CN1267685C - Multi-tube jetting oscillating refrigerator and its refrigeration method - Google Patents
Multi-tube jetting oscillating refrigerator and its refrigeration method Download PDFInfo
- Publication number
- CN1267685C CN1267685C CN 200410021388 CN200410021388A CN1267685C CN 1267685 C CN1267685 C CN 1267685C CN 200410021388 CN200410021388 CN 200410021388 CN 200410021388 A CN200410021388 A CN 200410021388A CN 1267685 C CN1267685 C CN 1267685C
- Authority
- CN
- China
- Prior art keywords
- gas
- jet
- multitube
- refrigeration
- movement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title abstract description 18
- 230000010355 oscillation Effects 0.000 claims abstract description 40
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 11
- 210000004907 gland Anatomy 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000006757 chemical reactions by type Methods 0.000 claims 1
- 230000035939 shock Effects 0.000 abstract description 20
- 230000000737 periodic effect Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 230000003993 interaction Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 82
- 230000008569 process Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/06—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders
- F25B9/065—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using expanders using pressurised gas jets
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The present invention relates to a multi-tube jet oscillation refrigerator and a refrigeration method thereof, which belongs to the technical field of pressure gas jet engineering and expansion refrigeration. The refrigerator is in a stationary state during work and is suitable for the processing of high pressure small flow gas working media. The present invention realizes the purpose of refrigeration and cooling by using the combination of the hot and cold effect and the jet oscillation technique. The present invention has the advantages of no rotation elements, no external power drive and complete use of gas pressure to realize gas expansion and refrigeration, and is mainly composed of a main frame body, a stationary jet nozzle, oscillation reception tubes, a sonic oscillator, etc. Periodic deflection and jet of gas are realized by the combined action of a gas distributor and the sonic oscillator; high frequency oscillation flow can be generated by the periodic and intermittent jet in the reception tubes with a divergent periphery, and through the interaction and the influences of the wave systems of shock waves, compression waves and expansion waves, unsteady expansion work and energy conversion are completed so as to realize the gas refrigeration. The refrigerator with simple structure and continuous and adjustable flow rate is suitable for gas-liquid two-phase working medium occasions and is energy saving.
Description
Technical field
The invention belongs to the jet engineering and the swell refrigeration technical field of pressed gas.
Background technology
(Chinese patent 87101903.5 such as air wave refrigerating device and heat separator, 89213744.4,96115022.X etc.), all belong to once and unsteadiness swell refrigeration repeatedly, and all be to rely on motor-driven or utilize the pressure differential of gas to drive the gas distributor spin, with certain rotary speed with dielectric gas successively to encircling the adopter jet of each circumferential endcapped, make the resident gas in the pipe do the unsteadiness expansion work. turbo-expander is realized refrigeration especially under high rotating speed.The refrigerating efficiency of these refrigeration machines is all higher, but because structure is generally comparatively complicated, there are many tumblers inside, for the gas blending before and after preventing to freeze and leak, generally all be provided with various forms of movable sealings and external seal, this just makes such machine carrying compression capability reduce greatly.Development along with the gas gathering and transportation technology, the processing of natural gas develops to the high pressure direction, need reliable gases at high pressure swell refrigeration technical equipment as support, high-pressure low-flow, the reliable and stable refrigerating plant of behavior in service are also needed in the recovery of tail gas and utilization badly in large quantities of in addition chemical plant, the chemical fertilizer factory's production process.
Summary of the invention
Purpose of the present invention just provides a kind of simple in structure, simple and convenient operation and maintenance, stable and reliable operation, is suitable for the multitube fluidic oscillation refrigeration machine and the refrigerating method thereof of handle high voltages gas medium.
Technical conceive of the present invention is: mainly the structure by the fluidic oscillation refrigeration machine realizes the fluidic oscillation of gas and utilizes shock wave oscillating tube cold-thermal effect to reach the purpose of refrigeration.
