CN105758051A - Isolated gas wave tube with middle wave blocking cavity - Google Patents
Isolated gas wave tube with middle wave blocking cavity Download PDFInfo
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- CN105758051A CN105758051A CN201610150672.XA CN201610150672A CN105758051A CN 105758051 A CN105758051 A CN 105758051A CN 201610150672 A CN201610150672 A CN 201610150672A CN 105758051 A CN105758051 A CN 105758051A
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- wave
- chamber
- arrestment
- pipe
- flow area
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- 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
Abstract
The invention provides an isolated gas wave tube with a middle wave blocking cavity, and belongs to the technical field of gas expansion refrigeration and unsteady flowing gas wave transmission and energy exchange. The wave blocking cavity with a limited volume is formed in the middle section of each gas wave tube. Two ends of the wave blocking cavity are respectively connected and communicated with a gas wave tube front section and a gas wave tube rear section, and a flow passage which is expanded firstly and then is shrunk is formed inside the gas wave tube. Meanwhile, an inner diameter through-flow sectional area of the gas wave tube front section is smaller than a tube through-flow sectional area of the rear section. Therefore, a reflected shock wave in the tube is buffered and subjected to energy dissipation in the wave blocking cavity, and the residual reflected shock wave returns to the gas wave tube rear section to be subjected to reinforced dissipation, so that the reflected shock wave is returned to a gas wave tube orifice less, direct heating on refrigerated gas is reduced, the temperature of the tube wall of the gas wave tube front section is reduced, and heat transfer on the refrigerated gas in the tube is reduced. According to the gas wave tube adopting the new principle structure, refrigerating efficiency can be improved by over 5% averagely, a wave trough efficiency value when jet flow efficiency is mismatched with the tube length is increased, difficulty in design matching is reduced, and performance under variable conditions of gas wave refrigeration is improved.
Description
Technical field
The isolated wave pipe in wave arrestment chamber in the middle part of the present invention, wave pipe also referred to as adopter, oscillating tube or dissipate pipe, be mainly used in air wave refrigerating device, belong to gas expansion refrigeration and unsteady flow take offence bulk wave transmission positive energy exchange technical field.
Background technology
Air wave refrigerating device on heat separator basis reformed AHP out, there is the gas expansion refrigerating machine of particular advantages, be divided into rotary and state type two kinds.The significant difference of air wave refrigerating device and heat separator is, the former is at the end end of its each wave pipe (being also called adopter, oscillating tube and the pipe that dissipates), all the continued access cavity of one finite volume, is called cylindrical tank (see Chinese patent ZL89213744.4).
From wave tube inlet injected pulse jet, in compressed pipe, remained gas produces Shock-Motion dissipation energy and decays.After the Shock-Motion of decay bumps against wave pipe endcapped interface, by backtracking, the pulsing jet gas of heating wave pipe leading portion and the expansion work refrigeration of mouth of pipe place, and raise tube inlet pressure and reduce the actual expansion ratio of jet, make refrigerating efficiency reduce.
The effect of aforementioned cylindrical tank, it is simply that absorb and stop the return of reflected shock wave the disappearance that dissipates in cylindrical tank.Thus, cylindrical tank can improve the refrigerating efficiency of wave pipe.
But, analyze and actual measurement all shows, the cylindrical tank of pipe end finite volume, though shock wave spread reflection and dissipation can be made, but because the heat radiation of its cavity wall is limited, abatement shock strength effect is also limited, and SHOCK ENERGY is not fully decayed, returning wave pipe after intracavity multiple reflections and return, above-mentioned adverse effect still exists.
If when upper once pulsing jet injected gas wave duct mouth, reflected shock wave returns near the arrival mouth of pipe just, will continue to propagate and little effect refrigeration gas to gas source upstream, and may occur in which the peak value of refrigerating efficiency.Otherwise, will seriously heat the refrigerant gas outside the mouth of pipe and effuser, efficiency trough occurs, peak, paddy efficiency difference may be up to 20～30%.
The characteristic of gas wave refrigeration engine efficiency carried as side-arm stream frequency change, makes the difficulty that design is mated increase on the one hand；On the other hand, also lead to its off design performance and be deteriorated, because the change of gas physical property, traffic load, pressure and temperature parameter, all can cause the change of shock wave transmission speed, and in advance or delay when jet injects, arrive the mouth of pipe.
Even if in the efficiency high point of coupling, reflected shock wave also can raise mouth of pipe place pressure, makes the actual expansion ratio of jet at that time reduce, and enthalpy drop reduces, the raising of restriction refrigerating efficiency.
