CN109870390A - A kind of analogy method and device of Dual-Phrase Distribution of Gas olid transport environment pressure - Google Patents
A kind of analogy method and device of Dual-Phrase Distribution of Gas olid transport environment pressure Download PDFInfo
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- CN109870390A CN109870390A CN201910101018.3A CN201910101018A CN109870390A CN 109870390 A CN109870390 A CN 109870390A CN 201910101018 A CN201910101018 A CN 201910101018A CN 109870390 A CN109870390 A CN 109870390A
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Abstract
The invention discloses the simulators and method of a kind of Dual-Phrase Distribution of Gas olid transport environment pressure, it from top to bottom include being sequentially connected to connect and internal gas vent cone section, cylindrical gas vent straight section and the cylindrical section main body being connected, it is cone shape that gas vent, which bores section, and front end offers gas vent；The diameter of gas vent straight section is less than the diameter of cylindrical section main body；Cylindrical section body rear is also connected with the internal powder collection cavity section being connected；It is vertically installed with the Dual-Phrase Distribution of Gas olid entrance being connected with its inner cavity on the side wall of cylindrical section main body, is connected for the fluidizing chamber end with powder storage tank, flows into Dual-Phrase Distribution of Gas olid in cylindrical section main body；Cylindrical section main body is also connected with external air source.Not only it can realize that gas-particle two-phase transported the reliable and stable simulation of downstream environment back pressure, but also can realize recycling and reusing to powder granule.
Description
Technical field
The invention belongs to powder technical field of engines, and in particular to a kind of simulation of Dual-Phrase Distribution of Gas olid transport environment pressure
Method and device.
Background technique
Powder engine is a kind of using powder particle as the new engine of fuel, has what repeatedly starting was adjusted with thrust
Function.In powder engine working process, powder particle is that Dual-Phrase Distribution of Gas olid is formed under fluidized gas entrainment effect from storage tank
It flows out into combustion chamber.Due to the complexity of process of pneumatic transmission two-phase flow, powder mass flow often with fluctuation, causes
There are certain deviations between actual flow and design discharge.So it is first right to need before carrying out the hot igniting experiments of engine
Powder propellant flow rate carries out cold conditions calibration, while design discharge when to enable powder mass flow as far as possible close to fired state, then
It is required that the pressure atmosphere in powder conveying exit is answered adjustable, i.e., corresponding back pressure simulator need to be designed to simulate ignition operation shape
Combustion chamber pressure when state.
In Marine Sciences field, in order to shorten the lead time of new equipment, development cost is reduced, reduces real navigation test
With sea trial with external loss, it usually needs Underwater Pressure simulator completes the simulation of Underwater Pressure[1].The device passes through
The Underwater Pressure environment of variation is provided in laboratory environment to test by the water pressure resistance performance of testpieces, the size master of pressure
It to be a kind of enclosed pressure simulation chamber by servo-hydraulic control.It is carried out to gas-particle two-phase conveying back pressure environment
When simulation, it is necessary to a leakage port be installed so that the pressure of simulator is stablized, therefore existing Underwater Pressure simulator
It is not suitable for Dual-Phrase Distribution of Gas olid environment.
In aviation field, the development of aircraft needs to be grasped pressure in cockpit and complies with the changing rule of flying height
Cabin pressure schedule meets the requirement of member's comfort level.In order to obtain this rule, atmospheric pressure boiler-plate is generallyd use to carry out
Scientific research[2-3].Since the device is mainly used for simulating the atmospheric environment of different height, it is generally less than so it simulates pressure
1atm is not particularly suited for the simulation of hyperbaric environment, while in order to keep boiler-plate internal pressure strong stability, which can be equipped with exhaust
Valve, and what the exhaust valve was designed generally be directed to gas, so not being suitable in Dual-Phrase Distribution of Gas olid.
In automotive engine applications, in order to study the fan duty of high altitude low air pressure internal combustion engine, it is usually also required to one
Back pressure simulator.The device is generally made of exhaust tube of pressure-stabilizing, vacuum evacuation device and exhaust pressure regulator valve etc., the different seas of analog
The atmospheric pressure for degree of lifting supports the development of internal combustion engine fan clutch attribute testing, but the device is not particularly suited for high pressure
The simulation of environment, how by gas-particle two-phase flow separation when similarly there is exhaust pressure stabilizing.
