CN1282825C - Mixed line wave thermal sound engine with bouble-end drive - Google Patents
Mixed line wave thermal sound engine with bouble-end drive Download PDFInfo
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- CN1282825C CN1282825C CN 200410016691 CN200410016691A CN1282825C CN 1282825 C CN1282825 C CN 1282825C CN 200410016691 CN200410016691 CN 200410016691 CN 200410016691 A CN200410016691 A CN 200410016691A CN 1282825 C CN1282825 C CN 1282825C
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Abstract
The present invention discloses a mixed traveling wave thermoacoustics engine with both driven ends. The present invention comprises thermoacoustics generators with traveling wave loop circuit structures, and a straight resonance circuit, wherein the thermoacoustics generators are composed of a feedback pipeline, an acoustic capacitance pipeline, a jet pump, a main cooler, a thermoacoustics heat regenerator, a heater, a thermal buffer tube and an auxiliary cooler which are orderly connected; the other end of the straight resonance circuit is connected with the same or similar thermoacoustics generator with the traveling wave loop circuit structures. The present invention is provided to greatly improve the efficiency of the mixed traveling wave thermoacoustics engine and increase the acoustic power output of the thermal and acoustic engine to satisfy the requirement of engineering application. When the present invention works, heating power is simultaneously or singly input into the two loop circuit thermal and acoustic generators. Thereby, much acoustic power can be conveyed into the straight resonance circuit. In the process of working, the whole system integrates the advantages of a pure standing wave engine and a pure traveling wave engine, and the operating mode of traveling waves is realized. Simultaneously, compared with a single end type mixed traveling wave thermal and acoustic engine, the present invention has high thermoacoustics conversion efficiency.
Description
Technical field
The present invention relates to the mixing type traveling wave thermoacoustic engine that a kind of both-end drives, it can realize the high-efficient operation of whole heat engine system.
Background technique
Thermoacoustic engine is to utilize thermoacoustic effect, realizes the sound generator of heat energy to acoustic energy conversion and the output of realization sound merit.According to the sound field characteristic difference, thermoacoustic engine mainly is divided into three kinds of patterns of the capable ripple hybrid type of stationary mode, travelling-wave type and standing wave.Because standing-wave sound field medium velocity ripple and pressure wave phase difference are 90 °, do not have the transmission of merit in the stationary field in theory; On the other hand, in standing wave thermoacoustic engine plate is folded gas with solid between heat exchange relatively poor, what gas carried out is that irreversible thermodynamics circulate, so thermoacoustic engine efficient is low.The utilization of travelling-wave type thermoacoustic engine be row wave sound field, the fluctuation of sound field medium velocity is identical with the pressure surge phase place, and the hydraulic radius of gas channel is much smaller than the gas heat penetration in the motor regenerator, gas carries out in regenerator warm transmission such as is, therefore traveling wave thermoacoustic engine can reach the thermodynamic efficiency higher than standing wave thermoacoustic engine in theory, and bright application prospect is arranged.Traveling wave thermoacoustic engine has experienced following several stages.
1. pure loop traveling wave thermoacoustic engine
Ceperley in 1979 have at first proposed the notion of travelling-wave type thermoacoustic engine, and he finds that the row ripple has experienced with the desirable Stirling similar thermodynamic process that circulates by regenerator the time.The Yazaki of Japan proves and can realize in the ripple loop of being expert at keeping vibration certainly, but the traveling wave thermoacoustic engine efficient of Yazaki is very low.The reason that pure loop thermoacoustic engine can not efficiently move has: 1) always there is thermal hysteresis when mutually heat is transmitted between the gas medium inevitably in solid dielectric in the regenerator; 2) going the wave sound field has the low acoustic impedance characteristic, and this can cause big viscosity loss, particularly at the regenerator place; 3) there are various forms of loop direct currents.
2. mixing type traveling wave thermoacoustic engine
The standing wave forthright is introduced in appropriate location at loop, constitute mixing type traveling wave thermoacoustic engine, the thermal hysteresis that can utilize on the one hand solid dielectric in the regenerator to exist when heat is transmitted mutually between the gas medium realizes the conversion of standing wave heat sound, thus can improve on the other hand capable wave sound field particularly the acoustic impedance at regenerator place reduce viscous loss.U.S. Los Alamos National Laboratory has made a travelling-wave type thermoacoustic engine, draw a standing wave forthright by the ripple loop of being expert at, successfully in sound field, introduce the standing wave composition, and in experiment, obtained 42% relative Carnot efficiency and 30% thermodynamic efficiency.
