CN109506882A - The experimental provision and method that a kind of slip boundary condition density current and salt wedge generate - Google Patents
The experimental provision and method that a kind of slip boundary condition density current and salt wedge generate Download PDFInfo
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- CN109506882A CN109506882A CN201811399452.6A CN201811399452A CN109506882A CN 109506882 A CN109506882 A CN 109506882A CN 201811399452 A CN201811399452 A CN 201811399452A CN 109506882 A CN109506882 A CN 109506882A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
The invention discloses experimental provisions that a kind of slip boundary condition density current and salt wedge generate, including experimental trough, transmission bottom, fixed bottom, water guide case, low-density water body water tank, high density water body water tank, detachable fairing, guiding device, inlet tank, external drainage tube, water level baffle, water outlet, graduated scale, cross calibration line, control valve, flowmeter, filter, small pump, blender etc..The experiment that apparatus of the present invention can be carried out includes that slip boundary condition density current is tested, salt wedge generates experiment, conventional persistence becomes a mandarin, and density current is tested.It can eliminate the lobe-and-cleft phenomenon of the head zone of density current diffusion process, to which three-dimensional motion is reduced to two dimensional motion, convenient for the analysis of phenomenon mechanism, while experiment basis also is made for complicated three dimensional analysis, while salt wedge operating condition is just switchable to by shirtsleeve operation.Component composition flexible design of the present invention, applicable operating condition are extensive.
Description
Technical field
The present invention relates to hydraulic engineering hydraulic model test fields, and in particular to a kind of slip boundary condition density current and
The experimental provision and method that salt wedge generates.
Background technique
Density current, also known as density current stream, density current are often referred to two kinds of different fluids of density, are produced due to density variation
Raw relative motion.There are many reason of causing fluid density difference, such as fluid temperature (F.T.) difference, the lyotrope containing higher concentration
Density variation caused by matter (salt, sugar etc.) or suspended material (mud, sand etc.) etc..Density flow phenomenon is in nature and Practical Project
In all widely exist, 30 or 40 years in last century generation rise, density current is gradually concerned, and the scholar of different subjects has carried out phase respectively
Research work is closed, such as in hydrodynamics, meteorology, geology, Environmental Engineering, hydraulic engineering.
In the patent formula announced, have been given both at home and abroad it is a variety of open a sluice gate formula and persistently enter streaming density current test dress
The technical solution set；Because density current diffusion process will form distinct head zone and tail region, but its head be with
Environment liquid blends the main region of (lobe-and-cleft and K-H billows phenomenon), shows three complicated maintenance and operations
Dynamic form, so that the data processing and phenomenon analysis to experiment bring difficulty；Simultaneously in existing model test design, rarely has consideration
The experimental provision that salt wedge generates.
Summary of the invention
The present invention overcomes deficiency in the prior art, a kind of slip boundary condition density current and salt wedge are provided
Generate experimental provision and method.
Device in the present invention include experimental trough, transmission bottom, fixed bottom, water guide case, low-density water body water tank,
High density water body water tank, detachable fairing, guiding device, inlet tank, water level baffle, water outlet, flowmeter and filtering
Device.
The low-density water body water tank is connect by the first small pump and the first valve with guiding device, described to lead
Device is flowed to be arranged in water guide case；Detachable fairing, detachable fairing are provided between water guide case and experimental trough
Lower section be located at one end of transmission bottom, transmit fixed bottom one end of another termination of bottom；Transmit bottom, the fixed equal position of bottom
In in experimental trough.
The high density water body water tank successively after the second small pump, filter, the second valve, flowmeter with
The bottom of inlet tank connects, and the other end of fixed bottom is located in inlet tank, and water level baffle, water level are equipped with above inlet tank
Water outlet, the inlet tank and experimental trough connection are connected to after baffle.
Furtherly, the experimental trough is equipped with graduated scale, the experiment close to the detachable fairing side
The side and top of sink are provided with high-speed camera, are additionally provided with cross calibration line above the experimental trough.
Furtherly, the water guide case, the inlet tank and the low-density water body the bottom of storage tank are all provided with
There is drainage arrangement.
Furtherly, the transmission speed of the transmission bottom is adjustable.
Furtherly, replaceable blender is installed in the high density water body water tank.
Furtherly, the experimental trough, water guide case, low-density water body water tank, high density water body water tank, water inlet
Tank wall face uses acrylic board.
Furtherly, the central axis of the blender is connect using dismountable axis piece connection ring, blade end with blade
It is pasted with thickening vanes plate, increases blade local stiffness.
Furtherly, the inlet tank bottom is connect by third valve with high density water body water tank.
A kind of generation method of salt wedge, specifically: opening and adjusting conveying belt makes transmission bottom possess constant speed, open
Open water pump, high density water body enters fixed bottom after importing inlet tank from high density water body water tank, low-density water body is from low close
Spend water body water tank and import water guide case, fairing is guided to by guiding device, and then enter transmission bottom, and with transmission
The identical speed of bottom finally forms slip boundary condition to fixed bottom flowing on the fixation bottom close to transmission bottom
Density current head zone.
A kind of slip boundary condition density current experimental method, specifically: being not turned on conveyer belt, the relatively fixed bottom of transmission bottom
Bed speed is 0, opens water pump, high density water body enters fixed bottom after importing inlet tank from high density water body water tank, low close
It spends water body and imports water guide case from low-density water body water tank, fairing is guided to by guiding device, and then enter transmission bottom
Bed finally forms salt wedge on the fixation bottom close to transmission bottom.
Beneficial effects of the present invention:
1, apparatus of the present invention are highly reliable, and structure is simple, good integrity, and device design, production cost are small, and experimentation cost is cheap；
Test process is simple and convenient, and test efficiency is high.
2, the experiment that apparatus of the present invention can be carried out include slip boundary condition density current experiment, salt wedge generate experiment,
Conventional persistence become a mandarin density current experiment.
3, apparatus of the present invention can eliminate the lobe-and-cleft phenomenon (head of the head zone of density current diffusion process
Base slope diffusion is close in region, is not in that phenomenon is raised on traditional head, to eliminate the phenomenon), thus by three-dimensional motion
It is reduced to two dimensional motion, convenient for the analysis of phenomenon mechanism, while also making experiment basis, structure of the present invention for complicated three dimensional analysis
Part Combination Design is flexible, and applicable operating condition is extensive, highly reliable.
4, apparatus of the present invention use the real-time packing density stream motion process of high-speed camera, and test accuracy is high, and numerical value obtains
Strong real-time, test process operation are succinct convenient.
5, the test process illustrative of the method for the present invention and operability are obvious, and in combination with Particle Image Velocimetry
Technological means such as (Particle Image Velocimetry, PIV) carry out fining hydrodynamic course test, in conjunction with the present apparatus
Experimental design expansibility it is significant.
In conclusion the design of this experimental rig idea is unique novel, load cases combination multiplicity, structure is simple, good integrity, can
It is strong by property；Flexible design, it is particularly possible to simulate the slip boundary condition of density current head zone, that is, frictionless flow；It is logical
Crossing closing for simple conveyer belt can be also a big characteristic of the invention Operating condition adjustment to salt wedge experiment；Using high speed
The real-time packing density stream motion process of video camera, data acquisition strong real-time, test accuracy are high；The succinct side of this test process operation
Just, there is the advantages that test process efficiency height, experimental design strong flexibility, referentiability is significant.
Detailed description of the invention
Fig. 1 is schematic front view of the invention.
Fig. 2 is schematic top plan view of the invention.
In figure: 1. transmission bottoms, 2. fixed bottoms, 3. experimental troughs, 4. water level baffles, 5. water outlets, the calibration of 6. crosses
Line, 7. graduated scales, 8. detachable rectifiers, 9. guiding devices, 10. water guide casees, 11. inlet tanks, 12. drainage arrangements, outside 13.
Drainage tube, 14. flowmeters, 15. control valves, 16. control valves, 17 control valves, 18. filters, 19. small pumps, 20.
Small pump, 21. low-density water body water tanks, 22. high density water body water tanks, 23. drainage arrangements, 24. drainage arrangements, 25.
Blender.
Specific embodiment
In the description of the present invention, it is to be understood that, term " top ", "vertical", " bottom ", "inner", " side ", " hang down
Directly ", the orientation or positional relationship of the instructions such as "upper", "lower", " upper end ", "lower", " rear ", " height ", " preceding " is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to of the invention
Limitation.
