CN106018467B - A kind of visualization bulk container boiling experimental provision - Google Patents
A kind of visualization bulk container boiling experimental provision Download PDFInfo
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- CN106018467B CN106018467B CN201610477989.4A CN201610477989A CN106018467B CN 106018467 B CN106018467 B CN 106018467B CN 201610477989 A CN201610477989 A CN 201610477989A CN 106018467 B CN106018467 B CN 106018467B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
Abstract
The invention discloses a kind of visualization bulk container experimental provisions, belong to energy field of heat exchange.A kind of visualization bulk container experimental provision of the invention, mainly it is made of bracket, heater strip secured adjusted mechanism, heating water bath mechanism and high-speed camera and scanning electron microscope etc., heater strip secured adjusted mechanism is arranged on bracket, heating water bath mechanism is located at below heater strip secured adjusted mechanism, imitative arm support is provided on bracket, scanning electron microscope is fixed on imitative arm support, acquires experimental data by high-speed camera and scanning electron microscope.The present invention is suitable for any working medium, can observe directly air bubble growth process and various jet effects on heater strip, and can get the diameter of bubble and the relationship of heat flow density on heater strip, to provide theoretical research foundation for research boiling heat transfer problem.
Description
Technical field
The present invention relates to energy technical field of heat exchange, boil more specifically to a kind of visualization bulk container and test dress
It sets.
Background technique
Boiling heat transfer heat is transmitted to liquid from wall surface, the convective heat transfer process for vaporizing liquid boiling.Boiling heat transfer and gas
The generation and disengaging of bubble are closely related, and the condition of bubble formation is: 1. liquid must overheat；2. there is the nucleus of boiling.These
Part is that the dynamic balance and thermal balance by bubble and surrounding liquid are determined.It boils as a kind of efficiently with the heat exchange of phase transformation
Mode is widely present in various heat exchange equipments, such as the water-cooling wall of boiler furnace, the cooler etc. of microelectronics, due to bubbling behaviour
Complex characteristics, it is studied still insufficient, thus greatly limits its application.
There are many factor for influencing boiling heat transfer process, the surface physical properties of property, heating surface including liquid and steam
And degree of roughness, it the particularly important is liquid to wettability of the surface and operating pressure and temperature difference.In nucleateboiling range
Interior, temperature difference is bigger, and individual heat transfer coefficient is also bigger.When heating wall is coarse and can be soaked by liquid, it can also make individual heat transfer coefficient
Increase.Accordingly, fine metal particles are deposited on metal plate or pipe, porous surface metal is made, can make the boiling heat transfer point be
Number improves more than ten times to tens times.And by the research to bubble, heating method, liquid perturbation can be analyzed for boiling
The influence of heat transfer helps speed up the development of boiling heat transfer technology.
By retrieval, discovery has relevant technical solution in the prior art and discloses, such as Chinese Patent Application No.:
201210199702.8, the applying date: on June 18th, 2012, invention and created name are as follows: flow boiling and heat transfer mechanism experiment device and
Method, this application discloses a kind of flow boiling and heat transfer mechanism experiment device and method, including peristaltic pump, spinner flowmeter,
Water bath with thermostatic control, experimental section, outlet experimental section, high-speed camera instrument, ultrasonic wave grain testing apparatus, silicon rubber electric heating sheets, condensation
Device, water tank, data collection system and computer, peristaltic pump pass sequentially through spinner flowmeter and water bath with thermostatic control and experimental section water inlet
Connection, experimental section water outlet passes sequentially through outlet experimental section, condenser connects peristaltic pump water inlet, the silicon rubber of experimental section with water tank
Glue electric heating sheets connect power meter and pressure regulator, are respectively equipped at corresponding experimental section and connect with data collection system and computer
High-speed camera instrument exports and installs ultrasonic wave grain testing apparatus on experimental section.
