CN103077652A - Experimental device for simulating smoke prevention system of heating and ventilation equipment of high-rise building - Google Patents
Experimental device for simulating smoke prevention system of heating and ventilation equipment of high-rise building Download PDFInfo
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Abstract
The invention relates to an experimental device for simulating a smoke prevention system of heating and ventilation equipment of a high-rise building. The experimental device comprises a head brine tank, a head clear water tank, a water storage tank and a high-rise building model, wherein the bottom of the head clear water tank is connected with a clear water discharge pipe, the bottom of the head brine tank is connected with a brine discharge pipe, the water storage tank consists of an inner water tank and an outer water, and the high-rise building model is positioned in the inner water tank; and a storey area and a vertical shaft area are distributed on the left side and the right side of the high-rise building model, wherein each storey of the storey area is communicated with the clear water discharge pipe, each storey of the storey layer and the vertical shaft area are communicated through a gap of an simulated elevator door, the top of the high-rise building model is communicated with the brine discharge pipe through a brine buffer, the top of the vertical shaft area is provided with a top opening, the bottom of the vertical shaft area is provided with a bottom opening, and the bottom opening is communicated with the outer water tank. The experimental device disclosed by the invention has the capabilities of predicting a temperature field in a prototype building by a building model experiment, intuitively demonstrating the generation and development process of smoke and providing important experiment data for achieving a scheme for elevating a neutral plane to be above the total height of the building.
Description
Technical field
The present invention relates to a kind of experimental provision, especially for the experimental provision of simulation skyscraper heating and ventilating equipment fume-resisting system.
Background technology
The skyscraper smoke control system is very important content in the architectural fire-protection methods.Skyscraper is compared with common tier building, has the characteristics such as story height, Travel distance be far away, and the skyscraper Smoke control system design is more complicated.According to statistics, the number of casualties is choked to death owing to being subject to fire smoke more than 70% in the fire of high-rise building, so the control of the flue gas under the fire of high-rise building situation is most important.The flowing law of flue gas mainly contains three kinds of means in the research building fire, i.e. full size fire test, small-scale model experiment and Computer Numerical Simulation.The full size fire test is desirable, the most reliable research, but need to expend a large amount of financial resources, and the randomness of experiment is with repeatable poor; Computer Numerical Simulation is to study at present the relatively more popular method of Regularity of Smoke Movement, and take mathematics physics model as the basis, the operating mode that can simulate is many, and the randomness of fire is the Main Means of future studies fire with better repeatable; Saline experiment belongs to the small-scale model test, and it adopts the flowing law that flow come simulated fire flue gas of certain density salt solution in clear water, and process is directly perceived, favorable repeatability, and experimental expenses is low, is subject to people's attention gradually.
Because the difference of condition of technology and economy, country variant skyscraper Smoke control system design also is not quite similar.But Smoke-proof Stairwells in High-rise Buildingsei is carried out mechanical Smoke pressurized air supply system, and various countries have reached common recognition substantially.China's existing " Code for fire protection design of high rise buildings " (GB 50045-95) regulation is for the smoke proof staircase pressure air blowing that does not possess the natural draught system condition, and forced draught blower is arranged on mechanical penthouse, every 2～3 layers a pressure air blowing mouth is set.There is one " neutral plane " in mobile being referred to as " chimney effect " of the interior flue gas of Shaft of High-rise Buildings (staircase, elevator, Zhongting) at a certain height.Below " neutral plane ", cold air enters vertical shaft to be mixed with high-temperature flue gas, and more than " neutral plane ", flue gas enters floor by the slit of vertical shaft, this also be flue gas in the main thoroughfare of building height vertical spread, namely can cause the expansion of fire.After building fire occured, the smoke proof staircase the mechanic pressure blow system started, and flue gas can't enter staircase, thereby lift well becomes the main thoroughfare of flue gas vertical motion.More than " neutral plane ", flue gas enters floor area by the slit of vertical shaft, can cause life to threaten to personnel.A kind of when improving fire in the skyscraper zone scheme of personnel's security be: " neutral plane " is increased to more than the building general height, namely the flue gas of all floors or air enter lift well below " neutral plane " like this, opening by upper ends of elevator shafts drains into atmosphere again, thereby improves the personal security in the high-rise zone.Given this, design a kind of experimental provision, in order to simulate the different elevator open top area of skyscraper and different air output to the impact of flow of flue gas, carrying out ocular demonstration and important experimental data is provided for above-mentioned " neutral plane " is increased to the above scheme of building general height, is very necessary.