The present invention utilizes static gas distributor---and jet nozzle and sonic oscillator acting in conjunction realize periodic deflection, the jet of gas, inject to resting period property uniform adopter on every side.The fluidic oscillation refrigeration machine is mainly by nozzle, adopter and gas distributor-sound oscillator is formed, the fluidic oscillation process is to utilize the attached wall of fluid in the attached wall elements of bistable, switching characteristic and pulsating wave are finished in cavity volume and ducted response and propagation characteristic, in the jet engineering, be used to produce fluid control fluctuating signal, sonic oscillator produces pressure fluctuation signal, under the fluctuating signal effect, the air-flow of nozzle ejection is periodically mopped up between two sonic oscillators, the realization air-flow is intermittently injected the vibration adopter with certain frequency, injecting in the half period, circulating air in the compressional oscillation pipe, inject in the half period non-, discharge oscillating tube from the gap of fluid diode, and discharge from outlet.
The fluidic oscillation source is the basis of fluidic oscillation refrigeration machine work.The present invention forms oscillation source by the switching of attached wall bistable unit, and following several form is arranged: load type vibration, the vibration of positive feedback formula, acoustic wave vibration.
A) load type vibration: owing to exist (the big I change of load) of load, output stream can not monolaterally be kept but alternately switching generation of the right and left frequency shift owing to flow resistance variation, pressure change make attached jet.
B) positive feedback formula vibration: delivery outlet and homonymy control hole are fed back, and in forming the vibration that comes and goes alternately switching, feedback signal causes that jet switches.The pressure signal that switches need have certain intensity, and feedback mouth of pipe footpath size is bigger to the size influence of frequency.
C) acoustic wave vibration: be that control hole with both sides couples together, the pressure when switching repeatedly changes by the feedback pipe and is delivered to offside and causes the continuous switching of jet.This form FREQUENCY CONTROL is stable, and outlet does not have the influence of fluid capacitance and flow resistance.
Because fluidic oscillation refrigeration machine operate as normal need have metastable frequency of oscillation, guarantee as far as possible that simultaneously the influence of outlet fluid capacitance and flow resistance is less, according to the characteristics of each oscillator, selects for use the acoustic wave oscillator more reasonable.Sonic oscillator have stable performance, reliable, operate easy characteristics, and can realize the higher-order of oscillation, can reach 700HZ, this is that rotary ripple refrigeration machine is difficult to realization.
The mobile jet engineering that reaches in machine intimate flow field is by aerodynamics analog computation design among the present invention, and by validation trial, exploitation and the performance evaluation of multiple novel jet flow element with vibration chamber shape, guarantees stable isentropic efficiency; Further investigation and numerical analysis by jet flow field, vibration mechanism can draw following result:
1. the size of frequency of oscillation influences the distribution of tube wall temperature, just, influence simultaneously to what of extraneous distribute heat, and be one of principal element that influences machine efficiency.
2. in oscillatory process, be accompanied by the variation of gas temperature, simultaneously tube wall temperature distributes by certain rule gradually from normal temperature and since its body with the film coefficient of heat transfer between pipe much smaller than the thermal conductivity factor between the metallic walls, stable back tube wall temperature is the definite value along certain curve distribution basically;
3. owing to the existence of thermograde, heat is dispersed into the external world in a large number along tube wall, and the part heat axially turns back in the cold air along tube wall simultaneously;
4. certain fixed point in pipe, near the vibration this point of gas particle, temperature, pressure are periodicity transformation.
The present invention has realized that the unsteadiness of pressed gas in machine expands in the machine construction design.During machine works, the import supplied materials gas that has pressure quickens by nozzle expansion, spray at a high speed by jet expansion, under the effect of gas distributor, periodically inject according to this in the vibration adopter of the long endcapped of many radicals rice that the place ahead radiation arranges, gas accepts to inject the pressure energy of gas in managing under the effect of periodicity exciting, and finish by the interaction of wave system-shock wave, compressional wave and dilatational wave that unsteadiness expands and power conversion, realize gas refrigeration.
This process can vividly describe to as follows:
(a) inject the stage.The moment of a certain adopter of high velocity air directive, original stagnating deposited formation one contact-making surface between the gas in live gas of injecting and the adopter, and this contact-making surface can be considered " piston " of a no quality; Because contact-making surface both sides speed and pressure are all unequal, for satisfying contact-making surface consistency condition (speed and the pressure that are contact-making surface both sides gas equate), should " piston " travel forward, the shock wave of equidirectional motion will appear in the place ahead of " piston ".