Above-mentioned application case focuses on research narrow passage boiling heat transfer mechanism, how to control heating method without providing and observes
The information of the generation of bubble, it is difficult to observe various jet effects and cannot effectively control the temperature difference in heating process, also need
It is further improved.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome the air bubble growth process and various of being difficult to directly observe in the prior art on heater strip
The deficiency of jet effect, provides a kind of visualization bulk container experimental provision, and the present invention is suitable for any working medium, can directly see
Air bubble growth process and various jet effects on heater strip are observed, and can get the diameter and heat flow density of bubble on heater strip
Relationship, thus for research boiling heat transfer problem provide theoretical research foundation.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of visualization bulk container experimental provision of the invention is mainly added by bracket, heater strip secured adjusted mechanism, water-bath
The composition such as heat engine structure and high-speed camera and scanning electron microscope, heater strip secured adjusted mechanism are arranged on bracket, and water-bath adds
Heat engine structure is located at below heater strip secured adjusted mechanism, imitative arm support is provided on bracket, scanning electron microscope is fixed on imitative arm branch
On frame, experimental data is acquired by high-speed camera and scanning electron microscope.
As further improvement of the present invention, the heating water bath mechanism includes heating bath, boiling pool and heated mould
Block, heating module are used to heat the fluid heat transfer working medium in heating bath, and heating bath is by fluid heat transfer working medium to being placed on it
Internal boiling pool heating, the boiling pool heater strip in heater strip secured adjusted mechanism be placed in the distilled water in boiling pool into
Row experiment.
As further improvement of the present invention, the heating module includes that heating power supply, power supply support plate and heat supply add
Heated filament, the heating power supply and heat supply heater strip are separately positioned on the upper and lower two sides of power supply support plate, and power supply support plate, which is placed on, to be added
On hot pond, it is that fluid heat transfer working medium heats that heating power supply, which controls the fever of heat supply heater strip,.
As further improvement of the present invention, the heating bath, boiling pool are made of transparent PC material.
As further improvement of the present invention, the imitative arm support is to increase steady holder, and scanning electron microscope has in imitative arm support
There is multiple directions freedom of motion.
As further improvement of the present invention, heater strip secured adjusted mechanism includes heater strip regulating mechanism and adds
Heated filament fixed mechanism, wherein heater strip regulating mechanism is mainly by experimental bench apical ring, lift strut fixed frame and lift strut group
Be arranged radially at, lift strut fixed frame along the experimental bench apical ring of pedestal upper end and can around experimental bench apical ring central axis rotation,
The lift strut is movably arranged on lift strut fixed frame lower part, and can control heater strip fixed mechanism by lift strut
It moves up and down.
As further improvement of the present invention, rotation, lifting of the lift strut fixed frame in experimental bench apical ring
The sliding of strut OQ t strut fixed frame and the elevating movement of lift strut by corresponding motor driving mechanisms control, and
The movement of three motors is controlled by control system.
As further improvement of the present invention, the heater strip fixed mechanism in heater strip secured adjusted mechanism is main
It is made of heater strip fixed frame and strut, heater strip fixed frame upper end is connected with heater strip regulating mechanism, and two strut settings exist
The lower end of heater strip fixed frame forms Y-shaped structure, and the other end of strut is equipped with fixed rotation chain, simultaneously by two fixed rotation chain links
Strut boiling pool heater strip.
As further improvement of the present invention, one end that strut is connected with heater strip fixed frame is provided with gear, leads to
Cross the subtended angle between the intermeshing control strut of two gears.
As further improvement of the present invention, the bracket is mainly made of table base and experimental bench pillar, until
Few experimental bench apical ring of two experimental bench pillars in the circumferentially-spaced distribution of table base, heater strip secured adjusted mechanism is solid
It is scheduled on experimental bench pillar top, imitative arm support is fixed on experimental bench lower rod end.
A kind of experimental method of visualization bulk container experimental provision of the invention, the specific steps are that:
1) preparation before testing:
Suitable distilled water is added in boiling pool before experiment every time, heat-exchange working medium is added in heating bath, by boiling pool
Heater strip is fixed on fixed rotation chain, and boiling pool heater strip is adjusted level by gear, is adjusted by heater strip regulating mechanism
Position of the boiling pool heater strip in boiling pool；
2) start experimental provision:
According to the heating gear of liquid level selection heating power supply in heating bath, heated at constant temperature makes the temperature of distilled water in boiling pool
Degree is setting value, connects direct current on boiling pool heater strip；
3) information is collected:
The position and angle for adjusting scanning electron microscope and high-speed camera on imitative arm support, record experimental phenomena；
4) operating condition I is adjusted:
When the temperature of distilled water in boiling pool reaches setting value, heating power supply is closed, adjusts the straight of boiling pool heater strip
Current switch on galvanic electricity source, changes size of current, and bubble phenomenon in the case of difference heat flow density when obtaining same degree of supercooling is protected
File is deposited, data are recorded；
5) operating condition II is adjusted:
The current switch on the DC power supply of boiling pool heater strip is adjusted, so that its electric current, voltage is maintained a definite value, then
Heating power supply is adjusted, various bubble phenomenons when obtaining same heat flow density in the case of difference degree of supercooling save file, record number
According to；
6) Data Processing in Experiment:
After experimental data acquires, four kinds for observing bubble on boiling pool heater strip mop up phenomenon and bubble roof jet stream
Phenomenon estimates bubble diameter according to scanning electron microscope resolution grid and boiling pool heater strip diameter.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
(1) a kind of visualization bulk container experimental provision of the invention, is provided with heater strip secured adjusted mechanism, facilitates adjusting
The position of boiling pool heater strip, the high-speed camera being equipped with can shoot bubble on boiling pool heater strip and mop up, merge, take off
From phenomenon；Set scanning electron microscope can shoot bubble departure diameter size, frequency and jet effect on boiling pool heater strip, obtain
Must boil the diameter of bubble and the relationship of heat flow density on heater strip, to provide theoretical research for research boiling heat transfer problem
Basis；
(2) a kind of visualization bulk container experimental provision of the invention, is provided with heating bath and boiling pool, passes through heating bath pair
Boiling pool is heated, i.e., boiling pool is placed in heating bath, boiling pool half in water, half in air, using adding
The water ebuillition of heated pond of the lower part Re Chi, water temperature slowly rises and uniformity of temperature profile in boiling pool, eliminates due to boiling in water
The influence to bubble is formed on heater strip is disturbed, convenient for doing the experiment under various degree of supercooling operating conditions；
(3) a kind of visualization bulk container experimental provision of the invention, experimental bench apical ring, lifting in heater strip regulating mechanism
Combination between strut fixed frame and lift strut can be achieved, rotate, translating and elevating movement, then can both be boiled with Level tune
Heater strip position, and boiling heater strip height can be adjusted, facilitate experiment to adjust, obtain preferable experimental site, convenient for observation；
(4) the same of heater strip fixed frame is arranged in a kind of visualization bulk container experimental provision of the invention, two struts
End forms Y-shaped structure, and the subtended angle of strut can be adjusted by gear, can easily be accommodated the rate of tension of boiling heater strip, is located at water
Prosposition is set, and is obtained more accurately as a result, reasonable in design, and principle is simple, convenient for promoting the use of.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of visualization bulk container experimental provision of the invention；
Fig. 2 is the structural schematic diagram of heating module in the present invention；
Fig. 3 is the structural schematic diagram of heater strip fixed mechanism in the present invention；
Fig. 4 mops up phenomenon schematic diagram for four kinds on the heater strip that boils in the present invention；
Fig. 5 is jet effect schematic diagram on the heater strip that boils in the present invention；
Fig. 6 is the boiling heater strip of scanning electron microscope observation and the scale diagrams of bubble in the present invention.
Label declaration in schematic diagram: 1, table base；2, heating bath；3, experimental bench pillar；4, heating power supply；5, real
Test platform apical ring；6, lift strut fixed frame；7, lift strut；8, heater strip fixed frame；9, boiling pool；10, high-speed camera；
11, scanning electron microscope；12, arm support is imitated；13, heat supply heater strip；14, gear；15, strut；16, fixed rotation chain；17, boiling pool adds
Heated filament.
Specific embodiment
To further appreciate that the contents of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
In conjunction with Fig. 1, a kind of visualization bulk container experimental provision of the present embodiment, mainly by bracket, heater strip secured adjusted
The composition such as mechanism, heating water bath mechanism, high-speed camera 10 and scanning electron microscope 11, heater strip secured adjusted mechanism includes heater strip
Regulating mechanism and heater strip fixed mechanism, heater strip regulating mechanism are connected with bracket, solid for horizontal or vertical adjusting heater strip
Determine regulating mechanism.Heating water bath mechanism is located at below heater strip secured adjusted mechanism, the boiling heating on heater strip fixed mechanism
Silk 17 carries out Heating Experiment in heating water bath mechanism.
Bracket in the present embodiment is mainly made of table base 1 and experimental bench pillar 3, and 3 experimental bench pillars 3 are along reality
It tests platform pedestal 1 to be circumferentially evenly spaced on, 3 lower end of experimental bench pillar is provided with imitative arm support 12, and scanning electron microscope 11 is fixed on imitative
On arm support 12, experimental data is acquired by high-speed camera 10 and scanning electron microscope 11.
Further, imitating arm support 12 is to increase steady holder, and scanning electron microscope 11 has multiple directions fortune on imitative arm support 12
Dynamic freedom degree, can adjust or be observed angular adjustment with Level tune or vertically, easy to use, can obtain preferable experiment
Position, convenient for observation.
Heating water bath mechanism in the present embodiment includes heating bath 2, boiling pool 9 and heating module, heating module for pair
Fluid heat transfer working medium heating in heating bath 2, heating bath 2 are arranged in table base 1, and boiling pool 9 is placed on heating bath 2
It is heated in fluid heat transfer working medium, heating bath 2 heats distilled water in boiling pool 9 by fluid heat transfer working medium, and heater strip is fixed to be adjusted
It is tested in the distilled water that boiling pool heater strip 17 in section mechanism is placed in boiling pool 9.
As shown in Fig. 2, heating module includes heating power supply 4, power supply support plate and heat supply heater strip 13, heating power supply 4 is set
It sets on the upside of power supply support plate, heat supply heater strip 13 is arranged on the downside of power supply support plate, and heating power supply 4 is that heat supply heater strip 13 mentions
For electric energy heat production, heat supply heater strip 13 can be set to the circular resistance wire of multi-turn, to improve heat production efficiency.Power supply support plate is put
It sets on heating bath 2, then heat supply heater strip 13 is located in heating bath 2, and it is fluid that heating power supply 4, which controls the fever of heat supply heater strip 13,
Heat-exchange working medium heating.Heating bath 2 cuboid structure can be set as, then heating module can be placed in 2 side of heating bath, it is another
Side is for placing boiling pool 9.
It is worth noting that as shown in Fig. 2, heat supply heater strip 13 is connect by the mounting racks of two sides with heating power supply 4, or
Person is directly connected with support plate, and two circle heat supply heater strip 13 up and down is provided on same mounting rack.Further, for convenience
The fluid heat transfer working medium of different liquid levels is heated, different heating efficiencies is provided, the left and right sides two groups of heat supplies of setting is divided to add
Heated filament 13, the location of two groups of heat supply heater strips 13 height are different.When liquid level is lower, lower height can be directly used
Heat supply heater strip 13 is heated；When liquid level is higher, two groups are opened simultaneously, then can be heated in different height, heating effect
Rate is high, and uniformity of temperature profile, facilitates the uniformity of Temperature Distribution in boiling pool 9.
In order to be observed by high-speed camera 10 and scanning electron microscope 11, heating bath 2 and boiling pool 9 are transparent
Material material is selected as using transparent PC material in the present embodiment.The PC strength of materials is preferable, is resistant to 150 DEG C of temperature, and transparency is very high,
Observation and needs of taking pictures can be met.
Due to being heated by heating bath 2 to boiling pool 9, half heating water bath is formed, i.e., boiling pool 9 is placed on heating
In pond 2, in water, half in air, utilizes the water ebuillition of heated pond 9 of 2 lower part of heating bath, 9 water of boiling pool to boiling pool half
Warm slowly rising and uniformity of temperature profile eliminate due to influence of the boiling disturbance to bubble is formed on heater strip in water, are convenient for
Do the experiment under various degree of supercooling operating conditions.
Embodiment 2
A kind of visualization bulk container experimental provision of the present embodiment, basic structure is same as Example 1, difference
Be: heater strip regulating mechanism is mainly by experimental bench apical ring 5, lift strut fixed frame 6 and 7 groups of lift strut in the present embodiment
At.Wherein, experimental bench apical ring 5 is fixed on 3 top of experimental bench pillar, and level is fixed, offers annular in 5 inner wall of experimental bench apical ring
Slot, lift strut fixed frame 6 are arranged radially along the experimental bench apical ring 5 of pedestal upper end, and the both ends of lift strut fixed frame 6 are located at ring
In shape slot, then lift strut fixed frame 6 can also can radially be set around 5 central axis rotation of experimental bench apical ring, lift strut fixed frame 6
It sets above experimental bench apical ring 5, main purpose is to realize rotation, and specific structure is not particularly limited.
In addition, offering T-slot in 6 lower wall of lift strut fixed frame, 7 upper end of lift strut is correspondingly arranged on the connection of T shape
Block then slides manually 7 OQ t strut fixed frame 6 of lift strut.It is possible to further under lift strut fixed frame 6
Rack gear is set outside wall, fixed motor is cooperated on lift strut 7, then can be slided by motor control lift strut 7.Lift strut
7 are able to carry out telescopic variation, and driving method can be manually or electrically, be not specifically limited.Heater strip fixed mechanism is connected
It connects in 7 lower end of lift strut, then not only can be with Level tune heater strip fixed mechanism position, but also heater strip fixed mechanism can be adjusted
Highly, and then control to 17 position of boiling pool heater strip is realized.
Experimental bench apical ring, lift strut fixed frame in heater strip regulating mechanism and the combination between lift strut can be real
Now, rotation, translation and elevating movement, then can not only be boiled heater strip position with Level tune, but also can adjust boiling heater strip height
Degree facilitates experiment to adjust, obtains preferable experimental site, convenient for observation.
Embodiment 3
Set Fig. 3, a kind of visualization bulk container experimental provision of the present embodiment, basic structure is same as Example 2,
The difference is that: the heater strip fixed mechanism in heater strip secured adjusted mechanism is mainly by heater strip fixed frame 8 and strut 15
Composition, 8 upper end of heater strip fixed frame are fixedly connected with lift strut 7, and two struts 15 are arranged under heater strip fixed frame 8
End, heater strip fixed frame 8 and two struts 15 form Y-shaped structure, and the upper opening of Y-shaped structure is for fixing boiling pool heater strip
17, and the opening angle of Y-shaped structure is adjustable, is suitble to the boiling pool heater strip of fixed different-diameter and length, and is convenient for handle
Boiling pool heater strip is adjusted to horizontality.
The other end of strut 15 is equipped with fixed rotation chain 16, is connected by two fixed rotation chains 16 and struts boiling pool heater strip
17.In addition, also rubber case can be set in the junction of fixed rotation chain 16 and boiling pool heater strip 17, i.e., fixed rotation chain 16 and boiling
It rises and is connected between pond heater strip 17 by rubber case, guarantee it with certain relaxation, it is easier to adjust horizontal.
During adjusting boiling pool heater strip, since boiling pool heater strip is rigid, it is sometimes desirable to biggish tensioning
Power guarantees that it is in horizontality, if strut 15 is highly susceptible to boiling pool heater strip 17 simply by articulated connection
Tension influences and return, and boiling pool heater strip 17 is caused to bend and can not be tested.In view of the above-mentioned problems, in strut 15 and adding
The connected one end of heated filament fixed frame 8 is provided with gear 14, and gear 14 is fixedly connected with strut 15, and the shaft of gear 14 is fixed
On heater strip fixed frame 8, the subtended angle between the intermeshing control strut 15 of two gears 14 can be passed through.
Above structure setting is easier to adjust, because angular displacement is identical when the engagement of two identical gears, two struts 15
Oscillating quantity it is identical always, then after turning an angle, the vertical shift amount of fixed rotation chain 16 is identical, after guaranteeing adjustment
Boiling pool heater strip 17 is in horizontality always, easy to use.DC circuit electric wire and electric current, voltage measurement in the present embodiment
Route passes through inside heater strip lift strut 7, and connect by fixed rotation chain 16 with boiling pool heater strip 17.And it is specific
Experimental record equipment can directly adopt the prior art, the present embodiment can not be described specifically.
Embodiment 4
A kind of visualization bulk container experimental provision of the present embodiment, basic structure is same as Example 3, difference
Be: rotation of the lift strut fixed frame 6 in experimental bench apical ring 5,7 OQ t strut of lift strut are solid in the present embodiment
The sliding of frame 6 and the elevating movement of lift strut 7 are determined by corresponding motor driving mechanisms control, and are controlled by control system
The movement of three motors replaces manually controlling using mechanization control, and accuracy is higher, and can avoid being scalded in operating process
The danger such as wound.Conventional driving method can be used in used driving mechanism, does not need to repeat.