Eliminate the basic act of reflected shock wave, be the energy fully dissipating shock wave.The outside housing that surrounds of adopter described in Chinese patent CN200910107475.X forms cooling chamber, to accelerate the energy of shock wave in absorption tube, makes reflected shock wave intensity reduce.But which increase the structural complexity of gas wave machine and use operating condition.And reflected shock wave remains to return wave tube inlet unblockedly, it does not have be subject to resistance slow.
Summary of the invention
The present invention provides wave arrestment chamber in the middle part of one isolated wave pipe, also referred to as the isolated adopter in wave arrestment chamber, middle part, oscillating tube or the pipe that dissipates, is a kind of brand-new wave tubular construction.It is according to shock wave reflection and crossing transmission theory, simulate and actual measurement by managing the hydrodynamics method of interior shock wave moving law, take to intercept correct measure and the method that reflected shock wave arrives the mouth of pipe and do not affect shooting flow expanding acting, carry out intercepting, intercept and reflecting again in wave pipe backhaul by reflected shock wave, it is made repeatedly to come and go dissipation energy at the back segment of wave pipe, strengthen the energy dissipation of the lighter wave pipe back segment of original dissipation load, reflected shock wave is made to forward to the porch of wave pipe as few as possible, it is to avoid to heat refrigeration gas.
Technical scheme:
The isolated wave pipe in wave arrestment chamber, middle part, adopter, oscillating tube or the pipe that dissipates, inhale the gentle wave duct in ripple chamber 5 support 6 including wave tube inlet 1, wave pipe leading portion 2, wave arrestment chamber, middle part 3, wave pipe back segment 4, end；The one end open in wave arrestment chamber 3 in the middle part of wave pipe leading portion 2 continued access, the front end of the other end opening continued access wave pipe back segment 4 in wave arrestment chamber, middle part 3, first expand, being internally formed one, the runner shunk again, the tail end of wave pipe back segment 4 connects end and inhales unique opening in ripple chamber 5；
Described wave arrestment chamber, middle part 3 is the container tank of the finite volume arranged in isolated wave pipe stage casing, wave arrestment chamber, middle part；Or it is separated into, by dividing plate, the chamber that several centers are ganged up in wave arrestment chamber, middle part 3, increase the damping to reflected shock wave；
The internal diameter of wave pipe leading portion 2 or cross-sectional flow area are less than the internal diameter of wave pipe back segment 4 or cross-sectional flow area, making reflected shock wave be not easily accessed wave pipe leading portion 2, wave pipe leading portion 2 front end nozzle sizes matches with the flow area of pulsing jet and the outlet size of jet nozzle.
Described wave arrestment chamber, middle part 3 or end are inhaled the space in ripple chamber 5 and are divided within 10 by the lateral partitions of middle part perforate to be axially arranged in series the space of connection.
The interior cross-sectional flow area of described wave pipe leading portion 2, according to its gas flow, is of a size of 2～10000 square millimeters.
The interior cross-sectional flow area of described wave pipe back segment 4, mates according to the difference of its working condition, and cross-sectional flow area is 1～15 times of wave pipe leading portion 2 cross-sectional flow area.
Cross-sectional flow area in described wave arrestment chamber, middle part 3, difference according to its working condition is mated, cross-sectional flow area is 1.1～300 times of wave pipe leading portion 2 cross-sectional flow area, and the length in wave arrestment chamber, middle part 3 is in the middle part of this 0.2～10 times of wave arrestment chamber 3 projection width or internal diameter.
Described end is inhaled the hollow cross-section in ripple chamber 5 and is amassed, difference according to its working condition is mated, hollow cross-section amasss 1.1～300 times into wave pipe back segment 4 cross-sectional flow area, and end inhales 0.2～10 times that length is this end Xi Boqiang 5 projection width or internal diameter of ripple chamber 5.
Described wave pipe leading portion 2, wave arrestment chamber, middle part 3, wave pipe back segment 4 and end inhale the pipe inner flow passage that through-flow runner is pipe, elliptical tube, square tube or rectangular tube in ripple chamber 5, or go out groove and cavity volume in physical member Surface Machining, the more embedded conduit tightly being sealed by other physical member surface cover and being formed or tract.
The invention has the beneficial effects as follows:
1., according to shock wave reflection and crossing principle, reflected shock wave will be cushioned and dissipated certain energy in wave arrestment chamber, and remainder will reflect back into wave pipe back segment, and only small part can arrive at the wave mouth of pipe, thus reducing the adverse effect to refrigeration gas.
