
Test the first stage, Reynolds number lecture experiment from low to high.Control the flow regulator 12 in turbid water system module
Adjust flow, crack tracer valve, it can be seen that a thin AC line is presented in the colored liquid in pipe, and it is layer to illustrate this fluidised form
Stream；Gradually slowly open big flow adjuster valve, the ascending pipe flow velocity for corresponding to the determination of Reynolds number 1800 ± 200 of flow
When stop adjustment, keep present flow rate adjuster 12 to adjust and set；Start the setting temperature of progressively adjustment water temperature control device 6,
It is observed that coloured straight line starts to pulse in glass tube, but fluid particle is also not up to exchanged with each other degree, now, i.e.,
Start the upper critical condition of conversion for fluid flow state, write down experimental temperature this moment, current can be solved from laminar flow to disorderly
The actual Reynolds number of circulationization；Continue the setting temperature of slowly adjustment water temperature control device 6, it is observed that coloured straight line is complete
Disorder, water body fluidised form enter the turbulent stage, continue to adjust the water that water temperature control device 6 corresponds to the determination of Reynolds number 3000 ± 200
Stop adjustment during temperature；The flow regulator 12 in turbid water system module is readjusted, tunes up flow.
Test second stage, Reynolds number lecture experiment from high to low.Control the flow regulator 12 in turbid water system module
Flow is adjusted, flow is descending to stop adjustment when corresponding to the pipe flow velocity of the determination of Reynolds number 3000 ± 200, keeps current stream
The regulation of adjuster 12 is measured to set；Start the setting temperature of adjustment water temperature control device 6, it was observed that current convert from turbulent flow to laminar flow
Experimental phenomena, write down experimental temperature this moment, the actual Reynolds number that current convert from turbulent flow to laminar flow can be solved；Continue to adjust
The setting temperature of whole water temperature control device 6, thin straight colo(u)r streak can be occurred again by testing in glass tube, fluid flow state is changed into laminar flow；
Stop adjustment when corresponding to the water temperature that Reynolds number 1800 ± 200 calculates, readjust the flow in turbid water system module
Adjuster 12, turn flow down, prepare experiment next time.
By above-mentioned description, those skilled in the art completely can be without departing from this item utility model technological thought
In the range of, various changes and amendments are carried out all within the scope of protection of the utility model.It is of the present utility model not most
Matters, belong to the common knowledge of those skilled in the art.
Claims (7)
- A kind of 1. reynolds test instrument, it is characterised in that：It includes water temperature regulator control system, experiment commutation system, experimental demonstration system And water circulation system；The water temperature regulator control system is made up of hot-water heating system module, chilled water system module and water mixing system module, the heat Water system module includes heating system（1）With hot water storage and thermal insulation case（2）, the heating system（1）With hot water storage and thermal insulation case（2）Phase Even；The chilled water system module includes refrigeration system（3）With cold water storage and thermal insulation case（4）, the refrigeration system（3）Protected with cold water storage Incubator（4）It is connected；The water mixing system module includes water mixing valve（5）, the water mixing valve（5）It is provided with and takes out on outlet conduit Water pump（15）, suction pump（15）Flow regulator is installed afterwards（12）, the suction pump（15）On be provided with water temperature control dress Put（6）；The experiment commutation system includes rectifier box（10）, in rectifier box（10）It is internally provided with polylith cowling panel（21）；The experimental demonstration system includes tracer storage box（7）, the tracer storage box（7）Bottom tracer is installed Mozzle（9）, the tracer mozzle（9）On tracer control valve is installed（8）, the tracer mozzle（9）'s The other end is connected in transparent heat-insulation glass pipeline section（11）On, in transparent heat-insulation glass pipeline section（11）On control valve is installed （18）；The water circulation system includes tail water water tank（13）, the tail water water tank（13）Positioned at transparent heat-insulation glass pipeline section（11） End immediately below, in tail water water tank（13）It is internally provided with sensitive thermometer（19）, tail water water tank（13）Bottom be communicated with Circulation pipe（17）, the circulation pipe（17）On be sequentially installed with the first control valve（14）, suction pump, shunt valve（16）With the second control Valve processed（25）, the circulation pipe（17）Water side be provided with water tank（22）.
- A kind of 2. reynolds test instrument according to claim 1, it is characterised in that：The water mixing valve（5）Using constant temperature water mixing Valve, the leaving water temperature of setting can be maintained automatically in a small range.
- A kind of 3. reynolds test instrument according to claim 1, it is characterised in that：The hot water storage and thermal insulation case（2）With cold storage Water incubator（4）Outer wrap have insulation material.
- A kind of 4. reynolds test instrument according to claim 1, it is characterised in that：The rectifier box（10）With flow regulator （12）Between use flexible pipe（20）Flexible connection；Two pieces of parallel upright cowling panels are set in rectifier box（21）.
- A kind of 5. reynolds test instrument according to claim 1, it is characterised in that：The transparent heat-insulation glass pipeline section（11）Adopt With transparent glass tube containing insulating layer.
- A kind of 6. reynolds test instrument according to claim 1, it is characterised in that：The heating system（1）Water inlet pipe on It is provided with the 3rd control valve（24）.
- A kind of 7. reynolds test instrument according to claim 1, it is characterised in that：The refrigeration system（3）Water inlet pipe on It is provided with the 4th control valve（23）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720425330.4U CN206961386U (en) | 2017-04-21 | 2017-04-21 | A kind of reynolds test instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720425330.4U CN206961386U (en) | 2017-04-21 | 2017-04-21 | A kind of reynolds test instrument |
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| CN206961386U true CN206961386U (en) | 2018-02-02 |
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| CN201720425330.4U Expired - Fee Related CN206961386U (en) | 2017-04-21 | 2017-04-21 | A kind of reynolds test instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920439A (en) * | 2017-04-21 | 2017-07-04 | 三峡大学 | A kind of reynolds test instrument and experimental technique |
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2017
- 2017-04-21 CN CN201720425330.4U patent/CN206961386U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920439A (en) * | 2017-04-21 | 2017-07-04 | 三峡大学 | A kind of reynolds test instrument and experimental technique |
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| Date | Code | Title | Description |
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| 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: 20180202 Termination date: 20210421 |