(b) exothermic phase.Shock wave produces and inswept part, and gas is compressed continuously, and temperature and pressure improves, and through multiply periodic effect, gas temperature raises gradually in the pipe, and by the tube wall heat radiation, finishes power conversion.Owing to inject gas to gas expansion working in managing, according to the first law of thermodynamics, to inject the gas total energy and descend, temperature reduces.
(c) exhaust phase.Under the acting in conjunction in gas distributor and fluidic oscillation source, jet deflection stops to emanate in pipe, because the pipe internal pressure is injected gas reverse flow outlet spout greater than the pipe external pressure in the pipe, goes out outside the machine to fail after gathering, and finishes a kind of refrigeration cycle.
Technical solution of the present invention is that a kind of multitube fluidic oscillation refrigeration machine is made up of vibration adopter (1), body (3), sonic oscillator (8) and jet nozzle parts such as (9); Body (3) is gone up near nozzle (9) one sides and is provided with inlet channel (10), the split channel (7) that is provided with in the both sides of inlet channel (10) is connected with two sonic oscillators (8), 35 °～45 ° of being all of the angle symmetry of two split channel (7) center lines and middle inlet channel (10) centreline space; Movement (6) is by jet nozzle (9), exhaust passage (18), the shunting baffle (19) of oscillator interface channel (20) and separate gas stream trend constitutes, place in the movement chamber, between movement and body chamber, adopt lead sealing method to prevent that inside from collaborating mutually, and be fastenedly connected with body (3) by the sealing gland (12) that has O shape circle (13) on movement top, the sealing internals, the exhaust passage 18 that is provided with 2 ventholes (5) on the both sides of movement (6) and is communicated with body inner cavity chamber 11, the cold air of locating to be provided with two logical cold air collecting chambers below near its interface is collected and is taken over 15, through cold air collect take over (15) be connected to be provided with outside the collecting chamber (16) of outlet (11); Be provided with 3～15 long 500～600mm, wide 6～10mm, dark 60～80mm in the body (3), the cross section is the jet runner (4) of rectangle, jet runner (4) is divergent shape and distributes, near spacing between the runner of movement (6) one ends is convergent, to injecting the spacing of distinguishing end-fire stream runner (4) is 1～3mm, jet nozzle (9) adopts the Laval nozzle pattern, the other end port form of jet runner (4) is circular, is that the vibration adopter (1) of 4～12m is connected by fittings body (2) and length.
Body (3) is a plank frame, and thickness is 100～120mm.
Vibration adopter (1) is a seamless steel pipe.
Vibration adopter (1) is seamless finned tube.
Vibration adopter (1) is taked to draw in and leave arranging of interval and is fastened on the frame.
Vibration adopter (1) is taked that pipe is coiled into helix and is fixed on the frame.
The shape of jet expansion is identical with steady flow segment, and the jet hole position that arrives of protracting is the movement center.
Be used for separating the shunting baffle of sonic oscillator interface channel and cold air exhaust passage, its protrusive position is changed to the line of the center line of two runners that keep to the side most in all jet runners to movement.
Use the method that a kind of multitube fluidic oscillation refrigeration machine freezes to be: periodic deflection, the jet of realizing gas by jet nozzle and sonic oscillator acting in conjunction, be in the adopter of divergent shape around injecting to periodic intermittent, can produce higher-order of oscillation stream, and the reciprocation by wave system-shock wave, compressional wave and dilatational wave and influence finish unsteadiness expand acting and power conversion, realizes gas refrigeration.The course of work is:
The fluidic oscillation process at first is that compressed gas quickens by nozzle expansion, is then to utilize attached wall, switching characteristic and the pulsating wave of the attached wall elements of bistable that matches suitable intermittent jet in cavity volume and ducted response and propagation characteristic execution cycle property.This moment, gas sprayed at a high speed from nozzle, injected successively in the adopter that respectively vibrates, and the gas of injecting forms a contact-making surface with the interior gas of pipe.This interface is equivalent to one " piston ", and it enters and discharge and reciprocating with gas, because the distribution of gas is only finished in moment, promptly compressed gas constantly has the compression disturbance to original gas, thereby constantly has shock wave and dilatational wave to produce.The inswept part of shock wave, gas is compressed, and temperature and pressure improves, and makes adopter form hot chamber.A branch of dilatational wave produces when producing with shock wave, acts on the gas behind the contact-making surface, makes the cooling of expanding of this portion gas, forms cold chamber.
