CN102865994A - Test device and test method of occurrence and movement rule of temperature difference flow backward density current - Google Patents
Test device and test method of occurrence and movement rule of temperature difference flow backward density current Download PDFInfo
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- CN102865994A CN102865994A CN2012103174260A CN201210317426A CN102865994A CN 102865994 A CN102865994 A CN 102865994A CN 2012103174260 A CN2012103174260 A CN 2012103174260A CN 201210317426 A CN201210317426 A CN 201210317426A CN 102865994 A CN102865994 A CN 102865994A
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Abstract
The invention relates to a test device and a test method of the occurrence and movement rule of temperature difference flow backward density current. A transparent glass straightway rectangular section adverse grade open channel trough is mainly constructed, and corresponding cold and hot water preparation systems and a water inlet power device are matched. A current meter and a temperature recorder are erected on an observation section of the test trough, and a video camera is helps to capture in a movement manner and is combined with a camera on a fixed position to form an observing system to monitor the submerging point and head part of flow backward density current, the hydraulics in the moving process and the temperature parameter. By adopting the device and the method, the shortage in the outdoor monitoring timeliness and synchronism can be overcome, background understanding and data support can be supplied for further numerical simulation analysis, and the support is supplied for deepening the understanding of the flow backward density current of a tributary reservoir and the water bloom mechanism based on the water dynamic property and changing the water power condition of a tributary through ecological scheduling of the reservoir to improve the quality of water in the reservoir and avoid water bloom.
Description
Technical field
The present invention relates to a kind of temperature difference and pour in down a chimney test unit and the method for density current generation and the characteristics of motion.
Background technology
Oneself is of a specified duration for the discovery of density current and research origin, according to the difference of its base slope with respect to the Density Currents direction, can be divided into along sloping density current and Adverse Slope Density Current.Up to now, from theoretical analysis, model test to aspects such as numerical simulations, Chinese scholars is to having carried out large quantity research along sloping density current, and achievement also is widely applied in engineering practice, has obtained remarkable benefit.Because the ubiquity of Adverse Slope Density Current and scale itself are not extensive along sloping density current, thereby at present still rare to the research of Adverse Slope Density Current.In middle discovery that Three Gorges Reservoir and typical tributary Ku Wan are studied for a long period of time, because behind the Impoundment of Three Gorges Reservoir, the temperature difference is remarkable at the bottom of the backwater reach table, Heavenly Stems and Earthly Branches stream exists water temperature difference and sediment concentration poor, therefore the master stream water body enters Ku Wan to pour in down a chimney the density current form, so that gulf, storehouse, most of tributary exists obvious counter-slope to pour in down a chimney density current.That the existence of pouring in down a chimney density current makes is dried, water exchange capacity and coverage increase between the tributary, the exchange of water body can change tributary flow characteristics, nutrient concentration and distribution, optical characteristics, water temperature delamination etc., thereby changes storehouse, tributary gulf body eutrophication and wawter bloom situation.At present to pouring in down a chimney Thermal Density Current except the initial analyses such as field monitoring and numerical simulation in the gulf, storehouse, ubiquity tributary, be necessary to pour in down a chimney the density current phenomenon in indoor reproduction, further be familiar with and study generation condition and the characteristics of motion of pouring in down a chimney density current.
Summary of the invention
The purpose of this invention is to provide a kind of temperature difference and pour in down a chimney test unit and the method for density current generation and the characteristics of motion, can reappear field monitoring to the temperature difference pour in down a chimney the density current phenomenon, also can remedy the deficiency of the ageing and synchronism of field monitoring and the restriction of monitoring capability, explication de texte pours in down a chimney generation condition and the characteristics of motion of density current.
The object of the present invention is achieved like this: a kind of temperature difference is poured in down a chimney density current and is occured and characteristics of motion test unit, comprise water supply installation and experimental tank, experimental tank is by inlet segment, observation section and tail water section consist of, the bottom land of experimental tank is sloping shape, between inlet segment and observation section, be provided with dividing plate, water inlet in inlet segment and water supply installation junction is provided with the energy dissipating grid, be provided with drainpipe in the tail water section, be provided with current meter and thermograph watch-dog at observation section section face, be provided with the video camera slideway in experimental tank one side, be provided with a plurality of monitoring cameras at the experimental tank opposite side.
Dividing plate adopts organic glass to make, and is provided with sealing strip in its both sides, and dividing plate can slide up and down in experimental tank.
Water supply installation is made of a stand pipe and distribution reservoir, and heating arrangement is housed in stand pipe, is used for the heat test water.
Bottom land is the base slope of an and variable slope reverse along water (flow) direction, and bottom land is made of organic glass cover plate and chiltern base slope.
The method that density current is tested is poured in down a chimney in a kind of bottom of carrying out, and may further comprise the steps:
(1) invasion water body preparation: ice cube is dissolved in the clear water of distribution reservoir, transfers to test temperature required, add again potassium permanganate dyeing;
(2) the tank environment water is prepared: plug the organic glass baffle plate after clear water leaves standstill in tank, add ice cube and potassium permanganate in the inlet segment water body, make its temperature and water body concentration all consistent with water body in the distribution reservoir;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane, and is taken by the special messenger; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
The density current test is poured in down a chimney on a kind of top layer of carrying out, and may further comprise the steps:
(1) invasion water body preparation: hot water is mixed with normal-temperature water, obtain the mixed water body that water temperature is higher than normal-temperature water, add again potassium permanganate dyeing;
(2) the tank environment water is prepared: plug the organic glass baffle plate after clear water leaves standstill in tank, add ice cube and potassium permanganate in the inlet segment water body, make its temperature and water body concentration all consistent with water body in the distribution reservoir;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane, and is taken by the special messenger; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
The density current test is poured in down a chimney in a kind of middle level of carrying out, and may further comprise the steps:
(1) invasion water body preparation: need two kinds of invasions of preparation water body, invasion water body A and invasion water body B are dissolved in ice cube in the clear water of distribution reservoir first, transfer to the required lower temperature that is lower than normal temperature of test, do not add potassium permanganate, obtain invading water body A; The preparation of invasion water body B is again preparation after pour in down a chimney the bottom of finishing invasion water body A, and its temperature is consistent with the inlet segment temperature, and temperature is between tank environment water and table end water temperature, and the potassium permanganate of adding design quantity dyes to it;
(2) the tank environment water is prepared: plug dividing plate after clear water leaves standstill in tank, add an amount of ice cube in the inlet segment water body, regulate its temperature consistent with invasion water body A in the water tank, pour in down a chimney density current bottom carrying out immediately once; When treating that tank forms stable water temperature delamination along journey and along the degree of depth, plug the organic glass baffle plate again, stir evenly the water body in the inlet segment, add an amount of potassium permanganate behind temperature stabilization, this moment, temperature and the potassium permanganate concentration of inlet segment water body were identical with invasion water body B;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane to be taken; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
The temperature difference provided by the invention is poured in down a chimney density current and is occured and characteristics of motion test unit and test method, can reappear field monitoring to the temperature difference pour in down a chimney the density current phenomenon, also can remedy the deficiency of the ageing and synchronism of field monitoring and the restriction of monitoring capability, explication de texte pours in down a chimney generation condition and the characteristics of motion of density current.For in-depth understanding as the gulf in the waters such as storehouse, Three Gorges Reservoir tributary pouring in down a chimney density current and provide the hydraulics basis based on the breakout of water bloom mechanism of this hydrodynamic property, improve gulf, storehouse water quality and the inhibition wawter bloom provides support for exploring the hydrodynamic condition that changes the tributary by the reservoir ecological dispatching to reach.
The present invention by lab simulation can reappear preferably field monitoring to the temperature difference of different shape pour in down a chimney the density current phenomenon, explication de texte pours in down a chimney generation condition and the characteristics of motion of density current, remedy the deficiency of the ageing and synchronism of field monitoring and the restriction of monitoring capability, overcome simultaneously uncertainty and the complicacy of numerical simulation self, and be familiar with and sufficient calibration data for further numerical simulation provides clearer Geodynamic Settings.
Method provided by the present invention is simple, and device cost is less, and can fill up present ultra-large type reservoir tributary Ku Wan and pour in down a chimney blank in the density current experimental study.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 2.
Fig. 4 is the diaphragm structure schematic diagram of Fig. 1.
Embodiment
Principle of the present invention is to make up full transparent glass straight way rectangular cross section adverse grade open channel tank, is furnished with corresponding hot water or cold water's compounding system and water inlet propulsion system.Experimental tank is comprised of with tail water section three parts inlet segment (simulation main stream of the Yangtze), observation section (simulating typical tributary Ku Wan), and base slope can be realized gradient eustasy; Lucite spacer (simulating the mouth that crosses of gulf, storehouse, typical tributary and main stream of the Yangtze) is set between inlet segment and observation section; In addition, the water inlet in inlet segment and water tank or water tower junction is provided with suitable energy-dissipating installation, in order to become a mandarin steadily.During test, distribution reservoir invasion water body utilizes the inlet segment supply of exogenous power device suction tank to pour in down a chimney the invasion water body of density current, set up the three-dimensional point type current meter of Doppler and multichannel temperature record watch-dog in experimental tank observation section, the camera of taking in conjunction with the fixed position by DV video camera mobile tracking forms observation section recording geometry together.
Take initial water level, inbound traffics, these three dominant factors of temperature difference as basic variable, design a series of typical conditions, overall minute four steps namely invaded water body preparation, the preparation of tank environment water, observation instrument equipment debugging, test and observe, just can in experimental tank, reappear bottom, middle level and the top layer temperature difference and pour in down a chimney the density current phenomenon, and study generation and the characteristics of motion of pouring in down a chimney density current.
Structure of the present invention is shown in Fig. 1-4, a kind of temperature difference is poured in down a chimney density current and is occured and characteristics of motion test unit, comprise water supply installation and experimental tank 1, experimental tank 1 is by inlet segment, observation section and tail water section consist of, the bottom land 2 of experimental tank is sloping shape, between inlet segment and observation section, be provided with dividing plate 3, water inlet in inlet segment and water supply installation junction is provided with energy dissipating grid 4, be provided with drainpipe 5 in the tail water section, the section face corresponding positions different in the observation section arrange current meter 6 and thermograph watch-dog 7, be provided with video camera slideway 8 in experimental tank 1 one sides, be provided with a plurality of monitoring cameras 9 at experimental tank 1 opposite side.
Water supply installation is made of a stand pipe 11 and distribution reservoir 12, and heating arrangement 13 is housed in stand pipe 11, is used for the heat test water.Heating arrangement 13 adopts heating rod.
Below be a structure example of the present invention:
In Fig. 1, experimental tank 1 long 1000 cm, wide 30 cm.Experimental tank is comprised of with tail water section three parts inlet segment (simulation main stream of the Yangtze), observation section (simulating typical tributary Ku Wan).Wherein, water inlet segment length 150 cm arrange the mouth that crosses that lucite spacer 3(simulates gulf, storehouse, typical tributary and main stream of the Yangtze between inlet segment and observation section), lucite spacer 3 can steadily be twitched up and down; In addition, the water inlet in inlet segment and water tank or water tower junction is provided with the energy dissipating grid, in order to become a mandarin steadily.Observation section overall length 421 cm are divided into a, b, and c, d, e, f, g, eight measuring frequency sections of h are laid in respectively apart from dividing plate 71,121,171,221,271,321,371 and 421 cm places.The tank remainder is the tail water section, and the terminal overflow pipe of installing is controlled the tank water level.The 1st measuring frequency section set up Norway when producing the three-dimensional point type current meter of acoustic Doppler and slipping into the observation section with monitoring inlet segment water body near the section of slipping into flow velocity big or small; Near the 5th measuring frequency section, set up 32 channel temperatures record watch-dog, change in order to hierarchical monitor cross sections different depth water temperature; In tank one side the video camera slideway special is set, with the DV video camera density current head is carried out mobile tracking and take, arrive the used time of each monitoring section with record density current head; Arrange three cameras at the tank opposite side, every 10 s left and right sides synchronous recordings once each monitoring section pour in down a chimney density current thickness.
External water distribution system comprises a stand pipe and water tank.Long 250 cm of water tower, cross dimensions is 250 * 50 cm, being used for provides the test normal-temperature water, and in water tower 4 large power, electrically hot pins of assembling, be used for the heat test water, be mainly used in the top layer and pour in down a chimney the density current test.Distribution reservoir is of a size of 75 * 50 * 75 cm, and plastic material is used for configuring bottom and middle level and pours in down a chimney the invasion cold water of density current and the invasion hot water that density current is poured in down a chimney on the top layer.
In Fig. 2, visible experimental tank glass edge wall, the bottom covers organic glass cover-plate along the reverse and variable base slope of water (flow) direction on the base slope.The organic glass baffle plate separates tank inlet segment and observation section, and inlet segment is placed the energy dissipating grid; Measuring frequency section is laid the water temperature monitoring probe along depth direction.Near density current slipped into a little, the current meter height lifting was poured in down a chimney density current for monitoring and is slipped into a change in flow with the current meter frame.Water tower height overall 250 cm, base 100 cm wherein are so that can flow automatically intake chamber and distribution reservoir of water body in the water tower laid heating rod in the water tower simultaneously.
In Fig. 3, the visible variable base slope of tank chiltern and the upper organic glass cover plate that covers thereof, cover plate prevents from pouring in down a chimney density current and washes away the chiltern base slope, affects base slope kenel and slope ratio.High 75 cm of distribution reservoir, in distribution reservoir, place submersible pump, there are color cold water or hot water to pump into the tank inlet segment by water inlet pipe test, the water pump water outlet bore is 2 cm, pipe outlet is downward, be placed on energy dissipating grid left side in the tank, density current invasion water body, simulation Impoundment of Three Gorges Reservoir process (being the water level uphill process) are poured in down a chimney in supply.
Visible organic glass baffle plate 100 * 30 * 6 mm of Fig. 4 detail drawing separate tank inlet segment and observation section, simulate the mouth that crosses of gulf, storehouse, typical tributary and main stream of the Yangtze, and lucite spacer can steadily be twitched up and down, realizes the phagocytic process of inlet segment water body.Simultaneously in the organic glass baffle plate draw-in groove caulking gum is arranged, can prevent that baffle plate takes out advancing water section water body and enter the observation section, affect test effect.
Utilize device provided by the invention to carry out the method that the density current test is poured in down a chimney in the bottom, may further comprise the steps:
(1) invasion water body preparation: ice cube is dissolved in the clear water of distribution reservoir, transfers to test temperature required, add again potassium permanganate dyeing;
(2) the tank environment water is prepared: plug the organic glass baffle plate after clear water leaves standstill in tank, add ice cube and potassium permanganate in the inlet segment water body, make its temperature and water body concentration all consistent with water body in the distribution reservoir;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane, and is taken by the special messenger; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
Utilize device provided by the invention to carry out the top layer and pour in down a chimney the density current test, may further comprise the steps:
(1) invasion water body preparation: hot water is mixed with normal-temperature water, obtain the mixed water body that water temperature is higher than normal-temperature water, add again potassium permanganate dyeing;
(2) the tank environment water is prepared: plug the organic glass baffle plate after clear water leaves standstill in tank, add ice cube and potassium permanganate in the inlet segment water body, make its temperature and water body concentration all consistent with water body in the distribution reservoir;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane, and is taken by the special messenger; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
Utilize device provided by the invention to carry out the middle level and pour in down a chimney the density current test, may further comprise the steps:
(1) invasion water body preparation: need two kinds of invasions of preparation water body, invasion water body A and invasion water body B are dissolved in ice cube in the clear water of distribution reservoir first, transfer to the required lower temperature that is lower than normal temperature of test, do not add potassium permanganate, obtain invading water body A; The preparation of invasion water body B is again preparation after pour in down a chimney the bottom of finishing invasion water body A, and its temperature is consistent with the inlet segment temperature, and temperature is between tank environment water and table end water temperature, and the potassium permanganate of adding design quantity dyes to it;
(2) the tank environment water is prepared: plug dividing plate after clear water leaves standstill in tank, add an amount of ice cube in the inlet segment water body, regulate its temperature consistent with invasion water body A in the water tank, pour in down a chimney density current bottom carrying out immediately once; When treating that tank forms stable water temperature delamination along journey and along the degree of depth, plug the organic glass baffle plate again, stir evenly the water body in the inlet segment, add an amount of potassium permanganate behind temperature stabilization, this moment, temperature and the potassium permanganate concentration of inlet segment water body were identical with invasion water body B;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane to be taken; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
Used potassium permanganate concentration is 0.01 g/L in the above-mentioned test, and through checking computations, this concentration can be ignored on the impact of two kinds of water body density differences.
Claims (7)
1. a temperature difference is poured in down a chimney density current generation and characteristics of motion test unit, comprise water supply installation and experimental tank (1), it is characterized in that: experimental tank (1) is by inlet segment, observation section and tail water section consist of, the bottom land of experimental tank (2) is sloping shape, between inlet segment and observation section, be provided with dividing plate (3), water inlet in inlet segment and water supply installation junction is provided with energy dissipating grid (4), be provided with drainpipe (5) in the tail water section, be provided with current meter (6) and thermograph watch-dog (7) in the corresponding position of observation section section face, be provided with the video camera slideway (8) that video camera is installed in experimental tank (1) one side, be provided with a plurality of monitoring cameras (9) at experimental tank (1) opposite side.
2. the temperature difference according to claim 1 is poured in down a chimney density current generation and characteristics of motion test unit, it is characterized in that: dividing plate (3) adopts organic glass to make, and is provided with sealing strip (10) in its both sides, and dividing plate (3) can slide up and down in experimental tank.
3. the temperature difference according to claim 1 is poured in down a chimney density current generation and characteristics of motion test unit, it is characterized in that: water supply installation is made of a stand pipe (11) and distribution reservoir (12), heating arrangement (13) is housed in stand pipe (11), is used for the heat test water.
4. the temperature difference according to claim 1 pours in down a chimney that density current occurs and characteristics of motion test unit, it is characterized in that: bottom land (2) is the base slope of an and variable slope reverse along water (flow) direction, and bottom land (2) is by organic glass cover plate (14) and chiltern base slope formation.
5. utilize device claimed in claim 1 to carry out the method that the density current test is poured in down a chimney in the bottom, it is characterized in that: may further comprise the steps:
(1) invasion water body preparation: ice cube is dissolved in the clear water of distribution reservoir, transfers to test temperature required, add again potassium permanganate dyeing;
(2) the tank environment water is prepared: plug the organic glass baffle plate after clear water leaves standstill in tank, add ice cube and potassium permanganate in the inlet segment water body, make its temperature and water body concentration all consistent with water body in the distribution reservoir;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane, and is taken by the special messenger; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
6. utilize device claimed in claim 1 to carry out the top layer and pour in down a chimney the density current test, it is characterized in that: may further comprise the steps:
(1) invasion water body preparation: hot water is mixed with normal-temperature water, obtain the mixed water body that water temperature is higher than normal-temperature water, add again potassium permanganate dyeing;
(2) the tank environment water is prepared: plug the organic glass baffle plate after clear water leaves standstill in tank, add ice cube and potassium permanganate in the inlet segment water body, make its temperature and water body concentration all consistent with water body in the distribution reservoir;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane, and is taken by the special messenger; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
7. utilize device claimed in claim 1 to carry out the middle level and pour in down a chimney the density current test, it is characterized in that: may further comprise the steps:
(1) invasion water body preparation: need two kinds of invasions of preparation water body, invasion water body A and invasion water body B are dissolved in ice cube in the clear water of distribution reservoir first, transfer to the required lower temperature that is lower than normal temperature of test, do not add potassium permanganate, obtain invading water body A; The preparation of invasion water body B is again preparation after pour in down a chimney the bottom of finishing invasion water body A, and its temperature is consistent with the inlet segment temperature, and temperature is between tank environment water and table end water temperature, and the potassium permanganate of adding design quantity dyes to it;
(2) the tank environment water is prepared: plug dividing plate after clear water leaves standstill in tank, add an amount of ice cube in the inlet segment water body, regulate its temperature consistent with invasion water body A in the water tank, pour in down a chimney density current bottom carrying out immediately once; When treating that tank forms stable water temperature delamination along journey and along the degree of depth, plug the organic glass baffle plate again, stir evenly the water body in the inlet segment, add an amount of potassium permanganate behind temperature stabilization, this moment, temperature and the potassium permanganate concentration of inlet segment water body were identical with invasion water body B;
(3) near observation instrument equipment debugging: the current meter frame density current slips into a little, is set parameter; Simultaneously, whether the thermometer probe that checks each section part is put into the degree of depth reasonable, and Tc watch-dog reading; Camera is placed on fixing seat in the plane to be taken; Video camera is put into special stand;
(4) test and observe: select test power demand submersible pump, put into distribution reservoir, then take out dividing plate and start submersible pump, take the density current head with video camera along the slideway mobile tracking, arrive the used time of each section with the record density current, at regular intervals synchronous recording once each section pour in down a chimney density current thickness, the application image recognition technology reads and pours in down a chimney density current and slip in the process that head arrives each measuring frequency section time and along data such as Cheng Houdu, current meter and temperature monitor then continue respectively record and slip into a little near density current flow velocity and each section stratification temperature after the test.
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| CN103424240A (en) * | 2013-07-26 | 2013-12-04 | 四川大学 | Temperature difference-sediment coupling density flow simulation test system |
| CN106017426A (en) * | 2016-05-06 | 2016-10-12 | 浙江大学 | Method for predicting gate opening type density flow separation depth in linear stratified water environment |
| CN106290073A (en) * | 2016-09-28 | 2017-01-04 | 中国科学院、水利部成都山地灾害与环境研究所 | A kind of novel chip flow field simulation experimental provision |
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| CN109853457A (en) * | 2019-02-01 | 2019-06-07 | 长江水利委员会长江科学院 | A kind of experimental provision for simulating water temperature delamination movement and stratified pumping measure effect |
| CN110375950A (en) * | 2019-06-25 | 2019-10-25 | 浙江大学 | A kind of driving density current of particle is stable to be gone out to flow device |
| CN110375950B (en) * | 2019-06-25 | 2020-10-13 | 浙江大学 | Granule driving type density flow stable outflow device |
| CN113029517A (en) * | 2021-03-11 | 2021-06-25 | 清华大学 | Device for researching mixing of density flow reverse flow and dry branch |
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