Summary of the invention
Purpose of the present invention is to provide a kind of experimental provision that can intuitively show the simulation skyscraper heating and ventilating equipment fume-resisting system of flow of flue gas in the lift well.
Problem of the present invention realizes with following technical proposals:
A kind of experimental provision of simulating skyscraper heating and ventilating equipment fume-resisting system, special feature is: it comprises high-order brine tank, high-order filtered water tank, reserve tank and model of high-rise building, high-order filtered water tank bottom connects the clear water drainpipe, high-order brine tank bottom connects the salt solution drainpipe, described reserve tank is positioned at high-order brine tank, high-order filtered water tank bottom, reserve tank is made of inner water tank, outer water tank, and model of high-rise building is positioned at inner water tank; The floor zone and the vertical shaft district that distribute about described model of high-rise building is provided with, floor zone arranges multilayer from high to low, each layer is communicated with the clear water drainpipe through clear water impact damper, clear water inlet adjusting ball valve, each floor of floor zone is communicated by simulant elevator crack between a door and its frame crack with the vertical shaft district, the model of high-rise building top is communicated with the salt solution drainpipe through the salt weed buffer, top, described vertical shaft district is provided with open top, the bottom is provided with bottom opening, and bottom opening is communicated with outer water tank.
The experimental provision of above-mentioned simulation skyscraper heating and ventilating equipment fume-resisting system, described experimental provision also is provided with filtered water tank and brine tank, and filtered water tank is communicated with high-order filtered water tank through clarified water pump and clear water feed pipe, and high-order filtered water tank is provided with the clean water overflow pipe that is communicated with filtered water tank; Brine tank is communicated with high-order brine tank through brine pump and salt solution feed pipe, and high-order brine tank is provided with the salt solution run-down pipe that is communicated with brine tank.
The experimental provision of above-mentioned simulation skyscraper heating and ventilating equipment fume-resisting system is provided with clear water spinner-type flowmeter inlet ball valve, clear water spinner-type flowmeter, clear water spinner-type flowmeter vent ball valve successively on the described clear water drainpipe; Be provided with successively salt solution spinner-type flowmeter inlet ball valve, salt solution spinner-type flowmeter, salt solution spinner-type flowmeter vent ball valve on the described salt solution drainpipe.
The experimental provision of above-mentioned simulation skyscraper heating and ventilating equipment fume-resisting system, described clear water feed pipe is provided with high-order filtered water tank inlet ball valve, is communicated with by clear water by-pass pipe and high-order filtered water tank release valve ball between clear water feed pipe and the clear water drainpipe; Described salt solution feed pipe is provided with high-order brine tank inlet ball valve, is communicated with by salt solution by-pass pipe and high-order brine tank release valve ball between salt solution feed pipe and the salt solution drainpipe.
The experimental provision of described simulation skyscraper heating and ventilating equipment fume-resisting system, described vertical shaft district side is provided with altitude scale.
Originally for utilizing skyscraper heating and ventilating equipment air-supply fume-resisting system, personnel's safety issue in the skyscraper zone provides a kind of experimental provision when improving fire in the present invention.This experimental provision is according to similarity theory, in clear water, spread the floating motion of flue gas in cold air of the rapids of comparing with the salt solution that rapid buoyancy is arranged, under the condition of known models building and the ratio of prototype building relevant variable, can be by the temperature field in the model building test prediction prototype building, the flowing law of flue gas in the architectural shaft under the different hvac equipment air outputs, the generation of ocular demonstration flue gas, evolution are increased to the above scheme of building general height important experimental data are provided for realizing " neutral plane ".Experimentation of the present invention is directly perceived, favorable repeatability, and experimental expenses is low.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is synoptic diagram of the present invention;
Fig. 2 is A place partial enlarged view among Fig. 1;
Fig. 3 is salt weed buffer synoptic diagram.