Jet nozzle is emanated to this adopter and is closed the adopter openend after finishing, because the gas between the contact-making surface and the mouth of pipe travels forward with " piston ", the mouth of pipe closes suddenly to close and makes air velocity drop to zero suddenly, cause producing a branch of right lateral dilatational wave at mouth of pipe place, the mouth of pipe and contact-making surface gas are further expanded, static temperature descends, and gas in the further compressed pipe of shock wave.At this moment, shock wave is supplied with by the gas between the mouth of pipe and the contact-making surface the energy of gas work done, and this portion gas stagnation temperature is descended.When the adopter mouth of pipe and the connection of low-pressure gas blast pipe, enter exhaust phase.Because adopter external and internal pressure imbalance, there is a branch of dilatational wave to reach in the pipe again simultaneously, make that the gas static temperature descends once again between the mouth of pipe and contact-making surface, become outside the cold air delivery pipe, when cold air drained, contact-making surface arrived the mouth of pipe.Exhaust finishes a working cycles after stopping, and the gas that is heated by shock wave dispels the heat to the external world by tube wall.Parameter is: 100～400 ℃ of 1～50Mpa, body-80～0 ℃, adopter.
The beneficial effect that the present invention reached is:
1. simple in structure: the fluidic oscillation refrigeration machine does not have motor-driven, and its working gas distributor work is promoted and cooperated by sonic oscillator to realize, so no any revolving part on the machine, does not need special management during machine run.
2. the cycle of operation is long: because therefore part without spin on the machine does not have consumable accessory, as static equipment, life cycle is long during use, need not to maintain.
3. adaptability is strong: be applicable to the gas-liquid two-phase occasion, allow the band liquid measure big, in high pressure and low discharge occasion, when general refrigerating machine can't normally use, the fluidic oscillation refrigeration machine still can finely turn round.
4. the higher-order of oscillation: utilize sonic oscillator can realize the higher-order of oscillation, can reach 700HZ, this is that various rotary type cold machines are difficult to realize, has guaranteed the efficient of machine.
5. flow is adjustable continuously: fluidic oscillation refrigeration machine Flow-rate adjustment is simple as valve, so this machine is applicable to that forming difference, flow, pressure and expansion ratio fluctuates in a big way.
6. valency is low, energy-conservation: because of simple in structure, under the condition that guarantees use, can save and open money in a large number.Owing to do not need external impetus to drive, therefore, still can finely use for the occasion of condition harshnesses such as outside outlying district or short of electricity.
7. high pressure, a low discharge natural gas swell refrigeration difficult problem have been solved.Isentropic efficiency reaches as high as 45%.
Description of drawings
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is a structure diagram of the present invention.
Fig. 2 is the structural representation sketch of movement of the present invention and jet nozzle.
Fig. 3 is a sonic oscillator schematic diagram of the present invention.
Fig. 4 is a wall-attachment bistable unit schematic diagram of the present invention.
Fig. 5 is a shock wave oscillating tube refrigerating method schematic diagram of the present invention.
Fig. 6 is a shock wave oscillating tube refrigerating method schematic diagram of the present invention.
Fig. 7 is a shock wave oscillating tube refrigerating method schematic diagram of the present invention.
Among the figure, 1. adopter, 2. fittings body, 3. body, 4. runner, 5. gas outlet, 6. movement, 7. split channel, 8. sonic oscillator, 9. jet nozzle, 10. air inlet, 11. body inner cavity chamber, 12. glands, 13. sealing ring, 14. studs, 15, cold air is collected and is taken over, 16. collecting chambers, the outer outlet of 17. machines; 18. the exhaust passage, 19. baffles, 20. oscillator interface channels, 21. jet nozzles, 22. sonic oscillators, 23. contact-making surfaces, 24. shock waves, 25. right lateral dilatational waves.
The specific embodiment
A kind of multitube fluidic oscillation refrigeration machine mainly is made up of body (3), vibration adopter (1), movement (6), sonic oscillator (8), jet nozzle (9) etc.