To sum up, existing pressure simulation device is primarily directed to pure in the environment under low pressure simulation either closing chamber of pure gas phase
Phase autoclave simulation, only plays its pressure dummy activity in its applicable field, so being not particularly suited for gas-solid two well
The mutually hyperbaric environment of stream environment conveying.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of Dual-Phrase Distribution of Gas olid
The simulator and method of transport environment pressure can both realize that gas-particle two-phase transported the reliable and stable simulation of downstream environment back pressure,
Again recycling and reusing can be realized to powder granule.
In order to solve the above technical problems, the technical solution adopted by the present invention is that, a kind of Dual-Phrase Distribution of Gas olid transport environment pressure
Simulator, from top to bottom include being sequentially connected to connect and the internal gas vent cone section being connected, cylindrical gas vent
Straight section and cylindrical section main body, it is cone shape that gas vent, which bores section, and front end offers gas vent；Gas vent straight section it is straight
Diameter is less than the diameter of cylindrical section main body；Cylindrical section body rear is also connected with the internal powder collection cavity section being connected；In cylindrical section master
The Dual-Phrase Distribution of Gas olid entrance being connected with its inner cavity is vertically installed on the side wall of body, for the fluidizing chamber end with powder storage tank
It is connected, flows into Dual-Phrase Distribution of Gas olid in cylindrical section main body；Cylindrical section main body is also connected with external air source.
Further, which is inverted cone shape, and offers dust outlet, dust outlet at the tip of cone
It is blocked by dismountable dust outlet plug.
Further, which is connected between cylindrical section main body by columnar group section, and in gas
It exports straight section and group section junction and the cavity lane within the cavity that is covered in is provided with sieve powder net, covered on the net in sieve powder
There is porous metals pressing plate.
Further, the gas vent top of gas vent cone section is provided with the restriction orifice of annular, annular opening
It is corresponding with gas vent position, and the diameter of annular opening is less than the diameter of gas vent；In restriction orifice top is equipped with
The orifice plate pressure cap of aperture at axis.
Further, the survey wedge (9) being connected with inside it is provided in cylindrical section body top.
Further, cylindrical section main part is provided with the suction nozzle communicated with cavity on this, for being connected with external air source
It is logical.
The invention also discloses a kind of analogy method of Dual-Phrase Distribution of Gas olid transport environment pressure, the analogy method is as follows: by
External air source is inflated through suction nozzle to cylindrical section main body, until closing external air source after simulation pressure；Then, the gas-solid in fluidizing chamber
Two phase flow is flowed into cylindrical section main body by Dual-Phrase Distribution of Gas olid entrance, and fluidized gas is flowed out by restriction orifice upwards, and keeps current limliting
The gas flow of orifice plate outflow is equal with the flow for the fluidized gas that Dual-Phrase Distribution of Gas olid entrance flows into；Adjust the gas-solid in fluidizing chamber
The flow of two phase flow so that gas carry solid powder amount reach setting value to get gone out in the case where simulating pressure by fluidizing
The flow of the fluidized gas flowed out in chamber；The flow is the stream of fluidized gas required when identical with simulation pressure in burner
Amount；Meanwhile the pulverized fuel particle in Dual-Phrase Distribution of Gas olid under 11 inner wall barrier effect of gravity and cylindrical section main body to sinking
It is down to powder collection cavity section.
The simulator and method of a kind of Dual-Phrase Distribution of Gas olid transport environment pressure of the present invention have the advantages that 1. both can be real
The reliable and stable simulation of existing gas-particle two-phase conveying downstream environment back pressure guarantees cold conditions calibration powder supply mass flowrate and hot point
Fire test is consistent, and can realize recycling and reusing to powder particle, saves experimental cost.2. can be realized gas-particle two-phase transfer rings
The reliable and stable simulation of border pressure, simulated pressure simulate pressure stability reachable ± 1% up to 5MPa or more, meet powder hair
The operating pressure of motivation.
Detailed description of the invention
Fig. 1 is the analogy method of Dual-Phrase Distribution of Gas olid transport environment pressure of the invention and the structural schematic diagram of device；
Fig. 2 is the setting structure schematic diagram between restriction orifice and orifice plate pressure cap of the invention；
Fig. 3 is porous metals pressing plate in the present invention and sieve powder net and the structural schematic diagram of setting；
Fig. 4 is powder particle cold conditions calibration experiment system diagram；
Fig. 5 is that magnesium-based powder particle cold conditions calibration magnesium-based pulverized fuel cold conditions calibration experiment result is bent in specific embodiment
Line chart.
