CN207182748U - A kind of humorous container boiling heat transfer experimental provision of adjustable angle - Google Patents
A kind of humorous container boiling heat transfer experimental provision of adjustable angle Download PDFInfo
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- CN207182748U CN207182748U CN201720849363.1U CN201720849363U CN207182748U CN 207182748 U CN207182748 U CN 207182748U CN 201720849363 U CN201720849363 U CN 201720849363U CN 207182748 U CN207182748 U CN 207182748U
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Abstract
A kind of humorous container boiling heat transfer experimental provision of adjustable angle of the present utility model, belongs to energy field of heat exchange.The utility model includes support, heater strip secured adjusted mechanism, heating water bath mechanism, high-speed camera and ESEM, fixed mechanism in described heater strip secured adjusted mechanism is mainly made up of angulation piece, chute and boiling heater strip, angulation piece is semi-circular shape, its middle part is connected with heater strip fixed mount, chute is symmetrically offered on angulation piece, the end of the boiling heater strip is fixed in chute by adjusting screw, and the angle of inclination of boiling heater strip is adjusted by adjusting screw.The utility model can observe directly air bubble growth process and various jet effects on heater strip, and can simultaneously research level and tilt etc. different situations, the relation of the diameter of bubble and heat flow density on heater strip can be obtained, so as to provide theoretical research foundation for research boiling heat transfer problem.
Description
Technical field
Energy technical field of heat exchange is the utility model is related to, is boiled more specifically to a kind of humorous container of adjustable angle
Rise local heat transfer device and experimental method.
Background technology
Boiling heat transfer heat is transmitted to liquid from wall, the convection heat transfer' heat-transfer by convection 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 dynamic balance by bubble and surrounding liquid and thermal balance are determined.Seethe with excitement as a kind of efficient heat exchange with phase transformation
Mode is widely present in various heat transmission equipments, such as the water-cooling wall of boiler furnace, the cooler of microelectronics etc., due to bubbling behaviour
Complex characteristics, it is studied still insufficient, thus greatly limit its application.
It is many to influence the factor of boiling heat transfer process, including the property of liquid and steam, the surface physical properties of heating surface
And degree of roughness, liquid is the particularly important is to wettability of the surface and operating pressure and temperature difference.In nucleateboiling scope
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 metallic 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, mode of heating, liquid perturbation can be analyzed for boiling
The influence of heat transfer, help speed up the development of boiling heat transfer technology.
Existing related technical scheme discloses in the prior art, and this programme applicant once declared on June 24th, 2016
Similar art solutions, number of patent application：201610477989.4 patent name：One kind visualization bulk container boiling is real
Experiment device, this application case disclose a kind of visualization bulk container experimental provision, belong to energy field of heat exchange.The device is mainly by propping up
The composition such as frame, heater strip secured adjusted mechanism, heating water bath mechanism and high-speed camera and ESEM, the heater strip are fixed
Governor motion is arranged on support, and heating water bath mechanism is located at below heater strip secured adjusted mechanism, is provided with support imitative
Arm support, ESEM are fixed on imitative arm support, and experimental data is gathered by high-speed camera and ESEM.
Above-mentioned application case can observe directly air bubble growth process and various jet effects on heater strip, and can be added
The relation of the diameter of bubble and heat flow density on heated filament, but pass through and also suffer from the shadow of the factors such as gravity using discovery, bubble
Ring, and what this experimental provision can not complete detection gravity is to influence experiment, it is necessary to further improve.
Utility model content
1. utility model technical problems to be solved
The purpose of this utility model be to overcome in the prior art experimental provision can not observed gravity on bubble formation influence
Deficiency, there is provided a kind of humorous container boiling heat transfer experimental provision of adjustable angle, the utility model are applied to any working medium, energy
Enough observe directly air bubble growth process and various jet effects on heater strip, and research level and the difference such as can tilt simultaneously
Situation, the relation of the diameter of bubble and heat flow density on heater strip can be obtained, so as to provide reason for research boiling heat transfer problem
By Research foundation.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the invention is：
A kind of humorous container boiling heat transfer experimental provision of adjustable angle of the invention, including support, heater strip secured adjusted
Mechanism, heating water bath mechanism, high-speed camera and ESEM, the fixed mechanism master in described heater strip secured adjusted mechanism
To be made up of angulation piece, chute and boiling heater strip, angulation piece is semi-circular shape, and its middle part is connected with heater strip fixed mount,
Chute is symmetrically offered on angulation piece, the end of the boiling heater strip is fixed in chute by adjusting screw, passes through regulation
The angle of inclination of screw regulation boiling heater strip.