Body (3) is to be processed by the sheet metal that is of a size of 100～120mm thickness, mill out 3～15 long 500～600mm of being, the wide 6～10mm of being downwards respectively, be 60～80mm deeply in the surface from it according to the size for the treatment of capacity, the cross section is the jet runner (4) of rectangle, be processed with the single order halfpace in the runner, be the panel location usefulness of specializing in welding encapsulation runner, and so as to guaranteeing channel size.The runner overall distribution is divergent shape, is convergent near spacing between the runner of movement (6) one ends, is generally 2mm to the spacing that injects district's one end runner, is wedge between each runner and narrows shape, and this will help jet nozzle (9) and emanate and fully be not obstructed.Nozzle generally adopts the Laval nozzle pattern, the other end of all runners then carries out the transition to circle according to what the runner radical processed equal number by rectangle on the body, it is so-called old name for the Arabian countries in the Middle East ground circle, and with the interface shape that matches of vibration adopter (1) top connection body (2), and can weld or detachable connector is connected; The length of adopter (1) is generally chosen between 4～12 meters, caliber and pipe range all are to be determined by the speed of the size for the treatment of capacity and air-flow, material is chosen and has been taken into account conduction heat transfer performance and requirement of strength, because this machine generally will adapt to the high pressure occasion, the multiselect seamless steel pipe also can be selected seamless finned tube sometimes; Vibration adopter (1) is generally taked to draw in and leave arranging of interval and is fastened on the frame, also sometimes pipe is coiled into helix and fixes, and purpose all is in order to reduce space, ground, station.Be provided with air inlet (10) in the end face center of Fig. 1 right side one end, normal temperature supplied materials gas without refrigeration enters in the refrigeration machine through this mouthful, be provided with two air feed in the both sides of air inlet and flow to passage (7) and the interface that returns, be connected with two sonic oscillators (8) by pipeline, and control the size of flow by intervening vaive.From up to down processed fixedly chamber of high accuracy of manufacture circle hole shape and half-open impermeable movement in the centre position of body right side part, to place movement (6) and jet nozzle (9), movement (6) both had been the jet nozzle of static form and the shunting shelves of separate gas stream trend, its refined structure as shown in Figure 2, movement (6) is designed to take out can free replacing form, so between movement and body chamber for preventing the leakage of collaborating mutually, the boring lead sealing has been implemented in many places, and be fastenedly connected the sealing internals with body (3) by the sealing gland (12) that has O shape circle (13) on movement top.Process on the both sides of movement (6) installation place two penetrating up and down circular holes of giving vent to anger (5) and with the interface channel of body inner cavity chamber, below close its interface, located to process respectively the steam vent of two logical cold air collecting chambers again, make cold air collecting chamber (16) in the cutaway view below adapter (15) is pooled to Fig. 1, outlet (17) will be through defeated use the outside the cryogenic gas of refrigeration outside machine again.Complete machine carries out Calculation of Strength Design by pressure-vessel, and concrete parameter generally has: pressure p scope: 25Mpa, temperature T scope: (1) body :-40 ℃; (2) adopter: 300 ℃.
Use the method that a kind of multitube fluidic oscillation refrigeration machine freezes to be: periodic deflection, the jet of realizing gas by jet nozzle and sonic oscillator acting in conjunction, be in the adopter of divergent shape around injecting to periodic intermittent, can produce higher-order of oscillation stream, and the reciprocation by wave system-shock wave, compressional wave and dilatational wave and influence finish unsteadiness expand acting and power conversion, realizes gas refrigeration.
The concrete course of work is that the example analysis is summarized as follows with the individual tubes:
The fluidic oscillation process at first is that compressed gas quickens by nozzle expansion, is then to utilize attached wall, switching characteristic and the pulsating wave of the attached wall elements of bistable that matches suitable intermittent jet in cavity volume and ducted response and propagation characteristic execution cycle property.This moment, gas sprayed at a high speed from nozzle, injected successively in the adopter that respectively vibrates, and the gas of injecting forms a contact-making surface with the interior gas of pipe.This interface is equivalent to one " piston ", and it enters and discharge and reciprocating with gas, because the distribution of gas is only finished in moment, promptly compressed gas constantly has the compression disturbance to original gas, thereby constantly has shock wave and dilatational wave to produce.The inswept part of shock wave, gas is compressed, and temperature and pressure improves, and makes adopter form hot chamber.A branch of dilatational wave produces when producing with shock wave, acts on the gas behind the contact-making surface, makes the cooling of expanding of this portion gas, forms cold chamber.