Wherein: 1. Dual-Phrase Distribution of Gas olid entrances, 2. restriction orifices, 3. orifice plate pressure caps, 4. gas vents cone, 5. gas vents
Straight section, 6. porous metals pressing plates, 7. sieve powder nets, 8. group sections, 9. survey wedge, 10. suction nozzles, 11. cylindrical section main bodys, 12. collection
Powder chamber section, 13. dust outlet plugs, 14. powder storage tanks, 15. simulators, 16. gas cylinders, 17. test macros, 18. draw high position
Displacement sensor, 19. driving chamber pressure sensors, 20. driving gas circuit magnetic valves, 21. fluidisation gas circuit magnetic valves, 22. simulators
Gas circuit magnetic valve, 23. simulator pressure sensors, 24. pistons, 25. fluidizing chamber pressure sensors.
Specific embodiment
A kind of simulator of Dual-Phrase Distribution of Gas olid transport environment pressure of the present invention, as shown in Figure 1, from top to bottom including successively
It is connected and the internal gas vent being connected bores section 4, cylindrical gas vent straight section 5 and cylindrical section main body 11, gas goes out
Prostomum section 4 is cone shape, and front end offers gas vent；The diameter of gas vent straight section 5 is less than cylindrical section main body 11
Diameter；11 rear end of cylindrical section main body is also connected with the internal powder collection cavity section 12 being connected；It hangs down on the side wall of cylindrical section main body 11
It directly is provided with the Dual-Phrase Distribution of Gas olid entrance 1 being connected with its inner cavity, is connected for the fluidizing chamber end with powder storage tank, makes gas
Fixed double phase flow flows into cylindrical section main body 11；Cylindrical section main body 11 is also connected with external air source.Gas vent bores section 4 and gas
Pass through flanged joint between outlet straight section 5.
It is connected between gas vent straight section 5 and cylindrical section main body 11 by columnar group section 8, to realize Dual-Phrase Distribution of Gas olid
Further separation, in gas vent straight section 5 and 8 junction of group section and the cavity lane within the cavity that is covered in is provided with
Sieve powder net 7.Porous metals pressing plate 6 is covered on sieve powder net 7.Pass through flanged joint between gas vent straight section 5 and group section 8,
Porous metals pressing plate 6 and sieve 7 edge of powder net are placed between two flanges.Gas vent bores the gas vent top setting of section 4
There is the restriction orifice 2 of annular, annular opening is corresponding with gas vent position, and the diameter of annular opening is less than gas vent
Diameter；The orifice plate pressure cap 3 of aperture at axis is equipped on 2 top of restriction orifice.Meanwhile sieve powder net 7 is set, prevent micro powder
Particle clogging flow restriction orifice plate 2 guarantees that the intracorporal pressure of chamber is stablized.It is provided on 11 top of cylindrical section main body and is passed for placement force
The survey wedge 9 of sensor.
For convenience of powder particle collection, powder collection cavity section 12 is inverted cone shape, and offers powder at the tip of cone and go out
Mouthful, dust outlet is blocked by dismountable dust outlet plug 13.A powder catcher can be placed below powder collection cavity section 12,
Dust outlet plug 13 is dismantled, powder particle then slides along cone inner wall into powder catcher under the effect of gravity, thus
The recycling and reusing of powder particle can be achieved.
Gas pressure intensity simulator in the prior art generally only need to just guarantee that device internal pressure is steady using exhaust valve
It is fixed, but be not suitable in Dual-Phrase Distribution of Gas olid, that this is mainly due to powder particle partial sizes in Dual-Phrase Distribution of Gas olid is small, inertia is big and with
Fluidity is poor, and exhaust valve is easy to cause to block, unstable so as to cause device internal pressure.
Basic principle of the invention is to first pass through suction nozzle 10 to cylindrical section before the fluidizing chamber of powder storage tank is started to work
Stop inflation after being inflated to simulation pressure in main body 11, then high pressure fluidizing gas carries powder particle and flows into via gas-particle two-phase
Mouth section 1 enters cylindrical section main body 11, since 11 cross-sectional area of cylindrical section main body is bigger than 1 section of sectional area of gas-particle two-phase inflow entrance, institute
Deceleration can be expanded by entering cylindrical section main body 11 with gas, air-flow in the cavity with pass through sieve powder under the action of ambient pressure environment difference
Net 7 is discharged via restriction orifice 2, since gas-particle two-phase flows into the equal institute of gas output of the air inflow and restriction orifice 2 of 1 entrance of section
Stablized with inside cavity pressure；Pulverized fuel particle can keep entrance velocity to travel forward until and cylinder since inertia is larger
Section 11 inner wall of main body bumps against, and be impacted influence, and powder particle movement velocity rapid drawdown, pulverized fuel particle is in gravity and circle at this time
Collection powder cone section 12 is settled down under 11 inner wall barrier effect of shell of column main body downwards, the powder particle being collected into is reusable.