Each list of reference numerals is among Fig. 1: 1. brine tank, 2. salt solution run-down pipe, 3. high-order brine tank, 4. high-order brine tank inlet ball valve, 5. high-order brine tank release valve ball, 6. salt solution by-pass pipe, 7. salt solution drainpipe, 8. salt solution spinner-type flowmeter inlet ball valve, 9. salt solution spinner-type flowmeter, 10. salt solution spinner-type flowmeter vent ball valve, 11. brine pumps, 12. reserve tanks, 12-1. inner water tank, 12-2. outer water tank, 13. model of high-rise building, 14. the salt weed buffer, 15. floor zone, 16. vertical shaft districts, 16-1. open top, 16-2. bottom opening, 17. altitude scales, 18. simulant elevator crack between a door and its frame crack, 19. clear water impact dampers, 20. clear water inlet adjusting ball valves, 21. filtered water tank, 22. clean water overflow pipes, 23. high-order filtered water tanks, 24. high-order filtered water tank inlet ball valve, 25. high-order filtered water tank release valve ball, 26. clear water by-pass pipes, 27. clear water drainpipes, 28. clear water spinner-type flowmeter inlet ball valve, 29. the clear water spinner-type flowmeter, 30. clear water spinner-type flowmeter vent ball valves, 31. clarified water pumps, 32. the clear water feed pipe, 33. salt solution feed pipes.
Embodiment
The experimental provision that the present invention is designed, in small-scale model experiment, to utilize salt solution under segregation drive, to move downward simulated flue gas by the moving upward of buoyancy-driven, the temperature difference of flue gas and air in the density difference simulation fire of high-rise building that produces with salt solution and clear water.Clear water analogy outside air, the flue gas that salt solution analogy building fire produces.The salt solution of dyeing enters the model of high-rise building top by the brine pipeline system, the high-temperature flue gas that the simulant building fire occurs, and clear water enters the floor area of model of high-rise building, the effect of simulant building hvac equipment air-supply by the fresh water pipeline system.This experimental provision can intuitively show dyeing salt solution evolution and interaction under the effect of sending into the floor area clear water, and the phenomenon inversion that saline experiment observes is come, and is the flowing law of conflagration smoking of constructions.
Referring to Fig. 1, the present invention includes brine tank 1, high-order brine tank 3, filtered water tank 21, high-order filtered water tank 23, reserve tank 12 and model of high-rise building 13.Filtered water tank 21 pumps into high-order filtered water tank 23 through clarified water pump 31 and clear water feed pipe 32 with clear water, high-order filtered water tank returns clear water to filtered water tank by clean water overflow pipe 22, to guarantee the stable level of high-order filtered water tank, applied pressure is remained unchanged, high-order filtered water tank 23 bottoms are provided with clear water drainpipe 27, and clear water drainpipe 27 is communicated with model of high-rise building 13.Brine tank 1 pumps into high-order brine tank 3 through brine pump 11 and salt solution feed pipe 33 with salt solution, high-order brine tank returns salt solution to brine tank 1 by salt solution run-down pipe 2, to guarantee the stable level of high-order brine tank, applied pressure is remained unchanged, high-order brine tank bottom connects salt solution drainpipe 7, and salt solution drainpipe 7 is communicated with model of high-rise building 13.
Referring to Fig. 1, Fig. 2, described reserve tank 12 is positioned at the bottom of high-order brine tank 3, high-order filtered water tank 1, and reserve tank is made of inner water tank 12-1, outer water tank 12-2, and model of high-rise building 13 is positioned at inner water tank.Be full of clear water in the inner water tank 12-1, be clear water around the model of high-rise building 13.The mixed pool of mixing with salt solution for clear water between inner water tank 12-1 and outer water tank 12-2, outer water tank 12-2 top is provided with overflow pipe, and the water in the mixed pool is drained by run-down pipe.The floor zone 15 and the vertical shaft district 16 that distribute about described model of high-rise building 13 is provided with, floor zone simulation skyscraper arranges multilayer from high to low, each layer is communicated with clear water drainpipe 27 through clear water impact damper 19, clear water inlet adjusting ball valve 20, clear water inlet adjusting ball valve 20 can be according to the adjust flux that requires of experiment condition, and can realize designated floor is carried clear water.Each floor of floor zone 15 is communicated by simulant elevator crack between a door and its frame crack 18 with vertical shaft district 16.The top of model of high-rise building 13 is communicated with salt solution drainpipe 7 through salt weed buffer 14, top, described vertical shaft district is provided with open top 16-1, can be by the conductivity (converting out concentration and the density of salt solution) of this mouthful measurement vertical shaft differing heights place salt solution, also can simulate salt solution simultaneously to the swabbing action of clear water (simulated flue gas is the swabbing action of air to external world) on every side.Bottom, vertical shaft district is provided with bottom opening 16-2, and bottom opening is communicated with outer water tank 12-2, and the bottom opening place is provided with a plurality of osculums, can require to determine to open or close osculum according to experiment condition.16 sides are provided with altitude scale 17 in the vertical shaft district, measure the variation of salt solution thickness in the lift well by altitude scale.