Jet nozzle is emanated to this adopter and is closed the adopter openend after finishing, because the gas between the contact-making surface and the mouth of pipe travels forward with " piston ", the mouth of pipe closes suddenly to close and makes air velocity drop to zero suddenly, cause producing a branch of right lateral dilatational wave at mouth of pipe place, the mouth of pipe and contact-making surface gas are further expanded, static temperature descends, and gas in the further compressed pipe of shock wave.At this moment, shock wave is supplied with by the gas between the mouth of pipe and the contact-making surface the energy of gas work done, and this portion gas stagnation temperature is descended.When the adopter mouth of pipe and the connection of low-pressure gas blast pipe, enter exhaust phase.Because adopter external and internal pressure imbalance, there is a branch of dilatational wave to reach in the pipe again simultaneously, make that the gas static temperature descends once again between the mouth of pipe and contact-making surface, become outside the cold air delivery pipe, when cold air drained, contact-making surface arrived the mouth of pipe.Exhaust finishes a working cycles after stopping, and the gas that is heated by shock wave dispels the heat to the external world by tube wall.
Claims (8)
1. multitube fluidic oscillation refrigeration machine is characterized in that, is made up of vibration adopter (1), body (3), sonic oscillator (8) and jet nozzle (9); Body (3) is provided with inlet channel (10) near nozzle (9) one sides, the split channel (7) that is provided with in the both sides of inlet channel (10) is connected with two sonic oscillators (8), and the angle of two split channel (7) center lines and middle inlet channel (10) centreline space is all 35 °～45 ° symmetrically; Movement (6) is by jet nozzle (9), exhaust passage (18), the shunting baffle (19) of oscillator interface channel (20) and separate gas stream trend constitutes, place in the body inner cavity chamber (11), and between movement (6) and body inner cavity chamber (11), sealing is set, and be fastenedly connected with body (3) by the sealing gland (12) that has O shape circle (13) on movement top, the sealing internals, the exhaust passage (18) that is provided with a steam vent (5) in movement (6) both sides respectively and is communicated with body inner cavity chamber (11), the cold air that is provided with two logical cold air collecting chambers (16) at place, the below of steam vent (5) is collected and is taken over (15), through cold air collect take over (15) be connected to be provided with outside the collecting chamber (16) of outlet (17); Processing from up to down is provided with the jet runner (4) that 3～15 long 500～600mm, wide 6～10mm, dark 60～80mm and cross section are rectangle on the body (3), jet runner (4) is divergent shape and distributes, near spacing between the runner of movement (6) one ends is convergent, to injecting the spacing of distinguishing end-fire stream runner (4) is 1～3mm, jet nozzle (9) adopts the Laval nozzle pattern, the other end cross section of jet runner (4) is circular, is that the vibration adopter (1) of 4000～12000mm is connected by fittings body (2) and length.
2. multitube fluidic oscillation refrigeration machine according to claim 1 is characterized in that body (3) is a plank frame, is made by the sheet metal that 100～120mm is thick.
3. multitube fluidic oscillation refrigeration machine according to claim 1 is characterized in that, vibration adopter (1) is a seamless steel pipe.
4. according to claim 1 or 3 described multitube fluidic oscillation refrigeration machines, it is characterized in that vibration adopter (1) is fixed on the frame.
5. multitube fluidic oscillation refrigeration machine according to claim 1 is characterized in that, the anterior position that arrives of nozzle exit is the movement center.
6. multitube fluidic oscillation refrigeration machine according to claim 1, it is characterized in that the protrusive position that is used for separating the shunting baffle (19) of sonic oscillator interface channel (20) and cold air exhaust passage (18) is changed to the line of the center line of two runners that keep to the side most in the jet runner (4) to movement (6) center.
7. multitube fluidic oscillation refrigeration machine according to claim 1 is characterized in that the inner chamber of sonic oscillator (8) is a hollow body, and Welding Structure is taken over for shrinking in the junction.