Table base 1, heating bath 2, experimental bench pillar 3, heating power supply 4, experimental bench apical ring 5, lift strut fixed frame
6, lift strut 7, heater strip fixed frame 8, boiling pool 9, high-speed camera 10, scanning electron microscope 11, imitative arm support 12, heat supply heating
Silk 13, gear 14, strut 15, fixed rotation chain 16, boiling pool heater strip 17.
It can be combined with each other between the above various embodiments different characteristic, be not limited to cited scheme.For above-mentioned implementation
The visualization bulk container experimental provision that example provides, the present invention also provides a kind of experiment sides for visualizing bulk container experimental provision
Method, the specific steps are that:
1) preparation before testing:
Suitable distilled water is added in boiling pool 9 before experiment every time, heat-exchange working medium is added in heating bath, by boiling pool
Heater strip 17 is fixed on fixed rotation chain 16, and boiling pool heater strip 17 is adjusted level by gear 14, solid by lift strut
Determine frame 6, lift strut 7 adjusts position of the boiling pool heater strip 17 in boiling pool 9；And boiling pool heater strip 17 is made to be in level
State.The heat-exchange working medium is fluid heat transfer working medium, such as the nano-fluid, propane, iso-butane of water, metal or non-metallic particle
Boiling heat transfer situation Deng, different working medium is different, and the present apparatus can realize the boiling heat transfer research to a variety of heat-exchange working mediums.
2) start experimental provision:
Single heat supply can only be started if liquid level is lower according to the heating gear of liquid level selection heating power supply 4 in heating bath 2
Heater strip 13 is heated；If liquid level is higher, two groups of heat supply heater strips 13 can be started simultaneously while being heated；Temperature in heating bath 2
Lasting to rise, temperature also will be slow raising in boiling pool 9, until temperature reaches required temperature in boiling pool 9, then start constant temperature
Ebuillition of heated pond can be tested so that the working medium of boiling pool has certain degree of superheat or degree of supercooling.
During heating, using intermittent heat mode, when the temperature difference meets or exceeds 20 DEG C, stopping heating being powered off,
Etc. temperature differential closely within 5 DEG C of ranges when be further continued for being heated.Water in fluid heat transfer working medium on the one hand can be reduced in this way
Evaporation, on the other hand can reduce the loss of electric energy.
In addition, can also add a lid in boiling pool 9 when heated, the evaporation rate of distilled water and the damage of heat are reduced
It loses；After the temperature of distilled water in boiling pool 9 is setting value, continuous heating for a period of time, excludes water institute itself with non-condensing gas
Body, then connecting direct current on boiling pool heater strip 17 can be tested.
3) information is collected:
The position and angle for adjusting scanning electron microscope 11 and high-speed camera 10 on imitative arm support 12, record experimental phenomena.
High-speed camera 10 is fixed with tripod, sets the height of high-speed camera 10 and away from boiling pool heater strip 17
Distance, later carry out light-inletting quantity and focal length debugging.It should be noted that high-speed camera 10 cannot be heated apart from boiling pool
Silk 17 is too close, prevents vapor from influencing experiment effect, or even damage high-speed camera 10.Scanning electron microscope 11 is by imitating arm support
12 setting good positions and angle acquire observation information in experiment.
Scanning electron microscope 11 is high for shooting bubble departure diameter size, frequency and jet effect on boiling pool heater strip 17
Fast video camera 10 for shoot bubble on boiling pool heater strip 17 mop up, merge, break-off.
4) operating condition I is adjusted:
When the temperature of distilled water in boiling pool 9 reaches setting value, heating power supply 4 is closed, adjusts boiling pool heater strip 17
DC power supply on current switch, change size of current, bubble is existing in the case of difference heat flow density when obtaining same degree of supercooling
As saving file, recording data；
Its process is first to adjust direct current power source voltage electric current, and making it is all zero, then opens DC power supply switch, first gradually
Increase voltage to sufficiently large, electric current remains zero, then gradually adjustment electric current is carried out more accurate to suitable position using vernier knob
Adjusting.Data collection can be carried out using high speed camera 10 or scanning electron microscope 11 when needing, and record all data.