Referring to Fig. 3, the import cross section sudden enlargement of salt weed buffer 14 arranges a plurality of eyelets in the exit, is equivalent to uniform flow orifice, can reduce the dynamic pressure of water, improves the static pressure of water, thereby improves the turbulivity that flows, and makes model experiment flow more similar to prototype.The structure of the structure of clear water impact damper 19 and salt weed buffer 14 and act on identical.
Still referring to Fig. 1, be provided with successively clear water spinner-type flowmeter inlet ball valve 28, clear water spinner-type flowmeter 29, clear water spinner-type flowmeter vent ball valve 30 on the clear water drainpipe 27.Clear water feed pipe 32 is provided with high-order filtered water tank inlet ball valve 24, be communicated with by clear water by-pass pipe 26 and high-order filtered water tank release valve ball 25 between clear water feed pipe 32 and the clear water drainpipe 27, clear water by-pass pipe 26 and high-order filtered water tank release valve ball 25 can be regulated clear water flow.Be provided with successively salt solution spinner-type flowmeter inlet ball valve 8, salt solution spinner-type flowmeter 9, salt solution spinner-type flowmeter vent ball valve 10 on the described salt solution drainpipe 7.Salt solution feed pipe 33 is provided with high-order brine tank inlet ball valve 4, is communicated with by salt solution by-pass pipe 6 and high-order brine tank release valve ball 5 between salt solution feed pipe 33 and the salt solution drainpipe 7, and salt solution by-pass pipe 6 and high-order filtered water tank release valve ball 5 can be regulated brine flow.
Below for adopting described experimental provision to carry out the theoretical foundation of saline experiment.The basic theories of salt water model test can be summarized with the analogy of heat and quality transmission, and namely the motion of the buoyancy of flue gas is simulated with the density difference in the clear water in the building fire.Brine density is greater than clear water density, and flue-gas temperature is higher than ambient air temperature, as long as both governing equations are consistent, two kinds of motions just may realize similar.In the building fire process, spatial altitude is H, and the burning things which may cause a fire disaster heat dissipation capacity is Q, and buoyance flux is B, and its characteristic quantity is defined as follows: characteristic length is height space H and h, and characteristic velocity is U=(B/H)
1/3And V=(b/h)
1/3, the characteristic time is τ=H/U and τ=h/V, through the zero dimension processing, the governing equation of flow of flue gas is:
The poor Fluid Control Equation that causes of brine density is:
K wherein
i=(0,1,0),
,
, each criterion numeral is respectively:
Flow of flue gas:
,
,
Saline flow:
,
,
This shows that smoke movement is identical with the governing equation form of saline flow, if both criterion numeral Re, Fr, Pr, Sc equate that respectively then the two is similar.
Two on all four necessary and sufficient condition of phenomenon are: (1) geometric similarity; (2) the inlet flow situation is similar; (3) physical parameter of each corresponding point is similar; (4) boundary condition is similar; (5) criterion numeral of the same name equates.Wherein criterion equates to be difficult to most comparatively speaking realize.The Re number is to determine the mechanically similar major parameter in flow field, and the Re order of magnitude that general smoke plume flows is 10
5, the Re order of magnitude of salt water sport is 10
4, the two is unequal, but the two has all reached the turbulent flow state, and can think that the impact of Reynolds number flow is not bery important this moment.The Fr number represents the ratio of inertial flow power and gravity, and the Fr number when actual checking computations show flue gas and saline flow is the same order of magnitude.Pr number and Sc number represent the physical properties of fluids criterion numeral, and the former determines the mobile length of flue gas and the similarity degree of velocity field, and the latter determines the similarity degree of brine concentration field and velocity field.In the scope of discussing at present, these two dimensionless numbers are respectively turbulent flow Pr
tNumber and turbulent flow Sc
tNumber, the two is all close to 1, can think their approximately equal.In sum, it is feasible coming simulated flue gas to flow with saline flow.
The below describes with regard to the calculating that utilizes certain skyscraper heating and ventilating equipment air-supply fume-resisting system.Adopt multizone network analog software CONTAM, be the subordinate of USA National Institute of Standard and Technology (NIST) the exploitation of building fire research laboratory be used for multizone Air Flow and dispersion of pollutants.CONTAM software can be researched and analysed the building smoke control system that pressure air blowing between architectural stair, regional area smoke evacuation or the two are united use.
Totally 39 layers of certain skyscrapers, every aspect is amassed about 2000m
2, floor height 3.5m.Be assumed to be winter, outdoor temperature-15 ℃, pressure 101325Pa ignores the impact of outdoor wind speed, supposes that indoor temperature is 22 ℃.The area of each circulation path is as follows: elevator door size 2.0m * 2.0m, slit area 0.06m
2, the doors of stairwell size 2.0m * 1.6m, slit area 0.0184m
2, window size 1.6m * 1.2m, slit area 0.0361m
2, elevator top smoke vent area 10m
2Fire bed at two layers, the room temperature of supposing to catch fire is 700 ℃, and each door and window is in closed condition during breaking out of fire, and stairwell, elevator well temperature are assumed to be 50 ℃.Institute's emulation mode is stable state, and namely result's temporal evolution not below is the analysis of each condition calculating;
(1) without pressure air blowing
As calculated, it is 9.8kg/s that stairwell calculates ventilation, and it is 74.2kg/s that elevator calculates ventilation, and stairwell, elevator " neutral plane " position are respectively 24 layers, 35 layers of buildings.Therefore, stairwell more than 24 layers air outwards flow, air enters below 24 layers, namely the flue gas that produces of fire bed enter stairwell, can cause the expansion of building fire; Elevator air below 35 layers flows into, and air outwards flows more than 35 layers, and flue gas can enter each floor area, causes building fire to enlarge and reduce the security of floor area.
(2) only stairwell pressurization air-supply
Only to the stairwell pressurization air-supply, the pressure air blowing amount is 40000m
3/ h(" high rule " regulation 36000 ~ 40000m
3/ h), every layer of about 1000m
3/ h.As calculated, " neutral plane " position remains unchanged with institute's calculating location in (1) operating mode substantially at 35 layers in the elevator; Stairwell interior " neutral plane " is below the building bottom, and namely the stairwell air flows out by slits such as door and windows.The doors of stairwell both sides pressure reduction is increased to 150Pa along building height by 35Pa, and namely stair door both sides, upper floor zone pressure reduction has surpassed the pressure reduction of " high rule " regulation 50Pa, and this moment, stair door was opened difficulty, was unfavorable for the personnel escape.
(3) floor area pressure air blowing only
Utilize the hvac equipment air output facing to the above floor area of fire bed, every layer of air output is 7000m
3/ h(can estimate according to rate of ventilation in order to satisfy the calculating air output of human thermal comfort).As calculated, elevator " neutral plane " is promoted to more than the building general height, and namely air or flue gas flow into elevator in the whole solitary building, drain into atmosphere by elevator top exhaust opening, and exhaust smoke level is 84.8kg/s; Stairwell interior " neutral plane " maintains 24 layers, and the calculating ventilation is 12.5kg/s.Changing every layer of air output is 9000m
3/ h, result of calculation shows " neutral plane " still more than building general height, exhaust smoke level is 92.5kg/s; Change elevator top smoke vent area, bring up to 15m
2, result of calculation shows " neutral plane " still more than building general height, exhaust smoke level is 102.8kg/s.
In sum, by the smoke evacuation of elevator top exhaust opening, utilize the hvac equipment pressurization of blowing after the building breaking out of fire, can realize highly being increased to elevator " neutral plane " more than the building general height, thereby stop flue gas to invade floor area, avoid fire further to enlarge.The hvac equipment air output adopts human thermal comfort to calculate air output and can meet the demands, and elevator top smoke vent area is larger with the exhaust smoke level impact on " neutral plane ".
Test unit of the present invention can show intuitively that above-mentioned hvac equipment air-supply is on the impact of flow of flue gas in the elevator.