As further improvement of the present invention, the concave arc in angulation piece is stretched out in the bottom of described heater strip fixed mount
Interior, its bottom is connected with boiling heater strip, boiling heater strip is divided into two parts.
As further improvement of the present invention, the heater strip fixed mount bottom is provided with two cards being connected with wire
Two boiling heater strips are drawn in seat, heater strip fixed mount bottom, and the boiling heater strip one end is connected with deck, the other end and regulation
Screw is connected, and forms two loops.
As further improvement of the present invention, two and half bare conductors are symmetrically arranged with the angulation piece, the semi-nudity is led
Line is circular arc, and radius size is less than the radius size of chute.
As further improvement of the present invention, graduation mark is carved with the angulation piece, edge of the graduation mark along chute
Set.
As further improvement of the present invention, support, heater strip secured adjusted mechanism in device, heating water bath mechanism
It is connected, the heater strip secured adjusted mechanism is arranged on support, and heating water bath mechanism is located at heater strip secured adjusted mechanism
Lower section, imitative arm support is provided with support, ESEM is fixed on imitative arm support, passes through high-speed camera and ESEM
Gather experimental data.
As further improvement of the present invention, the governor motion in heater strip secured adjusted mechanism is mainly by experimental bench top
Ring, lift strut fixed mount and lift strut composition, experimental bench apical ring of the lift strut fixed mount along pedestal upper end are radially arranged
And can be around experimental bench apical ring central axis, the lift strut is movably arranged on lift strut fixed mount bottom, and can
Heater strip fixed mechanism is controlled to move up and down by lift strut.
As further improvement of the present invention, described heating water bath mechanism includes heating bath, boiling pool and heated mould
Block, heating module are used to heat the liquid heat exchange working medium in heating bath, and heating bath is by liquid heat exchange working medium to being placed on it
Internal boiling pool is heated, and the boiling heater strip in heater strip secured adjusted mechanism, which is placed in the distilled water in boiling pool, to be carried out
Experiment.
A kind of humorous container boiling heat transfer experimental method of adjustable angle of the invention, seethed with excitement using the humorous container of adjustable angle
Local heat transfer device is tested, and its step is：
1) preparation before testing：
Appropriate distilled water is added in boiling pool before experiment every time, heat-exchange working medium is added in heating bath, boiling is added
Heated filament is fixed on angulation piece with adjusting screw, and boiling heater strip is in contact with half bare conductor, the angle of regulation boiling heater strip；
2) experimental provision is started：
According to the heating gear of liquid level selection heating power supply in heating bath, heated at constant temperature boiling pool, make to distill in boiling pool
The temperature of water is setting value, connects direct current on boiling heater strip；
3) information：
The position and angle of ESEM and high-speed camera, record experimental phenomena on the imitative arm support of regulation；
4) operating mode I is adjusted：
Suitable angle is selected, when the temperature of distilled water in boiling pool reaches setting value, closes heating power supply, adjustment boiling
Rise the current switch on the dc source of heater strip, change size of current, obtain same position, difference hot-fluid during same degree of supercooling
Density case bubble phenomenon, preserve file, record data；
5) operating mode II is adjusted：
Suitable angle is selected, adjusts the current switch on the dc source of boiling heater strip, maintains its electric current, voltage
One definite value, then adjusts heating power supply, obtains same position, various gas during same heat flow density in the case of difference degree of supercooling
Phenomenon is steeped, preserves file, record data；
6) operating mode III is adjusted：
When the temperature of distilled water in boiling pool reaches setting value, heating power supply, the direct current of adjustment boiling heater strip are closed
Current switch on power supply, its electric current, voltage is maintained a definite value, the angle of regulation boiling heater strip, tested, obtained
The various bubble phenomenons of different angle during same heat flow density in the case of same degree of supercooling, preserve file, record data；
7) Data Processing in Experiment：
After experimental data collection terminates, observe bubble on boiling pool heater strip four kinds mop up phenomenon and bubble roof jet
Phenomenon, bubble diameter is estimated according to ESEM resolution grid and boiling pool heater strip diameter.
3. beneficial effect
Using technical scheme provided by the utility model, compared with prior art, have the advantages that：
(1) the experimental bench apical ring in the utility model in heater strip governor motion, lift strut fixed mount, lift strut and
Combination between angulation piece can be achieved：Rotation, translation and elevating movement, and adjusting screw can be passed through and adjust boiling heater strip
Position, change its angle of inclination, then boiling heater strip position, shadow of the observed gravity to bubble formation can be both adjusted with different angle
Ring, and can enough adjusts boiling heater strip height, convenient experiment adjustment, obtains preferable experimental site, is easy to observe；
(2) the utility model moves the boiling heater strip of fixed a certain angle by screw in slotted eye, and is consolidated with heater strip
Determine frame and boiling heater strip is divided into two parts, can not only adjust the boiling heater strip of different angle, obtain accurately knot
Fruit, left and right contrast can also be carried out, so as to mitigate experimental implementation amount, intuitively obtain more accurate result；
(3) the utility model is heated by heating bath to boiling pool, i.e., boiling pool is placed in heating bath, boiling
Pond half in water, half in atmosphere, using the water ebuillition of heated pond of heating bath bottom, in boiling pool water temperature slowly rise and
Uniformity of temperature profile, eliminate due to influence of the boiling disturbance to formation bubble on heater strip in water, be easy to do various degree of supercoolings
Experiment under operating mode；
(4) high-speed camera that the utility model is equipped with, can shoot bubble on boiling pool heater strip mop up, merge,
Break-off；Set ESEM can shoot bubble departure diameter size, frequency and jet effect on boiling pool heater strip,
The diameter of bubble and heat flow density and the relation of position on boiling heater strip are obtained, so as to be provided for research boiling heat transfer problem
Theoretical research foundation, reasonable in design, principle is simple, be easy to promote the use of.
Brief description of the drawings
Fig. 1 is the structural representation of experimental provision of the present utility model；
Fig. 2 is the structural representation of heating module in the utility model；
Fig. 3 is the structural representation of heater strip fixed mechanism in the utility model；
Fig. 4 is the structural representation of the groove of falling V in the utility model；
Fig. 5 mops up phenomenon schematic diagram for five kinds on the heater strip that seethed with excitement in the utility model；
Fig. 6 is jet effect schematic diagram on the heater strip that seethed with excitement in the utility model；
Fig. 7 is the boiling heater strip of scanning electron microscope observation and the scale diagrams of bubble in the utility model.
Label declaration in schematic diagram：1st, table base；2nd, heating bath；3rd, experimental bench pillar；4th, heating power supply；5th, it is real
Test platform apical ring；6th, lift strut fixed mount；7th, lift strut；8th, heater strip fixed mount；9th, boiling pool；10th, high-speed camera；
11st, ESEM；12nd, arm support is imitated；13rd, heat supply heater strip；14th, light compensating lamp；15th, angulation piece；16th, chute；17th, spiral shell is adjusted
Nail；18th, half bare conductor；19th, seethe with excitement heater strip；20th, the groove of falling V.
Embodiment
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
With reference to Fig. 1, a kind of humorous container boiling heat transfer experimental provision of adjustable angle of the present embodiment, mainly by support plus
Heated filament secured adjusted mechanism, heating water bath mechanism, high-speed camera 10 and ESEM 11 etc. form, heater strip secured adjusted machine
Structure includes heater strip governor motion and heater strip fixed mechanism, and heater strip governor motion is connected with support, for horizontal or vertical
Adjust heater strip secured adjusted mechanism.Heating water bath mechanism is located at below heater strip secured adjusted mechanism, heater strip fixed mechanism
On boiling heater strip 17 Heating Experiment is carried out in heating water bath mechanism.
Support in the present embodiment is mainly made up of table base 1 and experimental bench pillar 3, and 3 experimental bench pillars 3 are along reality
The distribution of 1 circumferential uniform intervals of platform base is tested, the lower end of experimental bench pillar 3 is provided with imitative arm support 12, and ESEM 11 is fixed on imitative
On arm support 12, experimental data is gathered by high-speed camera 10 and ESEM 11.
Further, arm support 12 is imitated to increase steady head, and ESEM 11 has multiple directions fortune on imitative arm support 12
The dynamic free degree, can adjust or be observed angular adjustment with Level tune or vertically, easy to use, can obtain preferable experiment
Position, it is easy to observe.
Heating water bath mechanism in the present embodiment includes heating bath 2, boiling pool 9 and heating module, and heating module is used 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
Heated in fluid heat transfer working medium, heating bath 2 is heated by fluid heat transfer working medium to distilled water in boiling pool 9, and heater strip, which is fixed, to be adjusted
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 supporting plate and heat supply heater strip 13, heating power supply 4 is set
Put on the upside of power supply supporting plate, heat supply heater strip 13 is arranged on the downside of power supply supporting plate, and heating power supply 4 is that heat supply heater strip 13 carries
Power supply energy heat production, heat supply heater strip 13 could be arranged to the circular resistance wire of multi-turn, to improve heat production efficiency.Power supply supporting plate is put
Put 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 heating of heat supply heater strip 13,
Heat-exchange working medium heats.Heating bath 2 can be arranged to cuboid structure, then heating module can be placed in the side of heating bath 2, it is another
Side is used to place boiling pool 9.
What deserves to be explained is as shown in Fig. 2 heat supply heater strip 13 is connected by the mounting bracket of both sides with heating power supply 4, or
Person is directly connected with supporting plate, and two circle heat supply heater strip 13 up and down is provided with same mounting bracket.Further, for convenience
The fluid heat transfer working medium of different liquid levels is heated, there is provided the different efficiencies of heating surface, be divided to the left and right sides to set two groups of heat supplies to add
Heated filament 13, the two groups of location of heat supply heater strip 13 height are different.When liquid level is relatively low, lower height can be directly used
Heat supply heater strip 13 heated；When liquid level is higher, two groups are opened simultaneously, then can be heated in different height, heating
Efficiency high, and uniformity of temperature profile, contribute to the uniformity of Temperature Distribution in boiling pool 9.
In order to be observed by high-speed camera 10 and ESEM 11, heating bath 2 and boiling pool 9 are transparent
Material material, elect as in the present embodiment and use transparent PC material.The PC strengths of materials are preferable, are resistant to 150 DEG C of temperature, and transparency is very high,
Needs of observing and take 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, for boiling pool half in water, half in atmosphere, utilizes the water ebuillition of heated pond 9 of the bottom of heating bath 2, the water of boiling pool 9
Temperature slowly rises and uniformity of temperature profile, eliminates due to influence of the boiling disturbance to formation bubble on heater strip in water, is easy to
Do the experiment under various degree of supercooling operating modes.
With reference to Fig. 3, the heater strip fixed mechanism in heater strip secured adjusted mechanism is mainly by mainly by angulation piece 15, chute
16 are formed with boiling heater strip 19, and angulation piece 15 is semi-circular shape, and its middle part is connected with heater strip fixed mount 8, that is, passes through heating
Silk fixed mount 8 is fixed angulation piece 15, and its circular open is down.Chute 16, chute 16 are symmetrically offered on angulation piece 15
Adjusting screw 17 is inside equipped with, the both ends of boiling heater strip 19 are fixed in chute 16 by adjusting screw 17 respectively, when
When moving position of one of adjusting screw 17 in chute 16, the angle of inclination of boiling heater strip 19 changes, that is, passes through tune
Save the angle of inclination of the adjustable boiling heater strip 19 of screw 17.
During adjusting boiling pool heater strip, due to needing to form loop, and as far as possible not by external interference, angulation piece 16
From common PC materials, two and half bare conductors 18 are symmetrical arranged on angulation piece 16, half bare conductor, 18 distribution in the arc-shaped, half
The lower end of bare conductor 18 is in contact with boiling heater strip 19, and its upper end is connected with wire, forms loop.And radius size is less than chute
16 radius size, after boiling heater strip 19 is fixed with adjusting screw 17, boiling heater strip 19 is crushed on angulation piece 16
On, its surface is bonded with half nuditing wire 18, ensures to connect into the accuracy of loop and angle, that tries one's best reduces error.
Embodiment 2
With reference to Fig. 4, a kind of humorous container boiling heat transfer experimental provision of adjustable angle of the present embodiment, its basic structure and reality
It is identical to apply example 1, its difference is：The bottom of heater strip fixed mount 8 is stretched out in the concave arc of angulation piece 15, and its bottom is set
Two decks 20 being connected with wire are equipped with, two boiling heater strips 19, the boiling heater strip are drawn in the bottom of heater strip fixed mount 8
19 one end are connected with deck 20, and the other end is connected with adjusting screw 17, form two loops.19 liang of heater strip of adjustment boiling respectively
The position of the adjusting screw 17 at end, two angles of inclination can be formed, the observation experiment of differing tilt angles can be carried out simultaneously.
Further, graduation mark is carved with angulation piece 15, edge of the graduation mark along chute 16 is set, and is easy to adjusting spiral shell
Follow closely the adjustment of 17 positions.When seethe with excitement 19 horizontal level of heater strip when, can set angle be 0 °, graduation mark can indicate
70°。
Said structure sets and is easier to adjust, and sets left and right contrast, reduces operational ton as far as possible, facilitates considerable pair
Than experiment, no matter Level tune or any angle, which are adjusted, can meet, easy to use.DC circuit electric wire in the present embodiment
Pass through inside heater strip fixed mount with electric current, voltage measurement circuit, and connect by half nuditing wire and boiling pool heater strip
Connect.And specific experimental record equipment can directly use prior art, the present embodiment can not be described specifically.
Embodiment 3
A kind of humorous container boiling heat transfer experimental provision of adjustable angle of the present embodiment, its basic structure and the phase of embodiment 2
Together, its difference is：Heater strip governor motion is mainly by experimental bench apical ring 7, the and of lift strut fixed mount 8 in the present embodiment
Lift strut 9 forms.Wherein, experimental bench apical ring 7 is fixed on the top of experimental bench pillar 3, and level is fixed, in experimental bench apical ring 7
Wall offers annular groove, and experimental bench apical ring 7 of the lift strut fixed mount 8 along pedestal upper end is radially arranged, lift strut fixed mount
8 both ends are located in annular groove, then lift strut fixed mount 8 can be fixed around the central axis of experimental bench apical ring 9, lift strut
Frame 8 can also be radially arranged in the top of experimental bench apical ring 9, and main purpose, which is to realize, to be rotated, and concrete structure is not particularly limited.
In addition, offering T-slot in the lower wall of lift strut fixed mount 8, the upper end of lift strut 9 is correspondingly arranged on T-shaped connection
Block, then slide manually the OQ t pole fixed mount 8 of lift strut 9.It is possible to further under lift strut fixed mount 8
Rack is set outside wall, fixed motor is coordinated on lift strut 9, then can be slided by motor control lift strut 9.Lift strut
9 can carry out telescopic variation, and its type of drive can manually or electrically, be not specifically limited.Heater strip fixed mechanism is connected
The lower end of lift strut 9 is connected on, then both heater strip fixed mechanism can enough be adjusted with Level tune heater strip fixed mechanism position, and can
Highly, and then control to the position of boiling pool heater strip 19 is realized.
The combination between experimental bench apical ring, lift strut fixed mount and lift strut in heater strip governor motion can be real
Existing, rotation, translation and elevating movement, then can both adjust boiling heater strip position with different angle, and and can enough adjust boiling and heat
Silk height, convenient experiment adjustment, obtains preferable experimental site, is easy to observe.
Embodiment 4
A kind of humorous container boiling heat transfer experimental provision of adjustable angle of the present embodiment, wherein lift strut fixed mount 6 exist
Rotation, the slip of the OQ t pole fixed mount 6 of lift strut 7 and the elevating movement of lift strut 7 in experimental bench apical ring 5
By corresponding motor driving mechanisms control, and by the action of control system three motors of control, controlled and replaced using mechanization
Control manually, accuracy is higher, and the danger such as can avoid being burned in operating process.Used drive mechanism can use normal
The type of drive of rule, it is not necessary to repeat.
It can be mutually combined between various embodiments above different characteristic, be not limited to cited scheme.For above-mentioned implementation
The visualization bulk container experimental provision that example provides, present invention also offers a kind of experiment side for visualizing bulk container experimental provision
Method, it is concretely comprised the following steps：
1) preparation before testing：
Appropriate distilled water is added in boiling pool before experiment every time, heat-exchange working medium is added in heating bath, boiling is added
Heated filament 19 is fixed on angulation piece 15 with adjusting screw 17, and boiling heater strip 19 is in contact with half bare conductor 18, adjusts boiling pool
The angle of heater strip 20；
Described heat-exchange working medium is fluid heat transfer working medium, such as the nano-fluid of water, metal or non-metallic particle, propane, different
Butane etc., the boiling heat transfer situation of 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) experimental provision is started：
According to the heating gear of liquid level selection heating power supply 4 in heating bath 2, if liquid level is relatively low, it can only start single heat supply
Heater strip 13 is heated；If liquid level is higher, two groups of heat supply heater strips 13 can be started simultaneously while heated；Temperature in heating bath 2
Lasting to rise, temperature also can be raised slowly in boiling pool 9, until temperature reaches required temperature in boiling pool 9, then start constant temperature
Ebuillition of heated pond so that the working medium of boiling pool has the certain degree of superheat or degree of supercooling, can be tested.
In heating process, using intermittent heat mode, when the temperature difference meets or exceeds 20 DEG C, stopping heating being powered off,
Equitemperature difference is further continued for being heated when being close within 5 DEG C of scopes.So on the one hand it can reduce fluid heat transfer working medium reclaimed water
Evaporation, on the other hand can reduce the loss of electric energy.
In addition, can also add a lid in boiling pool 9 in heating, the evaporation rate of distilled water and the damage of heat are reduced
Lose；After the temperature of distilled water in boiling pool 9 is setting value, continuous heating for a period of time, exclude water in itself institute with non-condensing gas
Body, then connecting direct current on boiling pool heater strip 17 can be tested.
3) information：
The position and angle of ESEM 11 and high-speed camera 10, record experimental phenomena on the imitative arm support 12 of regulation；
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, carry out the debugging of light-inletting quantity and focal length afterwards.It should be noted that high-speed camera 10 can not heat apart from boiling pool
Silk 17 is too near, prevents vapor from influenceing experiment effect, or even damage high-speed camera 10.ESEM 11 is by imitating arm support 12
Good position and angle are set, observation information is gathered in experiment.
ESEM 11 is used to shoot bubble departure diameter size, frequency and jet effect on boiling pool heater strip 17, high
Fast video camera 10 is mopped up, merged for shooting bubble on boiling pool heater strip 17, break-off.
4) operating mode I is adjusted：
Suitable angle is selected, when the temperature of distilled water in boiling pool 9 reaches setting value, closes heating power supply 4, adjustment
The current switch to seethe with excitement on the dc source of heater strip 19, change size of current, obtain same position, it is different during same degree of supercooling
Bubble phenomenon in the case of heat flow density, preserve file, record data；
Its process is first to adjust direct current power source voltage electric current, and it is all zero to make it, then opens DC power supply switch, first progressively
Increase voltage to sufficiently large, electric current remains zero, then gradually adjustment electric current to correct position, is carried out more accurate using vernier knob
Regulation.Data Collection can be carried out using high speed camera 10 or ESEM 11 when needing, and record each item data.
5) operating mode II is adjusted：
Suitable angle is selected, adjusts the current switch on the dc source of boiling heater strip 19, makes its electric current, voltage dimension
A definite value is held, then adjusts heating power supply 4, obtains same position, it is each in the case of difference degree of supercooling during same heat flow density
Kind bubble phenomenon, preserves file, record data；
6) operating mode III is adjusted：
When the temperature of distilled water in boiling pool 9 reaches setting value, heating power supply 4 is closed, adjustment boiling heater strip 19
Current switch on dc source, its electric current, voltage is maintained a definite value, the angle of regulation boiling heater strip 19, carry out real
Test, obtain the various bubble phenomenons of different angle during same heat flow density in the case of same degree of supercooling, preserve file, record number
According to；
When all experiments are all finished, first have to close heating power supply 4 and DC power supply switch, then add boiling
Heated filament 19 rises, and arranges experimental bench (now water temperature is higher, with burn prevention), need to will be seethed with excitement with lid when not having to distilled water temporarily
Pond is closed, in case air impact distills water quality.If necessary to which when repeatedly testing, distilled water need to be changed, because in experimentation
The purity of distilled water can be influenceed, so as 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
Test, study the boiling heat transfer situation under different boiling pool heater strips and heat-exchange working medium.
First dc source must be powered off when changing boiling heater strip 19, with anti-tamper boiling heater strip 19, reuse and add
Heated filament lift strut 7 rises boiling heater strip 19, changes other heater strips into.
When operating mode I and operating mode II are tested, it is horizontal level that can adjust boiling heater strip, may also set up wherein one
Bar boiling heater strip is in water position, and another is in angle of inclination, the experimental phenomena that can be observed simultaneously under two states, just
In comparison；Two heater strips can be set to be in different angles of inclination in operating mode III, entered for differing tilt angles situation
Row compares.In addition, different operating modes are the experiments individually carried out in this programme, sequencing is listed in step and simply facilitates scheme
Description, can individually it carry out during concrete operations.
7) Data Processing in Experiment：
After experimental data collection terminates, observe bubble on boiling pool heater strip four kinds mop up phenomenon and bubble roof jet
Phenomenon, bubble diameter is estimated according to ESEM resolution grid and boiling pool heater strip diameter.As shown in figure 5, boiling pool adds
Mop up phenomenon on heated filament and include for five kinds：Moving Bubble is back and forth mopped up between two static bubbles, two bubble move toward one anothers, two
Bubble moves in the same direction and a bubble motion and the phenomenon for bumping against latter motion with second static bubble, and bubble inclination
The situation of motion.
As shown in Figure 6, bubble roof jet effect includes：Penetrated to bottom one-jet, to top one-jet, to top more
Flow phenomenon；When being observed using ESEM, as shown in fig. 7, being heated according to ESEM resolution grid and boiling pool
Silk diameter estimation bubble diameter.
The experimental method of the present invention, it is provided with heater strip angle adjusting mechanism, the convenient position for adjusting boiling pool heater strip
Put, the high-speed camera being equipped with, can shoot bubble on boiling pool heater strip mop up, merge, break-off；And it can pass through
The position of adjusting screw regulation boiling heater strip, changes its angle of inclination, then boiling heater strip position can be both adjusted with different angle
Put, influence of the observed gravity to bubble formation, and can enough adjusts boiling heater strip height, so as to be carried for research boiling heat transfer problem
Theoretical research foundation is supplied.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, without designing and the technical scheme for creativeness
Similar frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (8)
1. a kind of humorous container boiling heat transfer experimental provision of adjustable angle, including support, heater strip secured adjusted mechanism, water-bath add
Heat engine structure, high-speed camera (10) and ESEM (11), it is characterised in that consolidating in described heater strip secured adjusted mechanism
To determine mechanism to be mainly made up of angulation piece (15), chute (16) and boiling heater strip (19), angulation piece (15) is semi-circular shape, wherein
Portion is connected with heater strip fixed mount (8), and chute (16) is symmetrically offered on angulation piece (15), the boiling heater strip (19)
End is fixed in chute (16) by adjusting screw (17), and the inclination of boiling heater strip (19) is adjusted by adjusting screw (17)
Angle.
A kind of 2. humorous container boiling heat transfer experimental provision of adjustable angle according to claim 1, it is characterised in that：It is described
Heater strip fixed mount (8) bottom stretch out in the concave arc of angulation piece (15), its bottom with seethe with excitement heater strip (19) be connected, make
Boiling heater strip (19) is divided into two parts.
A kind of 3. humorous container boiling heat transfer experimental provision of adjustable angle according to claim 2, it is characterised in that：It is described
Heater strip fixed mount (8) bottom is provided with two decks (20) being connected with wire, and heater strip fixed mount (8) bottom draws two
Seethe with excitement heater strip (19), and boiling heater strip (19) one end is connected with deck (20), and the other end is connected with adjusting screw (17), shape
Into two loops.
4. a kind of humorous container boiling heat transfer experimental provision of adjustable angle according to claim 1 or 2 or 3, its feature exist
In：Two and half bare conductors (18) are symmetrically arranged with the angulation piece (15), half bare conductor (18) is circular arc, and radius ruler
The very little radius size less than chute (16).
5. a kind of humorous container boiling heat transfer experimental provision of adjustable angle according to claim 1 or 2 or 3, its feature exist
In：Graduation mark is carved with the angulation piece (15), edge of the graduation mark along chute (16) is set.
A kind of 6. humorous container boiling heat transfer experimental provision of adjustable angle according to claim 1, it is characterised in that：Device
In support, heater strip secured adjusted mechanism, heating water bath mechanism be connected, the heater strip secured adjusted mechanism is arranged on branch
On frame, heating water bath mechanism is located at below heater strip secured adjusted mechanism, and imitative arm support (12), scanning electricity are provided with support
Mirror (11) is fixed on imitative arm support (12), and experimental data is gathered by high-speed camera (10) and ESEM (11).
A kind of 7. humorous container boiling heat transfer experimental provision of adjustable angle according to claim 6, it is characterised in that：Heating
Governor motion in silk secured adjusted mechanism is mainly by experimental bench apical ring (5), lift strut fixed mount (6) and lift strut (7)
Composition, experimental bench apical ring (5) of the lift strut fixed mount (6) along pedestal upper end are radially arranged and can be around experimental bench apical ring (5)
Central axis, the lift strut (7) is movably arranged on lift strut fixed mount (6) bottom, and can pass through lift strut
(7) heater strip fixed mechanism is controlled to move up and down.
A kind of 8. humorous container boiling heat transfer experimental provision of adjustable angle according to claim 6, it is characterised in that：It is described
Heating water bath mechanism include heating bath (2), boiling pool (9) and heating module, heating module is used for the liquid in heating bath (2)
Body heat-exchange working medium is heated, and heating bath (2) is heated by liquid heat exchange working medium to being placed on its internal boiling pool (9), heater strip
Tested in the distilled water that boiling heater strip (19) in secured adjusted mechanism is placed in boiling pool (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720849363.1U CN207182748U (en) | 2017-07-13 | 2017-07-13 | A kind of humorous container boiling heat transfer experimental provision of adjustable angle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720849363.1U CN207182748U (en) | 2017-07-13 | 2017-07-13 | A kind of humorous container boiling heat transfer experimental provision of adjustable angle |
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| CN207182748U true CN207182748U (en) | 2018-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154205A (en) * | 2017-07-13 | 2017-09-12 | 安徽工业大学 | A kind of humorous container boiling heat transfer experimental provision of adjustable angle and experimental method |
| CN113218990A (en) * | 2021-04-20 | 2021-08-06 | 江苏科技大学 | Visual pool boiling experiment system and working method thereof |
-
2017
- 2017-07-13 CN CN201720849363.1U patent/CN207182748U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154205A (en) * | 2017-07-13 | 2017-09-12 | 安徽工业大学 | A kind of humorous container boiling heat transfer experimental provision of adjustable angle and experimental method |
| 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 |
| CN113218990A (en) * | 2021-04-20 | 2021-08-06 | 江苏科技大学 | Visual pool boiling experiment system and working method thereof |
| 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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Granted publication date: 20180403 Termination date: 20190713 |