CN208400364U - A kind of reynolds experiment measurement pipe - Google Patents
A kind of reynolds experiment measurement pipe Download PDFInfo
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- CN208400364U CN208400364U CN201721871122.3U CN201721871122U CN208400364U CN 208400364 U CN208400364 U CN 208400364U CN 201721871122 U CN201721871122 U CN 201721871122U CN 208400364 U CN208400364 U CN 208400364U
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- measurement pipe
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Abstract
The utility model provides a kind of reynolds experiment measurement pipe.Its structure is: be provided on the central axis of transparent tube body axially through cylindrical cavity, one end of cylindrical cavity is input end, and the other end is outlet end, and flow media can be flowed into from the input end of cylindrical cavity, and from outlet end outflow；One is provided in the cylindrical cavity of tube body colo(u)r streak, and described one end for having colo(u)r streak is fixed on the center position of cylindrical cavity input end, and the other end is free end.It can determine the flow regime of medium according to the motion state for having colo(u)r streak.The utility model replaces colored liquid with there is colo(u)r streak, does not influence the flowing of medium, reusable, at low cost；And measurement pipe is detachable, may be mounted in practical pipeline and is tested, it is convenient and efficient；Further more, this measurement pipe not only can measure the flow regime of liquid, the flowing of gas phase media, blending agent can also be measured, is widely used, the unicity and limitation of existing equipment are overcome.
Description
Technical field
The utility model relates to experiment instrument in hydrodynamics, specifically a kind of reynolds experiment measurement pipe.
Background technique
Reynolds experiment is one of the important experiment in hydrodynamics, and its object is to judge to flow according to the state of colored liquid
Dynamic state, and then find the rule of linear loss under the factor and different flow regimes that influence flow regime.
In traditional reynolds experiment demonstrator, colored liquid is to flow into experimental channel by high-order fluid cartridge and hose,
Flow media is injected into experimental channel, in the operating conditions difference such as temperature, pressure, flow velocity and flow, the flowing of pipeline internal medium
State is different.The motion profile of each particle mutually disjoints in pipeline, and nowed forming becomes laminar flow；The track of each particle is bent
Rolling over the crisscross nowed forming without determining regularity becomes turbulent flow and turbulent flow.Therefore, nowed forming can determine by Reynolds number.
Existing reynolds experiment demonstrator can only individually demonstrate specific fluid, cannot be attached in practical pipeline, limitation is very big.
Utility model content
The purpose of this utility model is just to provide a kind of reynolds experiment measurement pipe, and the measurement pipe is easy to disassemble, can be used for
In practical pipeline, and it can be used to measure the flowing of different medium.
Purpose of the utility model is realized as follows: a kind of reynolds experiment measurement pipe, in the central axis of transparent tube body
Be provided on line axially through cylindrical cavity, one end of the cylindrical cavity is input end, and the other end is outlet end, flowing
Medium can be flowed into from the input end of cylindrical cavity, and be flowed out from outlet end；Being provided with one in the cylindrical cavity of tube body has
Colo(u)r streak, described one end for having colo(u)r streak are fixed on the center position of cylindrical cavity input end, and the other end for having colo(u)r streak is
Free end；It is described to have colo(u)r streak free extension in the cylindrical cavity of tube body；Flow media flows in the cylindrical cavity of tube body
When dynamic, there is colo(u)r streak different motion states can be presented with the flow regime of flow media, according to having colo(u)r streak in flow media
Interior motion state is that can determine the flow regime of flow media.
The input end cross-section of the tube body is provided with two default lines in right-angled intersection, the friendship of two default lines
Point is in the center position of cylindrical cavity input end, and described one end for having colo(u)r streak is bundled in the point of intersection of two default lines
On two default lines.
It is described to there is colo(u)r streak to be traditionally arranged to be bright-colored beautiful filament, it is specifically as follows red line, yellow line or green
Line etc..There is the length of colo(u)r streak to be not more than the length of cylindrical cavity.The diameter for having colo(u)r streak can be 0.2-0.5mm.
The internal diameter of the cylindrical cavity is 30-150mm, length 300-500mm.The outside of the tube body is cylindrical body
Structure or rectangular parallelepiped structure.Preferably, the outside that tube body can be set is rectangular parallelepiped structure, when the outside of tube body is cuboid knot
When structure, graduation mark can be set in the vertical side walls of rectangular parallelepiped structure, correspond to graduation mark in the free end for having colo(u)r streak,
If amplitude can be readily observed by graduation mark in this way, there is colo(u)r streak to vibrate with flow media.High speed can also be passed through
Video camera shoots the Vibration Condition of colo(u)r streak, can learn the vibration frequency and Oscillation Amplitude of colo(u)r streak.
The utility model is consolidated by opening cylindrical cavity on tube body, and in the input end center position of cylindrical cavity
Surely there is one end of colo(u)r streak, there is the other end of colo(u)r streak to protrude into cylindrical cavity naturally.When there is medium to flow into cylindrical cavity, have
Colo(u)r streak can follow the flow regime of medium to be moved.When flow regime difference, there is the state of colo(u)r streak also different, when laminar flow, has
Colo(u)r streak can exist in central axis with the state of straight line；There is colo(u)r streak that can vibrate up and down when turbulent, and has one in the axial direction
It is fixed flexible.It can determine the flow regime of medium according to the motion state for having colo(u)r streak.
The utility model has the following beneficial effects:
(1) reynolds experiment measurement pipe provided by the utility model, colored liquid is replaced with there is colo(u)r streak, does not influence to be situated between
The flowing of matter, it is reusable, it is at low cost；(2) measurement pipe is detachable, and may be mounted in practical pipeline and tested,
It is convenient and efficient；(4) this measurement pipe can not only measure the flow regime of liquid, can also measure gas phase media, blending agent
Flowing, is widely used, overcomes the unicity and limitation of existing equipment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the cross-sectional view of Fig. 1.
Fig. 3 is the Longitudinal cross section schematic of Fig. 1.
Specific embodiment
As shown in Fig. 1 ~ Fig. 3, the utility model has obtained one by carrying out structure design to original reynolds experiment demonstrator
The new measurement pipe easy to disassemble that can be used for reynolds experiment and can also be used for practical pipeline of kind, the specific structure of the measurement pipe is:
Along the central axis of transparent tube body 1 open axially through cylindrical cavity 2, one end of cylindrical cavity 2 is input end (in Fig. 3
Left end), the other end is outlet end (right end in Fig. 3)；Flow media to be measured can be flowed into from the input end of cylindrical cavity 2, and
It is flowed out from the outlet end of cylindrical cavity 2.The internal diameter of cylindrical cavity 2 can be 30-150mm, show in cylinder in Fig. 2
The internal diameter of chamber 2 is 50mm；Its length can be 300-500mm, and the length that cylindrical cavity 2 is shown in Fig. 3 is 400mm.Pipe
The outside of body 1 be can be cylindrical structure, or rectangular parallelepiped structure (see figure 1).When tube body 1 is rectangular parallelepiped structure,
Vertical graduation mark 4, end position of the graduation mark 4 generally proximate to tube body 1 can be set on the vertical lateral wall of rectangular parallelepiped structure
Set place.
Being provided with one in the cylindrical cavity 2 of tube body 1 has colo(u)r streak 3, and having colo(u)r streak 3 is bright-colored convenient in flow media
In the filament that is resolved out, such as can be red line, yellow line or green line etc., there is the diameter of colo(u)r streak 3 to be traditionally arranged to be
0.2-0.5mm.There is the length of colo(u)r streak 3 to be not more than the length of cylindrical cavity 2.There is one end of colo(u)r streak 3 to be fixed on cylindrical cavity 2
The center position of input end, specific fixed form is: being arranged two in the input end cross-section of tube body 1 and is mutually perpendicular to and hands over
The default line of fork, the intersection point of two default lines are in the center position of 2 input end of cylindrical cavity.For Fig. 2, tube body
1 cross section is square, and two default lines can be also possible to hang down in two pairs of opposite side respectively along two diagonals
Line.There is one end of colo(u)r streak 3 to be bundled on two default lines in the point of intersection of two default lines.There is the other end of colo(u)r streak 3 for freely
End, and there is the free extension in the cylindrical cavity 2 of tube body 1 of colo(u)r streak 3 to come.There is 3 free end position of colo(u)r streak to correspond to tube body 1
The position of lateral wall high scale line 4.When flow media flows in the cylindrical cavity 2 of tube body 1, there is colo(u)r streak 3 can be with stream
It moves the flow regime of medium and different motion states is presented.For flow media with laminar flow in the cylindrical cavity 2 of tube body 1
When state flows, there is colo(u)r streak 3 to be rendered as a horizontal straight line in the axis line location of cylindrical cavity 2 with the flowing of flow media
State；When flow media is flowed in the cylindrical cavity 2 of tube body 1 with Turbulent Flow, there is colo(u)r streak 3 with the flowing of flow media
There is certain vibration in the axis line location of cylindrical cavity 2, it may be assumed that show as the dither state of certain vibration frequency.Therefore,
According to the flow regime for thering is motion state of the colo(u)r streak 3 in flow media to can determine flow media.High-speed camera can be passed through
Shooting has the Vibration Condition of colo(u)r streak 3, in conjunction with graduation mark 4, it can be deduced that have the vibration frequency and Oscillation Amplitude of colo(u)r streak 3.
Measurement pipe in the utility model is installed in practical pipeline, both ends pass through rubber pad respectively and screw thick stick carries out
Step up to fix, checks whether cohesive end has leakage after fixed.After inspection, it can be operated.
By taking single phase gas as an example, practical operation is as follows: working condition being designed, reaches stable state, in observation tube body
The flow regime of flow media；Flow reading is carried out by the flow standard table on practical pipeline, is remembered further according to temperature sensor
Record the fluid temperature (F.T.) in practical pipeline.Fluid flow rate is calculated according to flow, temperature and internal diameter of the pipeline, flow relocity calculation formula is as follows:
(1)
Wherein, Q is the volume flow of fluid, the reading of flow standard table, unit m3/s；D is the internal diameter of practical pipeline,
Unit is m.
According to the viscosity of the temperature associated technical parameters meter fluid operator of fluid, the viscosity of fluid includes that the movement of fluid is viscous
The dynamic viscosity of degree and fluid.
The Reynolds number of fluid is calculated according to flow velocity, fluid viscosity, internal diameter of the pipeline, calculation formula is as follows:
(2)
In formula (2),vFor the kinematic viscosity of fluid, unit m2/s；ηFor the dynamic viscosity of fluid, unit Pas.
The flow regime that fluid is judged according to the Reynolds number calculated and in conjunction with critical Reynolds number, is judged with this
Flow regime the flow regime being observed visually is verified, as the result is shown according to the movement for having colo(u)r streak in the utility model
State and the media flow state of determination is completely correct.
Claims (7)
1. a kind of reynolds experiment measurement pipe, characterized in that be provided on the central axis of transparent tube body axially through cylinder
Shape inner cavity, one end of the cylindrical cavity are input end, the other end is outlet end, flow media can from cylindrical cavity into
Mouth end flows into, and flows out from outlet end；One is provided in the cylindrical cavity of tube body colo(u)r streak, and described one end for having colo(u)r streak is solid
It is scheduled on the center position of cylindrical cavity input end, the other end for having colo(u)r streak is free end；It is described to have colo(u)r streak in tube body
Cylindrical cavity in free extension；When flow media flows in the cylindrical cavity of tube body, there is colo(u)r streak that can be situated between with flowing
The flow regime of matter and different motion states is presented, according to there is motion state of the colo(u)r streak in flow media to can determine flowing
The flow regime of medium.
2. reynolds experiment measurement pipe according to claim 1, characterized in that in the input end cross-section of the tube body
Two default lines in right-angled intersection are provided with, the intersection point of two default lines is in the center of cylindrical cavity input end
Place, described one end for having colo(u)r streak is bundled on two default lines in the point of intersection of two default lines.
3. reynolds experiment measurement pipe according to claim 1, characterized in that described to have colo(u)r streak for red line, yellow line
Or green line.
4. reynolds experiment measurement pipe according to claim 1, characterized in that the length for having colo(u)r streak is no more than described
The length of cylindrical cavity.
5. reynolds experiment measurement pipe according to claim 1, characterized in that the diameter for having colo(u)r streak is 0.2-
0.5mm。
6. reynolds experiment measurement pipe according to claim 1, characterized in that the internal diameter of the cylindrical cavity is 30-
150mm, length 300-500mm.
7. reynolds experiment measurement pipe according to claim 1, characterized in that the outside of the tube body is cuboid knot
Structure is equipped with graduation mark, by described in the vertical side walls of the tube body at position corresponding with there is colo(u)r streak free end in tube body
The amplitude that graduation mark observable has colo(u)r streak to vibrate with flow media.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721871122.3U CN208400364U (en) | 2017-12-28 | 2017-12-28 | A kind of reynolds experiment measurement pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721871122.3U CN208400364U (en) | 2017-12-28 | 2017-12-28 | A kind of reynolds experiment measurement pipe |
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| CN208400364U true CN208400364U (en) | 2019-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822161A (en) * | 2022-05-13 | 2022-07-29 | 四川轻化工大学 | Method for researching liquid viscosity coefficient through image acquisition |
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2017
- 2017-12-28 CN CN201721871122.3U patent/CN208400364U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114822161A (en) * | 2022-05-13 | 2022-07-29 | 四川轻化工大学 | Method for researching liquid viscosity coefficient through image acquisition |
| CN114822161B (en) * | 2022-05-13 | 2023-10-10 | 四川轻化工大学 | Method for researching viscosity coefficient of liquid through image acquisition |
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