2. residual reflectivity shock wave can transmit by multiple reflections between the suction ripple chamber of wave arrestment chamber and pipe end, can meet next time a shock wave and the reflected shock wave of (or lower n times) fluidic vectoring thrust, produce repeatedly reverse crossing situation in way.When crossing, shock strength superposition, it is more conducive to heat transfer dissipation energy, namely wave arrestment chamber can make energy dissipation load move afterwards in a large number, reduces the tube wall temperature of wave pipe leading portion, reduces the heat transfer to the gas that freezed in pipe.
3. the cross-sectional flow area of wave pipe back segment is more than leading portion, and leading portion nozzle sizes can be made to be more prone to jet nozzle mate completely, and can solve that former follow-up tube section is long-pending follows the mouth of pipe, causes wave tube wall area little and the not enough contradiction of dissipation energy.More importantly, the reduction of sectional area in wave pipe leading portion end, it is more conducive to intercept reflected shock wave and enters wave pipe leading portion from wave arrestment chamber.
4. above effect all improves the refrigerating efficiency of wave pipe, on average can improve more than 5%.And more it is beneficial that, it can be obviously improved trough efficiency value when jet frequency does not mate (reflected shock wave arrives in advance or do not arrive the wave mouth of pipe when jet) with pipe range, reduce the difficulty of design coupling on the one hand, the variable working condition conformability of gas wave refrigeration can be significantly improved on the other hand.
Accompanying drawing explanation
Accompanying drawing is the structure diagram of the isolated wave pipe in wave arrestment chamber in the middle part of the present invention.
In figure: 1 wave tube inlet；2 wave pipe leading portions；Wave arrestment chamber in the middle part of in the of 3；4 wave pipe back segments；
5 ends inhale ripple chamber；6 wave pipes support；7 pulsing jets.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
In the middle part of the present invention, a kind of typical embodiment of the isolated wave in wave arrestment chamber pipe describes as follows, but is not limited solely to this kind of embodiment:
The isolated wave pipe in wave arrestment chamber in the middle part of the present invention, or claim middle part wave arrestment chamber isolated adopter, oscillating tube or the pipe that dissipates, including wave tube inlet 1, wave pipe leading portion 2, wave arrestment chamber, middle part 3, wave pipe back segment 4, end inhale ripple chamber 5, and wave pipe support the parts such as 6；The one end open in wave arrestment chamber 3 in the middle part of wave pipe leading portion 2 continued access, the other end opening continued access wave pipe back segment 4 in wave arrestment chamber, middle part 3, the tail end of wave pipe back segment 4 connects end and inhales unique opening in ripple chamber 5.
The each several part of the isolated wave pipe in wave arrestment chamber in the middle part of the present invention, including wave pipe leading portion 2, wave arrestment chamber 3, middle part, wave pipe back segment 4, end inhales ripple chamber 5, the through-flow runner of its each hollow, is usually the pipe inner flow passage of common pipe, elliptical tube, square tube and rectangular tube, or go out groove and cavity volume in certain physical member Surface Machining, the more embedded conduit tightly being sealed by other physical member surface cover and being formed and cavity road.
The isolated wave pipe in wave arrestment chamber in the middle part of the present invention, the space in wave arrestment chamber 3 in the middle part of it, for whole space or the space being divided within 10 connection that is axially arranged in series by the lateral partitions of perforate in the middle part of several pieces.
Middle part wave arrestment chamber isolated wave pipe, its end inhales the space in ripple chamber 5, for whole space or the space being divided within 10 by the lateral partitions of perforate in the middle part of several pieces to be axially arranged in series connection.
The isolated wave pipe in wave arrestment chamber, middle part, the interior cross-sectional flow area of its wave pipe leading portion 2, the size according to its gas flow, size range is 2～10000 square millimeters.
The isolated wave pipe in wave arrestment chamber, middle part, the interior cross-sectional flow area of its wave pipe back segment 4, mate according to the difference of its working condition, it ranges for 1～15 times of wave pipe leading portion 2 cross-sectional flow area.
The isolated wave pipe in wave arrestment chamber, middle part, in the middle part of it, the interior cross-sectional flow area in wave arrestment chamber 3, mates according to the difference of its working condition, and it ranges for 1.1～300 times of wave pipe leading portion 2 cross-sectional flow area；The length in wave arrestment chamber 3, middle part, for 0.2～10 times of this chamber projection width or internal diameter.
The isolated wave pipe in wave arrestment chamber, middle part, its end is inhaled the hollow cross-section in ripple chamber 5 and is amassed, and mates according to the difference of its working condition, and it ranges for 1.1～300 times of wave pipe back segment 4 cross-sectional flow area；End inhales the length in ripple chamber 5, for 0.2～10 times of this chamber projection width or internal diameter.
In the middle part of the present invention, the refrigeration principle of the isolated wave pipe in wave arrestment chamber is:
Mouth of pipe pulsing jet 7 is the pulsing jet that dutycycle is sufficiently small, swivel nozzle jet distributor or air-flow clap oscillator produce.The unexpected injected gas wave duct entrance 1 of pulsing jet, the entrapped air volume in output expansion work compressed gas wave duct, remained gas produces compressional wave until shock wave, quickly jet energy is reached depth or even the back segment of wave pipe；Shock wave is inswept makes remained gas heat up, and by tube wall, energy is dispersed into the external world, depleted of energy and do not return again to Gas Jet, jet gas produces big enthalpy drop because of expansion work, and temperature reduces and freezes.
The shock wave that ripple chamber 5 is reflected back is inhaled, from end, in 3, wave arrestment chamber, middle part, intercept and dissipate and be again reflected back wave pipe back segment dissipatinga attenuation totally, and return to wave tube inlet 1 as few as possible, avoid the reflected shock wave heating to refrigeration gas, improve refrigerating efficiency, the low valley of efficiency when particularly jet frequency is not mated with wave pipe range, it will be increased significantly.
In the middle part of the present invention, the operational factor of the isolated wave in wave arrestment chamber pipe is as follows:
Pulsing jet frequency: 5～500Hz；
Pulsing jet dutycycle: 1/1～1/200；
The pressure limit of pulsing jet: 0.01～40MPa.
Claims (10)
1. the isolated wave pipe in wave arrestment chamber, middle part, it is characterized in that, in the middle part of this, wave arrestment chamber isolated wave pipe includes wave tube inlet (1), wave pipe leading portion (2), wave arrestment chamber, middle part (3), wave pipe back segment (4), gentle wave duct support (6) of end suction ripple chamber (5)；The one end open in wave arrestment chamber (3) in the middle part of wave pipe leading portion (2) continued access, the front end of other end opening continued access wave pipe back segment (4) at wave arrestment chamber, middle part (3), first expanding, being internally formed one, the runner shunk again, the tail end of wave pipe back segment (4) connects end and inhales unique opening in ripple chamber (5)；
Described wave arrestment chamber, middle part (3) is the container tank of the finite volume arranged in isolated wave pipe stage casing, wave arrestment chamber, middle part；Or it is separated into, by dividing plate, the chamber that several centers are ganged up in wave arrestment chamber, middle part (3), increase the damping to reflected shock wave；
The internal diameter of wave pipe leading portion (2) or cross-sectional flow area are less than the internal diameter of wave pipe back segment (4) or cross-sectional flow area, making reflected shock wave be not easily accessed wave pipe leading portion (2), wave pipe leading portion (2) front end nozzle sizes matches with the flow area of pulsing jet and the outlet size of jet nozzle.
2. the isolated wave pipe in wave arrestment chamber, middle part according to claim 1, it is characterized in that, described wave arrestment chamber, middle part (3) or end are inhaled the space in ripple chamber (5) and are divided within 10 by the lateral partitions of middle part perforate to be axially arranged in series the space of connection.
3. the isolated wave pipe in wave arrestment chamber, middle part according to claim 1 and 2, it is characterised in that the interior cross-sectional flow area of described wave pipe leading portion (2), according to its gas flow, is of a size of 2～10000 square millimeters.
4. the isolated wave pipe in wave arrestment chamber, middle part according to claim 1 and 2, it is characterized in that, the interior cross-sectional flow area of described wave pipe back segment (4), difference according to its working condition is mated, and cross-sectional flow area is 1～15 times of wave pipe leading portion (2) cross-sectional flow area.
5. the isolated wave pipe in wave arrestment chamber, middle part according to claim 3, it is characterized in that, the interior cross-sectional flow area of described wave pipe back segment (4), difference according to its working condition is mated, and cross-sectional flow area is 1～15 times of wave pipe leading portion (2) cross-sectional flow area.