The present invention is worked as by being designed using size of the aerodynamics relative theory knowledge to restriction orifice 2
The gas flow and chamber pressure that gas-particle two-phase flows into 1 entrance of section are jammed theoretical flow calculation formula to timing according to gas, meter
Calculation obtains 2 size of restriction orifice.And make gas-solid two using the big feature of the sudden expansion expansion of gas and powder particle inertia
The gas phase of Xiang Liuzhong is slowed down after entering cavity, and particle continues insurance in succession and holds entrance velocity advance, to realize Dual-Phrase Distribution of Gas olid
Initial gross separation.Simultaneously multi-deck screen powder net 7 is installed above cavity, further gas-particle two-phase is separated, it is micro- to prevent
Small powder particle clogging flow restriction orifice plate 2 guarantees that the pressure in back pressure simulator is stablized.Restriction orifice 2 is an annulus featheredge, a set of
The mating multiple outlets of simulator restriction orifice 2 of different sizes, with when adjusting flow, replacement selects suitable size
Restriction orifice 2.
The invention also discloses the analogy method that above-mentioned simulator is used for Dual-Phrase Distribution of Gas olid transport environment pressure, the simulations
Method is as follows: being inflated from external air source through suction nozzle 10 to cylindrical section main body 11, until closing external air source after simulation pressure；So
Afterwards, the Dual-Phrase Distribution of Gas olid in fluidizing chamber is flowed into cylindrical section main body 11 by Dual-Phrase Distribution of Gas olid entrance 1, and fluidized gas is upwards by current limliting
Orifice plate 2 flows out, and adjusts the size of the outlet of restriction orifice 2, keeps the gas flow and Dual-Phrase Distribution of Gas olid of restriction orifice (2) outflow
The flow for the fluidized gas that entrance 1 flows into is equal；The flow of the Dual-Phrase Distribution of Gas olid in fluidizing chamber is adjusted, so that gas carrying is consolidated
Body amount of powder reach setting value to get gone out in the case where simulating pressure by the flow of the fluidized gas flowed out in fluidizing chamber；Meanwhile gas
Pulverized fuel particle in fixed double phase flow is settled down to downwards powder collection cavity under 11 inner wall barrier effect of gravity and cylindrical section main body
Section 12.The flow of the fluidized gas is obtained, driving chamber is obtained by the equation of gas state further according to the pressure value of each sensor monitoring
Interior gas flow.When being used for real engine combustion chambers burn, for obtain in simulator when identical pressure, it is above-mentioned
The flow of fluidized gas is the flow of fluidized gas needed for burner, the parameter value as combustion chamber.Meanwhile correspondence is also obtained
Driving chamber in gas flow.
The ability and stability that gas-particle two-phase transports downstream environmental stress are simulated to verify back pressure modeling scheme of the invention,
It provides following gas-particle two-phase and transports terminal back pressure modeling scheme-magnesium-based powder particle cold conditions calibration experiment, in magnesium-based powder particle
Relevant parameter real-time monitoring and acquisition have been carried out in cold conditions calibration experiment to it, under specifically entering:
Experimental system is as shown in figure 4, powder storage tank 14 is horizontally set on test-bed, coaxial sleeve in powder storage tank 14
Equipped with piston 24, cavity is divided into the fluidizing chamber and driving chamber that two are independently arranged from top to bottom, and fluidizing chamber front end is cone shape,
The front end of fluidizing chamber and the rear end of driving chamber are corresponding on each pipeline to be equipped with fluidisation gas circuit magnetic valve with 16 pipeline connection of gas cylinder
21 and driving gas circuit magnetic valve 20, to control the flow of corresponding gas.The cylindrical section main body 11 and gas cylinder 16 of simulator 15
Piping connection is equipped with quasi- device gas circuit magnetic valve 22, cone front end and 1 phase of Dual-Phrase Distribution of Gas olid entrance of fluidizing chamber on pipeline
Connection.
It is connected with displacement sensor for pull rope 18 on piston 24, pacifies respectively at the driving chamber and fluidizing chamber on powder storage tank 14
Equipped with driving chamber pressure sensor 19 and fluidizing chamber pressure sensor 25, simulator pressure sensing is installed on simulator 15
Device 23, each monitoring device are connected with test macro 17, test macro 17 be it is known, be installed in computer.