Claims (5)
1. experimental provision of simulating skyscraper heating and ventilating equipment fume-resisting system, it is characterized in that: it comprises high-order brine tank (3), high-order filtered water tank (23), reserve tank (12) and model of high-rise building (13), high-order filtered water tank (23) bottom connects clear water drainpipe (27), high-order brine tank (3) bottom connects salt solution drainpipe (7), described reserve tank (12) is positioned at high-order brine tank, high-order filtered water tank bottom, reserve tank is made of inner water tank (12-1), outer water tank (12-2), and model of high-rise building (13) is positioned at inner water tank; The floor zone (15) and vertical shaft district (16) that distribute about described model of high-rise building (13) is provided with, floor zone arranges multilayer from high to low, each layer is through clear water impact damper (19), clear water inlet adjusting ball valve (20) is communicated with clear water drainpipe (27), each floor of floor zone is communicated by simulant elevator crack between a door and its frame crack (18) with the vertical shaft district, the model of high-rise building top is communicated with salt solution drainpipe (7) through salt weed buffer (14), top, described vertical shaft district is provided with open top (16-1), the bottom is provided with bottom opening (16-2), and bottom opening is communicated with outer water tank (12-2).
2. the experimental provision of simulation skyscraper heating and ventilating equipment fume-resisting system according to claim 1, it is characterized in that: described experimental provision also is provided with filtered water tank (21) and brine tank (1), filtered water tank is communicated with high-order filtered water tank (23) through clarified water pump (31) and clear water feed pipe (32), and high-order filtered water tank is provided with the clean water overflow pipe (22) that is communicated with filtered water tank; Brine tank (1) is communicated with high-order brine tank (3) through brine pump (11) and salt solution feed pipe (33), and high-order brine tank is provided with the salt solution run-down pipe (2) that is communicated with brine tank.
3. the experimental provision of simulation skyscraper heating and ventilating equipment fume-resisting system according to claim 2 is characterized in that: be provided with successively clear water spinner-type flowmeter inlet ball valve (28), clear water spinner-type flowmeter (29), clear water spinner-type flowmeter vent ball valve (30) on the described clear water drainpipe (27); Be provided with successively salt solution spinner-type flowmeter inlet ball valve (8), salt solution spinner-type flowmeter (9), salt solution spinner-type flowmeter vent ball valve (10) on the described salt solution drainpipe (7).
4. the experimental provision of simulation skyscraper heating and ventilating equipment fume-resisting system according to claim 3, it is characterized in that: described clear water feed pipe (32) is provided with high-order filtered water tank inlet ball valve (24), is communicated with by clear water by-pass pipe (26) and high-order filtered water tank release valve ball (25) between clear water feed pipe (32) and the clear water drainpipe (27); Described salt solution feed pipe (33) is provided with high-order brine tank inlet ball valve (4), is communicated with by salt solution by-pass pipe (6) and high-order brine tank release valve ball (5) between salt solution feed pipe (33) and the salt solution drainpipe (7).
5. the experimental provision of simulation skyscraper heating and ventilating equipment fume-resisting system according to claim 4, it is characterized in that: described vertical shaft district (16) side is provided with altitude scale (17).
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| CN103440810B (en) * | 2013-09-10 | 2016-04-13 | 同济大学建筑设计研究院(集团)有限公司 | For saline experiment simulation system and the using method of building ventilation smoke evacuation experiment |
| CN103439077B (en) * | 2013-09-10 | 2016-06-29 | 同济大学建筑设计研究院(集团)有限公司 | A kind of general release source device for building ventilation smoke evacuation experiment |
| CN106548698A (en) * | 2016-12-07 | 2017-03-29 | 华北电力大学（保定） | The experimental simulation device of smoke evacuation kinestate in a kind of building |
| CN106548698B (en) * | 2016-12-07 | 2018-12-28 | 华北电力大学（保定） | A kind of experimental simulation device of the interior smoke evacuation motion state of building |
| CN109490138A (en) * | 2018-09-26 | 2019-03-19 | 江西理工大学 | A kind of salt-bath scaled model experimental system and measurement method |
| CN109490138B (en) * | 2018-09-26 | 2020-12-08 | 江西理工大学 | Brine model experiment system and measurement method |
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