In the present invention unless specifically defined or limited otherwise, the terms such as term " setting ", " connection " should do broad sense
Understand, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection, be also possible to
Electrical connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the invention of this reality unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " may be used
To be that the first and second features directly contact or the first and second features pass through intermediary mediate contact.
The present invention adopts the following technical scheme:
A kind of generation experimental provision of slip boundary condition density current and salt wedge, including it is experimental trough 3, transmission bottom 1, solid
Determine bottom 2, water guide case 10, low-density water body water tank 21, high density water body water tank 22, detachable fairing 8, water conservancy diversion dress
Set 9, inlet tank 11, external drainage tube 13.
The experimental trough is equipped with graduated scale 7, the side of the experimental trough close to the detachable fairing side
Face and top are provided with high-speed camera, and the experimental trough is equipped with water level baffle above the fixation bottom
4, it is connected to water outlet 5 after water level baffle, is equipped with cross calibration line 6 above the experimental trough side.
The water guide case and the inlet tank and the low-density water body the bottom of storage tank are equipped with draining dress
Set 12,23,24.
The transmission speed of the transmission bottom is adjustable.
Replaceable blender 25 is installed in the high density water body water tank.
The experimental trough, water guide case, low-density water body water tank, high density water body water tank, inlet tank wall surface are adopted
Use acrylic board.
Furtherly, the central axis of the blender is connect using dismountable axis piece connection ring, blade end with blade
It is pasted with thickening vanes plate, increases blade local stiffness.
Furtherly, the external drainage tube is equipped with control valve 15,16, flowmeter 14, small pump 19, filter
18。
The generation experimental method of slip boundary condition density current and salt wedge, using above-mentioned experimental rig, including sliding
Density current experiment that the experiment of boundary condition density current, salt wedge generate experiment, conventional persistence becomes a mandarin:
The slip boundary condition density current experimentation are as follows:
A. preparation process
Valve 12,16,23,24, Open valve 15,17 are closed, high density water body water tank 22 is equipped with high density water body, low-density
Water body water tank 21 is equipped with low-density water body.
B. experimentation
It opens and adjusting conveying belt makes transmission bottom 1 possess constant speed, open small pump 19,20, high density water body imports
Enter fixed bottom 2 behind 11 part of inlet tank, low-density water body imports water guide case 10, is guided to rectification dress by guiding device 9
8 are set, and then enters transmission bottom 1, and is flowed to the right with speed identical with transmission bottom 1, finally close to transmission 1 tail of bottom
The density current head zone of slip boundary condition is formed on the fixation bottom 2 at end.In addition, Open valve 16 can realize high density water
The recycling of body.
C. experiment terminates
Empty experimental trough part by opening and closing related valve, Dishwasher arranges relevant apparatus.
The salt wedge generates experimentation are as follows:
A. preparation process
Valve 12,16,23,24, Open valve 15,17 are closed, high density water body water tank 22 is equipped with high density water body, low-density
Water body water tank 21 is equipped with low-density water body.
B. experimentation
It is not turned on conveyer belt, the relatively fixed bottom speed of transmission bottom is 0, opens small pump 19,20, high density water body imports
Enter fixed bottom 2 behind 11 part of inlet tank, low-density water body imports water guide case 10, is guided to rectification dress by guiding device 9
8 are set, and then enters transmission bottom 1, finally forms salt wedge on the fixation bottom 2 close to transmission 1 tail end of bottom.In addition, opening
The recycling of high density water body can be realized by opening valve 16.
C. experiment terminates
Empty experimental trough part by opening and closing related valve, Dishwasher arranges relevant apparatus.
The traditional density stream generates experimentation are as follows:
A. preparation process
Valve 12,16,23,24 is closed, high density water body water tank 22 is equipped with high density water body, and low-density water body water tank 21 fills
There is low-density water body.
B. experimentation
Small pump 20, Open valve 17 are opened, low-density water body imports water guide case 10, is guided to rectification by guiding device 9
Device 8, and then enter transmission bottom 1, so that experimental trough part is filled the low-density water body of constant head, closes rectification dress later
Set 8.It is not turned on conveyer belt, the relatively fixed bottom speed of transmission bottom is 0.Small pump 19 is opened, Open valve 15 is highly dense
Degree water body ultimately forms traditional density current experiment that persistently becomes a mandarin into fixed bottom after importing 11 part of inlet tank.Open valve
16 can realize the recycling of high density water body.
C. experiment terminates
Empty experimental trough part by opening and closing related valve, Dishwasher arranges relevant apparatus.
In conclusion the experiment that apparatus of the present invention can be carried out includes the experiment of slip boundary condition density current, salt wedge life
At experiment, conventional persistence become a mandarin density current experiment.The test device systematic structure is simple, easy to operate；Density current expansion can be eliminated
The lobe-and-cleft phenomenon of the head zone for the process of dissipating is convenient for phenomenon machine so that three-dimensional motion is reduced to two dimensional motion
The analysis of reason, while also experiment basis is made for complicated three dimensional analysis；The device can also simulate the generation of salt wedge simultaneously
And carry out the experiment of traditional density stream.It is compensated in previous traditional density stream test by the test device systematic and simulates density
The unicity of stream type is successfully realized the simulation to different type density current, and can improve and analyze and research density current
Reliability, accuracy and science.
The foregoing is merely the preferred embodiments of invention in progress by the present invention, are not intended to limit patent model of the invention
It encloses, it is all using equivalent structure transformation made by present specification, it is directly or indirectly related with other are attached to
The technical field of product is included in scope of patent protection of the invention.
Claims (10)
1. the experimental provision that a kind of slip boundary condition density current and salt wedge generate, including experimental trough (3), transmission bottom
(1), fixed bottom (2), water guide case (10), low-density water body water tank (21), high density water body water tank (22), detachable whole
Flow device (8), guiding device (9), inlet tank (11), water level baffle (4), water outlet (5), flowmeter (14) and filter
(18)；
The low-density water body water tank (21) passes through the first small pump (20) and the first valve (17) and guiding device (9)
Connection, guiding device (9) setting is in water guide case (10)；It is provided between water guide case (10) and experimental trough (3) removable
It unloads fairing (8), the lower section of detachable fairing (8) is located at one end of transmission bottom (1), transmits the another of bottom (1)
Terminate fixed bottom (2) one end；Transmission bottom (1), fixed bottom (2) are respectively positioned in experimental trough (3)；
The high density water body water tank (22) successively passes through the second small pump (19), filter (18), the second valve
(15), flowmeter (14) is connect with the bottom of inlet tank (11) afterwards, and the other end of fixed bottom (2) is located in inlet tank (11),
It is equipped with water level baffle (4), is connected to after water level baffle (4) water outlet (5) above inlet tank (11), the inlet tank (11)
With experimental trough (3) connection.
2. the experimental provision that a kind of slip boundary condition density current according to claim 1 and salt wedge generate, special
Sign is: the experimental trough (3) is equipped with graduated scale (7) close to detachable fairing (8) side, the experiment water
The side and top of slot (3) are provided with high-speed camera, are additionally provided with cross calibration line (6) above the experimental trough (3).
3. the experimental provision that a kind of slip boundary condition density current according to claim 1 and salt wedge generate, special
Sign is: the water guide case (10), the inlet tank (11) and described low-density water body water tank (21) bottom are equal
Equipped with drainage arrangement.
4. the experimental provision that a kind of slip boundary condition density current according to claim 1 and salt wedge generate, special
Sign is: the transmission speed of the transmission bottom (1) is adjustable.
5. the experimental provision that a kind of slip boundary condition density current according to claim 1 and salt wedge generate, special
Sign is: being equipped with replaceable blender (25) in the high density water body water tank (22).
6. the experimental provision that a kind of slip boundary condition density current according to claim 1 and salt wedge generate, special
Sign is: the experimental trough (3), water guide case (10), low-density water body water tank (21), high density water body water tank
(22), inlet tank (11) wall surface uses acrylic board.
7. the experimental provision that a kind of slip boundary condition density current according to claim 5 and salt wedge generate, special
Sign is: the central axis of the blender (25) is connect using dismountable axis piece connection ring with blade, and blade end attaches
There is thickening vanes plate, increases blade local stiffness.