Experimental situation temperature 300K, the simulation pressure size of simulator 15 are 5MPa, Dual-Phrase Distribution of Gas olid entrance 1 into
Tolerance is 10g, and 2 diameter of restriction orifice of design is 1.05mm.Powder particle selects magnesium-based pulverized fuel, in back pressure
Powder stable supplying 6s under 5.2MPa environment.Curve graph shown in fig. 5, i.e. magnesium-based pulverized fuel cold conditions mark are obtained by monitoring data
Determine experimental result curve graph, as seen from the figure, the basic held stationary of the back pressure simulated in whole work process, stabilization sub stage back pressure
Stability is within ± 1%.
Claims (6)
1. a kind of simulator of Dual-Phrase Distribution of Gas olid transport environment pressure, which is characterized in that from top to bottom include be sequentially connected connect,
And internal gas vent cone section (4) being connected, cylindrical gas vent straight section (5) and cylindrical section main body (11), the gas
Body outlet cone section (4) is cone shape, and front end offers gas vent；The diameter of the gas vent straight section (5) is less than circle
The diameter of shell of column main body (11)；Cylindrical section main body (11) rear end is also connected with the internal powder collection cavity section (12) being connected；
The Dual-Phrase Distribution of Gas olid entrance being connected with its inner cavity is vertically installed on the side wall of the cylindrical section main body (11)
(1), it is connected for the fluidizing chamber end with powder storage tank, flows into Dual-Phrase Distribution of Gas olid in cylindrical section main body (11)；The cylinder
Section main body (11) is also connected with external air source.
2. a kind of simulator of Dual-Phrase Distribution of Gas olid transport environment pressure according to claim 1, which is characterized in that described
Powder collection cavity section (12) is inverted cone shape, and offers dust outlet at the tip of cone, and the dust outlet passes through detachable
Dust outlet plug (13) block.
3. a kind of simulator of Dual-Phrase Distribution of Gas olid transport environment pressure according to claim 1 or 2, which is characterized in that
The gas vent straight section (5) is connected between cylindrical section main body (11) by columnar group section (8), and is gone out in the gas
Mouthful straight section (5) and group section (8) junction and it is within the cavity be covered in cavity lane and be provided with sieve powder net (7), in the sieve
Porous metals pressing plate (6) are covered on powder net (7).
4. a kind of simulator of Dual-Phrase Distribution of Gas olid transport environment pressure according to claim 1 or 2, which is characterized in that
The gas vent top of gas vent cone section (4) is provided with the restriction orifice (2) of annular, annular opening and gas vent
Position is corresponding, and the diameter of annular opening is less than the diameter of gas vent；It is equipped at axis on the restriction orifice (2) top
The orifice plate pressure cap (3) of aperture.
5. a kind of simulator of Dual-Phrase Distribution of Gas olid transport environment pressure according to claim 1 or 2, which is characterized in that
Upper cylindrical section main body (11) portion is provided with the suction nozzle (10) communicated with cavity, for being connected with external air source.
6. simulator as claimed in one of claims 1-5 is used for the analogy method of Dual-Phrase Distribution of Gas olid transport environment pressure,
It is characterized in that, the analogy method is as follows: being inflated from external air source through suction nozzle (10) to cylindrical section main body (11), until simulation pressure
External air source is closed after strong；
Then, the Dual-Phrase Distribution of Gas olid in fluidizing chamber is flowed into cylindrical section main body (11) by Dual-Phrase Distribution of Gas olid entrance (1), fluidized gas
It is flowed out upwards by restriction orifice (2), the gas flow of restriction orifice (2) outflow and Dual-Phrase Distribution of Gas olid entrance (1) is kept to flow into
Fluidized gas flow it is equal；The flow of the Dual-Phrase Distribution of Gas olid in fluidizing chamber is adjusted, so that the solid powder amount that gas carries reaches
To setting value to get gone out in the case where simulating pressure by the flow of the fluidized gas flowed out in fluidizing chamber；
Meanwhile the pulverized fuel particle in Dual-Phrase Distribution of Gas olid under 11 inner wall barrier effect of gravity and cylindrical section main body to sinking
It is down to powder collection cavity section (12).
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| CN201910101018.3A CN109870390A (en) | 2019-01-31 | 2019-01-31 | A kind of analogy method and device of Dual-Phrase Distribution of Gas olid transport environment pressure |
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Application publication date: 20190611 |