CN109540963A - A kind of enhanced heat exchange experimental system based on tube wall excitation - Google Patents
A kind of enhanced heat exchange experimental system based on tube wall excitation Download PDFInfo
- Publication number
- CN109540963A CN109540963A CN201811576391.6A CN201811576391A CN109540963A CN 109540963 A CN109540963 A CN 109540963A CN 201811576391 A CN201811576391 A CN 201811576391A CN 109540963 A CN109540963 A CN 109540963A
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- test part
- fluid
- exciter test
- water tank
- heat exchange
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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
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a kind of enhanced heat exchange experimental systems based on tube wall excitation.Agitating device is mounted in water tank, drainpipe is set to water tank bottom, fluid successively reaches exciter test part by electronic pump group, first flow regulating valve, flowmeter, first pressure sensor, the first temperature sensor after water tank outflow, exciter test part is fixed on actuating vibration table, exciting rod is rigidly fixed on actuating vibration table, upper end withstands on exciter test part, high-speed photography system is located above exciter test part, after fluid flows out exciter test part, water tank is returned to through second temperature sensor, second pressure sensor, second flow regulating valve.The present invention can heat fluid, motivate, and observe internal flow state, the vibrational excitation of different amplitudes, different frequency, the different vibration shapes can be applied to fluid, the flow pattern of the secondary flow structures such as the longitudinal Vortex that near wall generates after research excitation, and its fluid interchange rule, verify the corresponding relationship between vibrational excitation and convection heat transfer intensity.
Description
Technical field
The present invention relates to enhanced heat exchange fields, more particularly, to a kind of enhanced heat exchange experimental system based on tube wall excitation.
Background technique
In existing power battery, electronic chip liquid cooling technology, in order to obtain bigger face body ratio, small ruler is generallyd use
Liquid cooling channel is spent, but this is also resulted in when flowing most in laminar condition, cannot sufficiently be developed, be obtained its exchange capability of heat
Limitation is arrived.The mode of increase flow is generallyd use to obtain higher heat exchange efficiency, but the increasing degree of flow resistance is far high
In the promotion of heat exchange property, it is made to lose practical significance.
Summary of the invention
For overcome the deficiencies in the prior art, in order to obtaining as big as possible change under external input as small as possible
Hot property, the present invention provides a kind of enhanced heat exchange experimental systems based on tube wall excitation, can study and apply high frequency to wall surface
Near wall generates after low amplitude vibration excitation the secondary flow structure such as longitudinal Vortex and its for being flowed between tube wall and mainstream fluid
The affecting laws of heat exchange may be implemented to improve convection transfer rate with the lesser pressure loss, reach the mesh for strengthening heat convection
's.
A kind of enhanced heat exchange experimental system based on tube wall excitation, agitating device are mounted in water tank, and drainpipe is set to water
Bottom portion, fluid from water tank outflow after successively by electronic pump group, first flow regulating valve, flowmeter, first pressure sensor,
First temperature sensor reaches exciter test part, and exciter test part is fixed on actuating vibration table work top, and exciting rod rigidly fixes
On actuating vibration table, upper end withstands on exciter test part, and high-speed photography system is located above exciter test part, is rigidly fixed by bracket
On the ground, after fluid outflow exciter test part, through second temperature sensor, second pressure sensor, second flow regulating valve
Return to water tank.
The exciter test part is fixed on actuating vibration table work top by fixed bracket, and exciter test part is generally
The inner rectangular water channel being integrally machined out, two sides connection intake-outlet and pipe fitting, cavity back process heating rod hole location,
Heating rod is inserted in heating rod hole, cavity front is the organic observation glass being bonded on water channel, and cavity bottom is vibrating membrane, is led to
It crosses vibration membrane pressure plate to be fixed in the groove processed on main body water channel, vibrating membrane pressing plate is bolted on main body waterway wall
On face, exciting rod is withstood on vibrating membrane.
The vibrating membrane, material is engineering flexible material or metal thin-wall, with a thickness of 0.5mm, has rigidity,
Deformation can be generated by being vibrated after motivating.
The exciting rod is a kind of mechanical signal amplifier, and material is metal, and shape is a solid elongate rod, top
Portion is a flat surface, and is against at vibration center membrane, and bottom is a lateral fixed link, is fixed on actuating vibration table work top, exciting rod
The vibrational excitation that actuating vibration table generates is transmitted to vibration center membrane.