8. the experimental provision that a kind of slip boundary condition density current according to claim 1 and salt wedge generate, special
Sign is: inlet tank (11) bottom is connect by third valve with high density water body water tank (22).
9. a kind of generation method of salt wedge, using device described in claim 1, it is characterised in that:
It opens and adjusts conveying belt and make to transmit bottom (1) and possess constant speed, open water pump, high density water body is from high density water body
Water tank (22) imports inlet tank (11) and enters fixed bottom (2) afterwards, and low-density water body is led from low-density water body water tank (21)
Enter water guide case (10), be guided to fairing (8) by guiding device (9), so enter transmission bottom (1), and with transmission
The identical speed of bottom (1) is flowed to fixed bottom (2), is finally formed and is slided on the fixation bottom (2) close to transmission bottom (1)
Move the density current head zone of boundary condition.
10. a kind of slip boundary condition density current experimental method, using device described in claim 1, it is characterised in that:
It is not turned on conveyer belt, relatively fixed bottom (2) speed of transmission bottom (1) is 0, opens water pump, and high density water body is from highly dense
It spends after water body water tank (22) import inlet tank 11 and enters fixed bottom (2), low-density water body is from low-density water body water tank
(21) water guide case (10) are imported, is guided to fairing (8) by guiding device (9), and then enter transmission bottom (1), finally
Salt wedge is formed on the fixation bottom (2) close to transmission bottom (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399452.6A CN109506882B (en) | 2018-11-22 | 2018-11-22 | Experimental device and method for generating slip boundary condition density flow and saline wedge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399452.6A CN109506882B (en) | 2018-11-22 | 2018-11-22 | Experimental device and method for generating slip boundary condition density flow and saline wedge |
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| Publication Number | Publication Date |
|---|---|
| CN109506882A true CN109506882A (en) | 2019-03-22 |
| CN109506882B CN109506882B (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811399452.6A Active CN109506882B (en) | 2018-11-22 | 2018-11-22 | Experimental device and method for generating slip boundary condition density flow and saline wedge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146252A (en) * | 2019-04-19 | 2019-08-20 | 浙江大学 | A kind of density current experimental provision and method considering environment liquid mechanism of action |
| CN114486172A (en) * | 2022-02-11 | 2022-05-13 | 上海交通大学 | Density temperature layering simulation experiment water tank device |
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| CN101424587A (en) * | 2008-11-25 | 2009-05-06 | 四川大学 | Polyphase fluid experimental tank system |
| CN103424240A (en) * | 2013-07-26 | 2013-12-04 | 四川大学 | Temperature difference-sediment coupling density flow simulation test system |
| CN105841920A (en) * | 2016-03-23 | 2016-08-10 | 河海大学 | Riverbed bed load vertical section separating model test device and use method thereof |
| CN106228885A (en) * | 2016-06-30 | 2016-12-14 | 珠江水利委员会珠江水利科学研究院 | The demonstration equipment of salt wedge motion |
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2018
- 2018-11-22 CN CN201811399452.6A patent/CN109506882B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101424587A (en) * | 2008-11-25 | 2009-05-06 | 四川大学 | Polyphase fluid experimental tank system |
| CN100587441C (en) * | 2008-11-25 | 2010-02-03 | 四川大学 | Polyphase fluid experimental tank system |
| CN103424240A (en) * | 2013-07-26 | 2013-12-04 | 四川大学 | Temperature difference-sediment coupling density flow simulation test system |
| CN105841920A (en) * | 2016-03-23 | 2016-08-10 | 河海大学 | Riverbed bed load vertical section separating model test device and use method thereof |
| CN106228885A (en) * | 2016-06-30 | 2016-12-14 | 珠江水利委员会珠江水利科学研究院 | The demonstration equipment of salt wedge motion |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146252A (en) * | 2019-04-19 | 2019-08-20 | 浙江大学 | A kind of density current experimental provision and method considering environment liquid mechanism of action |
| CN110146252B (en) * | 2019-04-19 | 2020-10-13 | 浙江大学 | Density flow experimental device and method considering environmental fluid action mechanism |
| CN114486172A (en) * | 2022-02-11 | 2022-05-13 | 上海交通大学 | Density temperature layering simulation experiment water tank device |
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| CN109506882B (en) | 2020-10-13 |
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