6. the isolated wave pipe in wave arrestment chamber, middle part according to claim 1 or 2 or 5, it is characterized in that, described wave arrestment chamber, middle part (3) interior cross-sectional flow area, difference according to its working condition is mated, cross-sectional flow area is 1.1～300 times of wave pipe leading portion (2) cross-sectional flow area, and the length in wave arrestment chamber, middle part (3) is in the middle part of this 0.2～10 times of wave arrestment chamber (3) projection width or internal diameter.
7. the isolated wave pipe in wave arrestment chamber, middle part according to claim 3, it is characterized in that, described wave arrestment chamber, middle part (3) interior cross-sectional flow area, difference according to its working condition is mated, cross-sectional flow area is 1.1～300 times of wave pipe leading portion (2) cross-sectional flow area, and the length in wave arrestment chamber, middle part (3) is in the middle part of this 0.2～10 times of wave arrestment chamber (3) projection width or internal diameter.
8. the isolated wave pipe in wave arrestment chamber, middle part according to claim 4, it is characterized in that, described wave arrestment chamber, middle part (3) interior cross-sectional flow area, difference according to its working condition is mated, cross-sectional flow area is 1.1～300 times of wave pipe leading portion (2) cross-sectional flow area, and the length in wave arrestment chamber, middle part (3) is in the middle part of this 0.2～10 times of wave arrestment chamber (3) projection width or internal diameter.
9. the isolated wave pipe in wave arrestment chamber, middle part according to claim 1,2,5,7 or 8, it is characterized in that, described end is inhaled the hollow cross-section in ripple chamber (5) and is amassed, difference according to its working condition is mated, hollow cross-section amasss 1.1～300 times into wave pipe back segment (4) cross-sectional flow area, and end is inhaled the length in ripple chamber (5) and inhaled 0.2～10 times of ripple chamber (5) projection width or internal diameter for this end.
10. the isolated wave pipe in wave arrestment chamber, middle part according to claim 1,2,5,7 or 8, it is characterized in that, described wave pipe leading portion (2), wave arrestment chamber, middle part (3), wave pipe back segment (4) and end inhale the pipe inner flow passage that through-flow runner is pipe, elliptical tube, square tube or rectangular tube in ripple chamber (5), or go out groove and cavity volume in physical member Surface Machining, the more embedded conduit tightly being sealed by other physical member surface cover and being formed or tract.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150672.XA CN105758051B (en) | 2016-03-16 | 2016-03-16 | The isolated wave pipe of middle part wave arrestment chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150672.XA CN105758051B (en) | 2016-03-16 | 2016-03-16 | The isolated wave pipe of middle part wave arrestment chamber |
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| Publication Number | Publication Date |
|---|---|
| CN105758051A true CN105758051A (en) | 2016-07-13 |
| CN105758051B CN105758051B (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610150672.XA Expired - Fee Related CN105758051B (en) | 2016-03-16 | 2016-03-16 | The isolated wave pipe of middle part wave arrestment chamber |
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| CN (1) | CN105758051B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3653225A (en) * | 1968-08-05 | 1972-04-04 | Bertin & Cie | Gas-cooling system and its uses |
| US6089026A (en) * | 1999-03-26 | 2000-07-18 | Hu; Zhimin | Gaseous wave refrigeration device with flow regulator |
| CN1267685C (en) * | 2004-03-12 | 2006-08-02 | 大连理工大学 | Multi-tube jetting oscillating refrigerator and its refrigeration method |
| CN1818510A (en) * | 2006-02-25 | 2006-08-16 | 大连理工大学 | Air-wave refrigerator with single pipe and refrigerating method thereof |
| CN205448390U (en) * | 2016-03-16 | 2016-08-10 | 大连理工大学 | Middle part hinders isolated wave pipe in ripples chamber |
-
2016
- 2016-03-16 CN CN201610150672.XA patent/CN105758051B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3653225A (en) * | 1968-08-05 | 1972-04-04 | Bertin & Cie | Gas-cooling system and its uses |
| US6089026A (en) * | 1999-03-26 | 2000-07-18 | Hu; Zhimin | Gaseous wave refrigeration device with flow regulator |
| CN1267685C (en) * | 2004-03-12 | 2006-08-02 | 大连理工大学 | Multi-tube jetting oscillating refrigerator and its refrigeration method |
| CN1818510A (en) * | 2006-02-25 | 2006-08-16 | 大连理工大学 | Air-wave refrigerator with single pipe and refrigerating method thereof |
| CN205448390U (en) * | 2016-03-16 | 2016-08-10 | 大连理工大学 | Middle part hinders isolated wave pipe in ripples chamber |
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| CN105758051B (en) | 2018-09-04 |
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