The exciter test part discharges fluorescent dye, the stream that display fluid generates when flowing as fluid flows therethrough
Line, for observing fluid flow patterns therein in experiment, to carry out visual research using high-speed photography system.
The beneficial effects of the present invention are: can be heated, be motivated to fluid, and observe the experiment system of internal flow state
System.The vibrational excitation of different amplitudes, different frequency, the different vibration shapes can be applied to fluid, near wall generates after research excitation
The flow pattern of the secondary flow structure such as longitudinal Vortex, and its for fluid interchange rule between tube wall and mainstream fluid, verify vibrational excitation
Corresponding relationship between convection heat transfer intensity.The present invention may be implemented to improve convection transfer rate with the lesser pressure loss,
Achieve the purpose that strengthen heat convection.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the enhanced heat exchange experimental provision based on tube wall excitation of the present invention；
Fig. 2 is the structural schematic diagram of exciter test part in a kind of enhanced heat exchange experimental provision based on tube wall excitation of the present invention；
Description of symbols: electronic pump group 1, first flow regulating valve 2, second flow regulating valve 12, flowmeter 3, first pressure
Sensor 4, the first temperature sensor 5, high-speed photography system 6, exciter test part 7, exciting rod 8, actuating vibration table 9, second temperature pass
Sensor 10, second pressure sensor 11, water tank 13, agitating device 14, drainpipe 15, vibrating membrane 16, vibrating membrane pressing plate 17, main body
Water channel 18, observation glass 19, heating rod 20, fixed bracket 21.
Specific embodiment
Below in conjunction with drawings and examples, the present invention will be further elaborated.
As shown in Figure 1, a kind of enhanced heat exchange experimental system based on tube wall excitation, agitating device 14 are mounted on water tank 13
In, drainpipe 15 is set to 13 bottom of water tank, and fluid successively passes through electronic pump group 1, first flow regulating valve after the outflow of water tank 13
2, flowmeter 3, first pressure sensor 4, the first temperature sensor 5 reach exciter test part 7, and exciter test part 7 is fixed on sharp
It shakes on 9 work top of platform, exciting rod 8 is rigidly fixed on actuating vibration table 9, and upper end withstands on exciter test part 7, high-speed photography system 6
It above exciter test part 7, is rigidly fixed on the ground by bracket, after fluid flows out exciter test part, through second temperature
Sensor 10, second pressure sensor 11, second flow regulating valve 12 return to water tank 13.
As shown in Figure 1 and Figure 2, the exciter test part 7 is fixed on 9 work top of actuating vibration table by fixed bracket 21
On, the inner rectangular water channel that exciter test part 7 is generally integrally machined out, two sides connect intake-outlet and pipe fitting, cavity back
Portion processes heating rod hole location, and heating rod 20 is inserted in heating rod hole, and cavity front is the organic observation being bonded on water channel
Glass 19, cavity bottom are vibrating membrane 16, are fixed in the groove processed on main body water channel 18 by vibrating membrane pressing plate 17, are shaken
Dynamic membrane pressure plate 17 is bolted on main body water channel wall surface, and exciting rod 8 is withstood on vibrating membrane 16.
The vibrating membrane 16, material is engineering flexible material or metal thin-wall, with a thickness of 0.5mm, is had rigidly,
Deformation, and fatigue life with higher can be generated after being vibrated excitation.
The exciting rod 8 is a kind of mechanical signal amplifier, and material is metal, and shape is a solid elongate rod,
Top is a flat surface, and is against at 16 center of vibrating membrane, and bottom is a lateral fixed link, is fixed on actuating vibration table work top, is swashed
The vibrational excitation that actuating vibration table 9 generates is transmitted to 16 center of vibrating membrane by vibration bar 8.
The exciter test part 7 discharges fluorescent dye (such as rhodamine B) as fluid flows therethrough, shows fluid stream
The streamline generated when dynamic, for observing fluid flow patterns therein in experiment, to use the progress of high-speed photography system 6 can
It is studied depending on changing.
Application Example
As shown in Figure 1 and Figure 2, fluid is driven by electronic pump group 1 in experimentation, is allowed to complete from water tank 13 and exciter test part 7
Between closed cycle, and the fluid in exciter test part 7 is kept by first flow regulating valve 2 and second flow regulating valve 12
Flow velocity is uniform.Actuating vibration table 9 is opened, frequency low-amplitude vibrational excitation is generated, by exciting rod 8 to the one-sided pipe wall of exciter test part 7
Exciting is carried out, concrete mode is that the movement of exciting film 16 is driven by exciting rod 8, amplifies the vibrating effect of shake table.It is motivated
The Secondary Flow that tube wall surface generates can be captured through observation glass 19 by high-speed photography system 6.Exciter test part 7 is by fixed bracket 21
It is fixed on electrokinetic tests platform work top.
To observe influence of the different tube wall excitations to fluid heat transfer, in fluid by being heated stick when exciter test part 7
20 heating.In the case where guaranteeing flow velocity and equal heating temperature, sensed by comparing the first temperature sensor 5 with second temperature
The temperature difference before and after the testpieces that device 10 measures can get the influence of different excitation heat exchangings.
For guarantee fluid enter test specimen at temperature it is constant, make whole system heat input output keep balance, design
Guarantee is heated fluid and is cooled down in water return pipeline, and places agitating device 14 in water tank 13, and stirring makes fluid in water tank
Cooling and uniform, which carries out feedback regulation by temperature sensor 5, if 7 inlet temperature of exciter test part increases,
Quickening is then stirred, otherwise stirring slows down.
As described above, only presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention, i.e.,
It is all according to equivalent variations made by the present invention and modification, be all that scope of the invention as claimed is covered, no longer illustrate one by one here.
Claims (5)
1. a kind of enhanced heat exchange experimental system based on tube wall excitation, which is characterized in that agitating device (14) is mounted on water tank
(13) in, drainpipe (15) is set to water tank (13) bottom, fluid flowed out from water tank (13) after successively by electronic pump group (1), the
One flow control valve (2), flowmeter (3), first pressure sensor (4), the first temperature sensor (5) reach exciter test part
(7), exciter test part (7) is fixed on actuating vibration table (9) work top, and exciting rod (8) is rigidly fixed on actuating vibration table (9), on
End is withstood on exciter test part (7), and high-speed photography system (6) is located above exciter test part (7), is rigidly fixed in ground by bracket
On face, after fluid flows out exciter test part, through second temperature sensor (10), second pressure sensor (11), second flow tune
Section valve (12) returns to water tank (13).
2. enhanced heat exchange experimental system as described in claim 1, which is characterized in that the exciter test part (7), by solid
Fixed rack (21) is fixed on actuating vibration table (9) work top, the inner rectangular water that exciter test part (7) is generally integrally machined out
Road, two sides connection intake-outlet and pipe fitting, cavity back process heating rod hole location, are inserted with heating rod in heating rod hole
(20), cavity front is the organic observation glass (19) being bonded on water channel, and cavity bottom is vibrating membrane (16), passes through vibrating membrane
Pressing plate (17) is fixed in the groove processed on main body water channel (18), and vibrating membrane pressing plate (17) is bolted on main body water
On road wall surface, exciting rod (8) is withstood on vibrating membrane (16).
3. enhanced heat exchange experimental system as claimed in claim 2, which is characterized in that the vibrating membrane (16), material are
Engineering flexible material or metal thin-wall have rigidity with a thickness of 0.5mm, can generate deformation after being vibrated excitation.
4. enhanced heat exchange experimental system as claimed in claim 2, which is characterized in that the exciting rod (8) is a kind of machinery
Formula signal amplifier, material are metal, and shape is a solid elongate rod, and top is a flat surface, and are against vibrating membrane (16) center
Place, bottom are a lateral fixed link, are fixed on actuating vibration table work top, the vibration that exciting rod (8) generates actuating vibration table (9) swashs
It encourages and is transmitted to vibrating membrane (16) center.
5. enhanced heat exchange experimental system as claimed in claim 2, which is characterized in that the exciter test part (7) works as fluid
When flowing through, fluorescent dye, the streamline that display fluid generates when flowing, for observing fluid flowing therein in experiment are discharged
Form, to carry out visual research using high-speed photography system (6).
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| CN201811576391.6A CN109540963B (en) | 2018-12-22 | 2018-12-22 | Reinforced heat exchange experimental system based on pipe wall excitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576391.6A CN109540963B (en) | 2018-12-22 | 2018-12-22 | Reinforced heat exchange experimental system based on pipe wall excitation |
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| CN109540963A true CN109540963A (en) | 2019-03-29 |
| CN109540963B CN109540963B (en) | 2023-08-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112373738A (en) * | 2020-11-23 | 2021-02-19 | 北京空间机电研究所 | Thin-wall structure vibration test device and test method considering pressure difference condition |
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| CN109540963B (en) | 2023-08-18 |
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