5) operating condition II is adjusted:
The current switch on the DC power supply of boiling pool heater strip 17 is adjusted, so that its electric current, voltage is maintained a definite value, so
Adjustment heating power supply 4 changes temperature afterwards, and various bubble phenomenons when obtaining same heat flow density in the case of difference degree of supercooling save
File records data；
When all experiments are all finished, first have to close heating power supply 4 and DC power supply switch, then by boiling pool
Heater strip 17 rises, and arranges experimental bench (water temperature is higher at this time, with burn prevention), need to will be boiled with lid when not having to distilled water temporarily
Pond closing, in case air impact distills water quality.If necessary to distilled water be needed to change, because in experimentation when repeatedly testing
It will affect the purity of distilled water, to influence experimental result.
Further, the boiling pool heater strip of also replaceable different-diameter either heat-exchange working medium, repeat the above steps examination
It tests, studies the boiling heat transfer situation under different boiling pool heater strips and heat-exchange working medium.
First DC power supply must be powered off when replacing boiling pool heater strip 17, with anti-tamper boiling pool heater strip 17, then made
Boiling pool heater strip 17 is risen with heater strip lift strut 7, changes other heater strips into.
6) Data Processing in Experiment:
After experimental data acquires, four kinds for observing bubble on boiling pool heater strip 17 mop up phenomenon and bubble roof is penetrated
Flow phenomenon, as shown in figure 4, it includes: that Moving Bubble is reciprocal between two static bubbles that four kinds, which are mopped up phenomenon, on boiling pool heater strip
It mops up, two bubbles move toward one another, two bubbles move in the same direction and a bubble motion and after bumping against with second static bubble
The phenomenon that moving together.
As shown in Figure 5, bubble roof jet effect includes: to penetrate to bottom one-jet, to top one-jet, to top more
Flow phenomenon；When being observed using scanning electron microscope, as shown in fig. 6, being heated according to scanning electron microscope resolution grid and boiling pool
Silk diameter estimates bubble diameter.
Experimental method of the invention is provided with heater strip secured adjusted mechanism, facilitates the position for adjusting boiling pool heater strip,
The high-speed camera being equipped with, can shoot bubble on boiling pool heater strip mop up, merge, break-off；Set scanning electricity
Mirror can shoot bubble departure diameter size, frequency and jet effect on boiling pool heater strip, obtain bubble on boiling heater strip
Diameter and heat flow density relationship, thus for research boiling heat transfer problem provide theoretical research foundation.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (9)
- The experimental provision 1. a kind of visualization bulk container boils, including bracket, heater strip secured adjusted mechanism, heating water bath mechanism and High-speed camera (10), it is characterised in that: further include scanning electron microscope (11), heater strip secured adjusted mechanism is arranged in bracket On, heating water bath mechanism is located at below heater strip secured adjusted mechanism, and imitative arm support (12), scanning electron microscope are provided on bracket (11) it is fixed on imitative arm support (12), experimental data is acquired by high-speed camera (10) and scanning electron microscope (11)；It is described to add Heated filament secured adjusted mechanism includes heater strip regulating mechanism and heater strip fixed mechanism, wherein heater strip regulating mechanism mainly by Experimental bench apical ring (5), lift strut fixed frame (6) and lift strut (7) composition, in experimental bench apical ring (5), inner wall offers ring The both ends of shape slot, lift strut fixed frame (6) are located in annular groove, experimental bench of the lift strut fixed frame (6) along pedestal upper end Apical ring (5) is arranged radially and can be movably arranged on lifting around experimental bench apical ring (5) central axis rotation, the lift strut (7) Strut fixed frame (6) lower part, and heater strip fixed mechanism can be controlled by lift strut (7) and moved up and down.
- The experimental provision 2. a kind of visualization bulk container according to claim 1 boils, it is characterised in that: the water-bath adds Heat engine structure includes heating bath (2), boiling pool (9) and heating module, and heating module is used for the fluid heat transfer work in heating bath (2) Matter heating, heating bath (2) heat the boiling pool (9) placed inside it by fluid heat transfer working medium, heater strip secured adjusted It is tested in the distilled water that boiling pool heater strip (17) in mechanism is placed in boiling pool (9).
- The experimental provision 3. a kind of visualization bulk container according to claim 2 boils, it is characterised in that: the heating module Including heating power supply (4), power supply support plate and heat supply heater strip (13), the heating power supply (4) and heat supply heater strip (13) point It She Zhi not be placed on heating bath (2) in the upper and lower two sides of power supply support plate, power supply support plate, heating power supply (4) control heat supply adds Heated filament (13) fever is that fluid heat transfer working medium heats.
- The experimental provision 4. a kind of visualization bulk container according to claim 2 boils, it is characterised in that: the heating bath (2), boiling pool (9) is made of transparent PC material.
- The experimental provision 5. a kind of visualization bulk container according to claim 1 boils, it is characterised in that: the imitative arm support (12) to increase steady holder, scanning electron microscope (11) has multiple directions freedom of motion in imitative arm support (12).
- The experimental provision 6. a kind of visualization bulk container according to claim 5 boils, it is characterised in that: the lift strut Rotation of the fixed frame (6) in experimental bench apical ring (5), the sliding of lift strut (7) OQ t strut fixed frame (6) and liter The elevating movement of descending branch bar (7) passes through the movement of control system three motors of control by corresponding motor driving mechanisms control.
- The experimental provision 7. a kind of visualization bulk container according to any one of claims 1 to 5 boils, it is characterised in that: Heater strip fixed mechanism in heater strip secured adjusted mechanism is mainly made of heater strip fixed frame (8) and strut (15), Heater strip fixed frame (8) upper end is connected with heater strip regulating mechanism, and two struts (15) are arranged under heater strip fixed frame (8) End forms Y-shaped structure, and the other end of strut (15) is equipped with fixed rotation chain (16), connects and struts by two fixed rotations chain (16) Boiling pool heater strip (17).
- The experimental provision 8. a kind of visualization bulk container according to claim 7 boils, it is characterised in that: strut (15) with The connected one end of heater strip fixed frame (8) is provided with gear (14), controls strut by the intermeshing of two gears (14) (15) subtended angle between.
- The experimental provision 9. a kind of visualization bulk container according to claim 1 boils, it is characterised in that: the bracket is main It is made of table base (1) and experimental bench pillar (3), at least two experimental bench pillars (3) are between table base (1) circumferential direction It is fixed on experimental bench pillar (3) top every the experimental bench apical ring (5) in distribution, heater strip secured adjusted mechanism, imitates arm support (12) it is fixed on experimental bench pillar (3) lower end.
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| CN107154205B (en) * | 2017-07-13 | 2022-10-28 | 安徽工业大学 | Angle-tunable container boiling heat exchange experimental device and experimental method |
| CN107328811A (en) * | 2017-08-28 | 2017-11-07 | 重庆科技学院 | A kind of burnt melting crystal stove of high temperature copolymerization and its temperature measuring apparatus |
| CN110470695A (en) * | 2019-08-29 | 2019-11-19 | 哈尔滨工程大学 | A kind of bulk container boiling experimental system |
| CN113218990B (en) * | 2021-04-20 | 2022-05-13 | 江苏科技大学 | Visual pool boiling experiment system and working method thereof |
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| CN101865864A (en) * | 2010-06-08 | 2010-10-20 | 华东理工大学 | System for testing phase transformation cooling effect of electronic components |
| CN103454297A (en) * | 2013-09-02 | 2013-12-18 | 武汉钢铁(集团)公司 | Method for identifying steel plate coating defect caused by coating liquid bubbles |
| CN205720069U (en) * | 2016-06-24 | 2016-11-23 | 安徽工业大学 | A kind of visualization bulk container boiling experimental provision |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101865864A (en) * | 2010-06-08 | 2010-10-20 | 华东理工大学 | System for testing phase transformation cooling effect of electronic components |
| CN103454297A (en) * | 2013-09-02 | 2013-12-18 | 武汉钢铁(集团)公司 | Method for identifying steel plate coating defect caused by coating liquid bubbles |
| CN205720069U (en) * | 2016-06-24 | 2016-11-23 | 安徽工业大学 | A kind of visualization bulk container boiling experimental provision |
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