8, multitube fluidic oscillation refrigeration machine according to claim 1 is characterized in that, the structure of reaction type sonic oscillator (8) is manufactured by the hollow pipeline, and closing up in both sides, links to each other with two sonic oscillator passages of body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021388 CN1267685C (en) | 2004-03-12 | 2004-03-12 | Multi-tube jetting oscillating refrigerator and its refrigeration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021388 CN1267685C (en) | 2004-03-12 | 2004-03-12 | Multi-tube jetting oscillating refrigerator and its refrigeration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563856A CN1563856A (en) | 2005-01-12 |
| CN1267685C true CN1267685C (en) | 2006-08-02 |
Family
ID=34479803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410021388 Expired - Fee Related CN1267685C (en) | 2004-03-12 | 2004-03-12 | Multi-tube jetting oscillating refrigerator and its refrigeration method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1267685C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758051A (en) * | 2016-03-16 | 2016-07-13 | 大连理工大学 | Isolated gas wave tube with middle wave blocking cavity |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861748B (en) * | 2014-03-11 | 2016-02-24 | 大连理工大学 | Recommend external excitation formula fluidic oscillation generator |
| CN104180550B (en) * | 2014-07-16 | 2016-03-02 | 大连理工大学 | External excitation and concentrated dissipation Character of The Static Gas Wave Refrigerator |
| CN110186689A (en) * | 2019-05-22 | 2019-08-30 | 厦门大学 | A kind of assembly power multichannel nozzle test device |
| CN111306828B (en) * | 2020-03-30 | 2024-07-12 | 大连大学 | Self-exciting micro-jet controlled multitube oscillator |
-
2004
- 2004-03-12 CN CN 200410021388 patent/CN1267685C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758051A (en) * | 2016-03-16 | 2016-07-13 | 大连理工大学 | Isolated gas wave tube with middle wave blocking cavity |
| CN105758051B (en) * | 2016-03-16 | 2018-09-04 | 大连理工大学 | The isolated wave pipe of middle part wave arrestment chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1563856A (en) | 2005-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102606548B (en) | Radial-flow type fluidic pressure wave supercharger | |
| CN101097167A (en) | Multifunctional gas wave refrigerating jet stream field displaying apparatus and method for measuring | |
| CN101294751B (en) | Gas capacity variable frequency modulation self-excitation oscillation jet stream refrigerating machine | |
| CN1267685C (en) | Multi-tube jetting oscillating refrigerator and its refrigeration method | |
| JPH0933124A (en) | Multistage type pulse pipe refrigerator | |
| CN111397235B (en) | Frequency-adjustable sonic wave jet oscillator | |
| CN100398940C (en) | Air-wave refrigerator with single pipe and refrigerating method thereof | |
| WO2019091229A1 (en) | Built-in driving hydraulic balance type double-layer nozzle double-row tube gas wave refrigerator | |
| CN101294750B (en) | Feedback type oscillating jet stream refrigerating machine | |
| CN201443932U (en) | Detachable washable spraying ground source heat pump evaporator | |
| CN2729593Y (en) | Multi-pipe fluidic oscillating refrigerating machine | |
| CN101890253B (en) | Extraction multi-chamber mixer used in antibiotic production | |
| CN104315740B (en) | The multistage oscillating jet air wave refrigerating device of external excitation | |
| CN103861748B (en) | Recommend external excitation formula fluidic oscillation generator | |
| CN114382610A (en) | Adjustable jet pipe of detonation ramjet based on spiral oblique shock wave motion law | |
| CN103016425B (en) | Three-level multi-spray-pipe central ejector | |
| CN2896141Y (en) | Single-tube gas-wave refrigerator | |
| CN206803547U (en) | A kind of dual openings section-variable gas ripple refrigeration machine | |
| CN212006287U (en) | Self-excited micro-jet control multi-tube oscillator | |
| CN111306828B (en) | Self-exciting micro-jet controlled multitube oscillator | |
| CN202468498U (en) | Axial-flow type jet flow air wave supercharger | |
| CN113019789B (en) | Wall-separating type feedback jet oscillator | |
| CN108547746A (en) | Portable small-size solar energy utilizes device | |
| CN100575815C (en) | The damping formula air wave refrigerating device that liquidates | |
| CN204128239U (en) | The multistage oscillating jet air wave refrigerating device of external excitation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |