CN103969023B - A kind of generator of moving boundary - Google Patents
A kind of generator of moving boundary Download PDFInfo
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- CN103969023B CN103969023B CN201410120331.9A CN201410120331A CN103969023B CN 103969023 B CN103969023 B CN 103969023B CN 201410120331 A CN201410120331 A CN 201410120331A CN 103969023 B CN103969023 B CN 103969023B
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- control module
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- deformation
- outer boundary
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Abstract
The present invention relates to the generator of a kind of moving boundary, including source of the gas, the frequency control module of border deformation, the time control module of border deformation and the control module of border deformation size, negative pressure maker and the installation equipment of studied difformity object.This device can produce and difform movably stream border, by source of the gas and various control module, boundary region is changed, if not doing any parameter change in experimentation, variously-shaped static state can be realized and stream, if using frequency control module, time control module and the control module of deformation size, the Deformation control to border can be realized, and difform streaming can be realized by different installation equipment, thus produce moving boundary and stream.
Description
Technical field
The present invention relates to the generator of a kind of moving boundary, fluid can be made through the object (motion of different shape
Border) after, the phenomenon of flowing can be studied after it streams, by this device (outward) produce behind border different
Venturi effect, thus constitute different Flow Fields.
Background technology
It is classical fluid mechanics problem that the cylinder of various different shapes and combinations thereof, rectangular column etc. stream motion.
In real life, there is various by-pass means such as bridge pier, aircraft wing, marine organisms etc., very
The model streaming motion all it is be unable to do without as large-sized objects such as the support column of offshore oil acquisition platform and aircraft carriers
Farmland.In these stream object, the most more have researching value is streaming, as fish of changing of those borders
Aquatic animals such as class and gather around winged flight animal and have passed through the evolution of hundreds of millions of years, by various cruelty
The evolution of the Nature selects, and creates travelling in the water shown unique characteristics and the specific ability of sky flight.Bionical grind
Study carefully and always be study hotspot both domestic and external, develop bionic Aircraft, mechanical bird and mechanical fish etc. bionical equipment
It is constantly subjected to the great attention of the military, there is Military Application background.
The flight of the travelling and birds of Fish only by body wave or wing brandish it is achieved that its
Principle is to utilize the flow field of the dynamic deformation and periphery that stream border to occur to interact thus obtains urging it
The power run.Along with the further development of current aviation, navigation and military cause, domestic and international hydrodynamics
The interaction that the flow field of dynamic deformation and periphery that border is just being streamed on boundary at extensive concern occurs.Can be the most domestic
Research to Fish, birds mobility outward is still within Phenomena Observation and qualitative description stage, lacks quantitative reality
Test amount, numerical computations and mechanical mechanism analysis.
Summary of the invention
It is an object of the invention to provide the experimental provision that streams of a kind of Moving Boundary, solve prior art and cannot make border
Change and the control of border deformation cannot be realized.
In order to achieve the above object, the technical scheme is that the generator providing a kind of moving boundary, use
Stream experiment in difformity object is carried out Moving Boundary, set including the installation being provided with difformity object
It is standby, it is characterised in that: outside installation equipment, it is cased with outer boundary layer, the two ends of outer boundary layer and installation equipment two ends
The airtight laminating of outer wall, also includes:
Source of the gas, one side makes negative pressure maker obtain power；On the other hand outwards export gas, this gas sequentially into
Less through by the equipment of installation input outer boundary layer after voltage regulating module and frequency/time control module so that outside
Interlayer is deformed；
Negative pressure maker, produces negative-pressure gas, thus via frequency/time control module and the extraction of the equipment of installation
Gas in outer boundary layer；
Voltage regulating module, is used for adjusting effluent air pressure, to control the amplitude of deformation of outer boundary layer；
Frequency/time control module, the barotropic gas produced by voltage regulating module according to setpoint frequency and negative pressure generate
Negative-pressure gas and the installation equipment that device produces toggles conducting, and according to the time of setting control conducting every time time
Between, thus control the time speed in the deformation frequencies of outer boundary layer and deformation process.
Preferably, also include amplitude control module, for accurately controlling effluent air flow, with described pressure regulation
Module acts on jointly so that the control of described outer boundary layer amplitude of deformation is more accurate.
Preferably, described amplitude control module uses high-precision air relief valve.
Preferably, described high-precision air relief valve is valuator.
Preferably, described negative pressure maker is mainly made up of La Foer pipe.
Preferably, described voltage regulating module includes connecting the pressure regulator valve having pressure nominal device.
Preferably, described frequency/time control module includes two electromagnetic valves, and all electromagnetic valves are respectively connected with frequency
Rate generator, the outfan of two electromagnetic valves is connected to described installation equipment, and the input of two electromagnetic valves divides
It is not connected with described voltage regulating module and described negative pressure maker, frequency generator controls two electromagnetic valves according to setting
Determine frequency on or off, thus control the contraction state of outer boundary layer, it is possible to according to the frequency size set
Control the deformation time length of outer boundary layer.
The present invention can produce difform movably streams border, makes border by source of the gas and various control module
Layer changes, if not doing any parameter change in experimentation, can realize variously-shaped static state and streaming,
If using frequency control module, time control module and the control module of deformation size, the change to border can be realized
Shape controls, and can realize difform streaming by different installation equipment, thus produce moving boundary around
Stream.This experimental facilities is the most simple, has good repeatability, grinds moving boundary circumferential motion problem
Study carefully and not only there is good stickiness, but also can do at corresponding device according to different requirement of specific experiment
Reason, thus reach the effect drawn inferences about other cases from one instance.
Accompanying drawing explanation
The system block diagram of the generator of a kind of moving boundary that Fig. 1 provides for the present invention；
Fig. 2 is the installation equipment schematic diagram in the present invention；
Fig. 3 A is that the A-A of Fig. 2 is to sectional view；
Fig. 3 B is that the B-B of Fig. 2 is to sectional view.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
As it is shown in figure 1, the generator of the moving boundary of present invention proposition includes that source of the gas, voltage regulating module, border become
The amplitude control module of shape, the frequency/time control module of border deformation, negative pressure maker and be provided with by
The installation equipment 3 of the difformity object of research.
Source of the gas may utilize air compressor, and its role in moving boundary experimental provision is: ensures moving boundary
Formed, and provide aerodynamic force to the parts such as voltage regulating module, amplitude control module and negative pressure maker, it is ensured that be whole
The gas source of individual device, is the guarantee that constantly runs of the generator of moving boundary.
Voltage regulating module is mainly made up of with pressure nominal device 2 pressure regulator valve, and wherein pressure regulator valve can be described as subtracting substantially
Pressure valve, its operation principle is as follows: high-pressure medium is charged to a relatively large chamber interior-excess by an aperture and now subtracts
Pressure, actually by decompression of damming.Its role in moving boundary experimental provision is: regulate and control whole moving boundary
Generator in gas pressure, the deformation controlling flow and outer boundary layer together with amplitude control module is big
Little, safeguards system is run under normal pressure.
Amplitude control module can use the pneumatic control equipments such as valuator, thus accurately changes the deformation of moving boundary
Size.Valuator is a kind of high-precision air relief valve, is mainly used in pressure definite value and adjusts, and it is former by dynamic balance
Reason is operated.Amplitude control module plays the effect of accurate flow control after voltage regulating module, thus smart
Really control the deformation size of outer boundary layer 1.
Frequency/time control module is controlled with giving vent to anger for convection cell air inlet, mainly by frequency generator and
Two electromagnetic valve compositions.The outfan of two electromagnetic valves is connected to installation equipment 3, the input of two electromagnetic valves
End is connected with voltage regulating module and negative pressure maker respectively.Utilize frequency generator can control electromagnetic valve easily
Open and close frequency, thus realize the deformation frequencies of outer boundary layer 1 is controlled.Electromagnetic valve is used for adjusting fluid
Direction, flow, speed and other parameter, proportion of utilization valve etc. interacts, can carry out moving boundary deformation
During time speed control.Reach outer boundary layer 1 deformation time length by choosing suitable electromagnetic valve
The purpose being controlled with speed.
Negative pressure maker is mainly made up of La Foer pipe.Fluid, at local contraction, makes flow velocity increase, and produces
Negative pressure.This feature is utilized to be configured as negative pressure maker.The effect in a device of negative pressure maker is for outside
The contraction of interlayer 1 provides safeguard.
In the installation equipment 3 being provided with studied difformity object, difformity object include cylinder,
Rectangular column, streamlined post and airfoil post etc..Boundary means under different operating modes, can make moving boundary
Apply to various aspects streams situation.As shown in Fig. 2, Fig. 3 A and Fig. 3 B, in the present embodiment, peace
Installing standby 3 is the elongate cylindrical pipe of metal material, with blow vent in the middle part of column tube, and can be by gas by pacifying
Outer boundary layer is led in installing standby 3, and outer boundary layer 1 is rubber sleeve, is enclosed within outside column tube, and by rubber sleeve
Two ends and the airtight laminating of column tube outer wall, thus ensure that outer boundary layer 1 reasonably deforms.Outside the two ends of column tube
Side blow vent is connected with frequency/time control module corresponding interface, and gas is entered by frequency/time control module
In column tube, size and speed of incoming flow according to gas flow control the outer boundary layer between two column tubes at regular time and quantity
Ground expansion and contraction.
Being more than the effect around flow boundary device various piece, various piece is coordinated together by this device, its
Work process is:
The first step, adjustment voltage regulating module, amplitude control module, frequency/time control module are to initial position；
Second step, the cylindrical device of installation experiment desirable type also install outer boundary layer 1 additional；
3rd step, open source of the gas, make gas pass sequentially through voltage regulating module, amplitude control module, frequency/time
Control module, finally arrives outer boundary layer 1, it is ensured that air-flow is unimpeded；On the other hand negative pressure maker is made to obtain dynamic
Power；
4th step, experimental condition, regulation voltage regulating module controls single unit system air pressure；
5th step, amplitude of accommodation control module make outer boundary layer deformation size reach experiment condition requirement；
6th step, regulating frequency/time control module controls the direction of gas, flow and speed etc. and makes outside
Interlayer is expanded to the time of maximum and meets experiment condition requirement, and carries out as required shrinking or continues to expand；
If the control of frequency/time control module is not made outer boundary layer produce a desired effect by the 7th step,
Then debug each experimental provision, repeat the process of the 4th step to the 6th step；
If the 8th step has reached requirement of experiment to the control of frequency/time control module, then according to next operating mode,
Repeat second step to the process of the 6th step.
Claims (6)
1. the generator of a moving boundary, experiment is streamed for difformity object is carried out Moving Boundary, including the installation equipment (3) being provided with difformity object, it is characterized in that: outside the equipment of installation (3), be cased with outer boundary layer (1), the two ends of outer boundary layer (1) and installation equipment (3) the two ends airtight laminating of outer wall, also include:
Source of the gas, one side makes negative pressure maker obtain power；On the other hand outwards exporting gas, this gas is inputted outer boundary layer (1) at least through warp after voltage regulating module and frequency/time control module by the equipment of installation (3) successively so that outer boundary layer (1) is deformed；
Negative pressure maker, produces negative-pressure gas, thus via the gas in frequency/time control module and the equipment of installation (3) extraction outer boundary layer (1)；
Voltage regulating module, is used for adjusting effluent air pressure, to control the amplitude of deformation of outer boundary layer (1)；
Frequency/time control module, the negative-pressure gas that the barotropic gas produced by voltage regulating module according to setpoint frequency and negative pressure maker produce toggles conducting with the equipment of installation (3), and control the time every time turned on according to the time of setting, thus control deformation frequencies and the deformation time length of outer boundary layer (1)；
Described frequency/time control module includes two electromagnetic valves, all electromagnetic valves are respectively connected with frequency generator, the outfan of two electromagnetic valves is connected to described installation equipment (3), the input of two electromagnetic valves is connected with described voltage regulating module and described negative pressure maker respectively, two electromagnetic valves are controlled according to setpoint frequency on or off by frequency generator, thus control the contraction state of outer boundary layer (1), it is possible to the deformation time length of outer boundary layer is controlled according to the frequency size set.
The generator amplitude control module of a kind of moving boundary the most as claimed in claim 1, it is characterized in that: also include amplitude control module, for accurately controlling effluent air flow, jointly act on described voltage regulating module so that the control of described outer boundary layer (1) amplitude of deformation is more accurate.
The generator amplitude control module of a kind of moving boundary the most as claimed in claim 2, it is characterised in that: described amplitude control module uses high-precision air relief valve.
The generator amplitude control module of a kind of moving boundary the most as claimed in claim 3, it is characterised in that: described high-precision air relief valve is valuator.
The generator amplitude control module of a kind of moving boundary the most as claimed in claim 1, it is characterised in that: described negative pressure maker is mainly made up of La Foer pipe.
The generator amplitude control module of a kind of moving boundary the most as claimed in claim 1, it is characterised in that: described voltage regulating module includes that connection has the pressure regulator valve of pressure nominal device (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410120331.9A CN103969023B (en) | 2014-03-27 | 2014-03-27 | A kind of generator of moving boundary |
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| CN201410120331.9A CN103969023B (en) | 2014-03-27 | 2014-03-27 | A kind of generator of moving boundary |
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| CN103969023A CN103969023A (en) | 2014-08-06 |
| CN103969023B true CN103969023B (en) | 2016-12-07 |
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| CN105509996B (en) * | 2015-12-29 | 2017-12-26 | 西南石油大学 | A kind of marine riser streams the measure device and method of resistance coefficient and lift coefficient |
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| JPH08136396A (en) * | 1994-11-04 | 1996-05-31 | Yaskawa Electric Corp | Device and method for measuring air flow |
| DE102008002448A1 (en) * | 2008-06-16 | 2009-12-24 | Airbus Deutschland Gmbh | Method and system for determining a force acting on a body |
| CN202501975U (en) * | 2012-03-27 | 2012-10-24 | 中国矿业大学 | Flow field display experimental apparatus |
| CN102628731B (en) * | 2012-04-13 | 2014-07-02 | 欧进萍 | Steady air suction/blowing control device of structural wall surface ambient flow field |
| CN103149011B (en) * | 2013-03-06 | 2015-04-15 | 中国船舶重工集团公司第七○二研究所 | Test device and method for forming high-speed stable flow field |
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