3. tandem type traveling wave thermoacoustic engine
Pure standing wave forthright efficient is lower, but simple in structure, and there is stress in loop structure and need to increase the lucky resistance structure of stepping on direct current of inhibition, and Swift has proposed this notion at first, realizes on forthright that directly the power amplifier of row ripple is big.The tandem type traveling wave thermoacoustic engine, it has eliminated the stress problem on the loop, makes simple in structure again.But owing to will on forthright, realize accurate traveling-wave phase,, there is serious drag losses, realizes really that efficient operation also will do a lot of work so will introduce some phonoreception elements.
At present, studying many in the world is mixing type traveling wave thermoacoustic engine, and its structure as shown in Figure 1.We are exactly the mixing type traveling wave thermoacoustic engine that has proposed both-end driving pattern on the basis of mixing type traveling wave thermoacoustic engine, and purpose is power and the efficient that increases substantially thermoacoustic engine.As shown in Figure 1, mixing type traveling wave thermoacoustic engine has following constituent element usually:
One, goes the ripple loop
1. primary cooler, primary cooler is positioned at the top of regenerator 2, and its effect is to take away heat, cooled gas working medium at the regenerator indoor temperature end, to set up the temperature gradient on the thermal acoustic regenerator;
2. thermal acoustic regenerator is positioned at primary cooler 1 below, and thermal acoustic regenerator is the key member that produces and strengthen thermoacoustic effect, and the thermoacoustic effect of Fa Shenging produces merit or strengthens herein;
3. heater, the effect of heater are that the other end at the relative cooler of regenerator provides a high temperature heat source, form a temperature gradient with the ambient temperature at cooler place on regenerator.This temperature gradient is the power of thermoacoustic engine work;
4. thermal buffer channel, thermal buffer channel are between heater 3 and supplementary cooler 5, and effect is to realize that the heater and the heat of supplementary cooler isolates, and to reduce the leakage heat of hot end heat exchanger to supplementary cooler, makes the sound merit from the outwards transmission of engine high-temperature zone simultaneously.In order to reduce axial thermal conductivity, tube wall should be thin as far as possible under the situation of requirement of strength satisfying for thermal buffer channel;
5. supplementary cooler and fluid director, the effect of supplementary cooler are the gas temperatures that reduces transmission sound merit, are beneficial to that merit is drawn and provide power for hot sound refrigerating machine.Direct current in loop flows, and (Gedeon flows, promptly pass through the time equal mass flow along loop such as regenerator, thermal buffer channel, feedback pipe) and thermal buffer channel in direct current flow when all being suppressed fully, the load of supplementary cooler only is that diameter is big so supplementary cooler can adopt along the leakage of thermal buffer channel tube wall heat with from the thermal radiation of hot end heat exchanger, length is lacked the Stainless Steel Tube of (being that heat exchange area is less);
Fluid director is positioned at thermal buffer channel below, and effect is to make to enter the thermal buffer channel bottom and the interior air-flow of thermal buffer channel evenly distributes, prevent owing to the shape of supplementary cooler or with the jet that forms that separates of the tie point place air-flow of resonatron.Jet can cause the direct current of gas in the thermal buffer channel to flow, and causes the waste of a large amount of heats of heater.
6. feedback pipe, the effect of feedback pipe are for the row wave component provides path, play the effect of phonoreception parts simultaneously, make the cooler place produce traveling-wave phase;
7. acoustic capacitance channel, acoustic capacitance is a cavity that volume is bigger across loop left and right sides branch road.It is acoustic capacitance parts in essence, realizes traveling-wave phase in cooler end together with the feedback forthright;
8. jet pump, spray body pump is between acoustic capacitance 7 and primary cooler 1, its effect is to utilize the runner asymmetrical effect to produce a pressure difference at two ends, forms a counteracting as far as possible with it of flowing also against loop second order mass flow, thereby suppresses loop Gedeon direct current.
Two, standing wave resonance forthright
9. resonance straight-path, the effect of resonance straight-path are the standing wave pipelines of coupling on the ripple loop of being expert at, and in standing wave composition drawing-in system, make this system have the advantage of standing wave and traveling wave thermoacoustic engine concurrently, thereby have improved the thermodynamic efficiency of thermoacoustic engine; On the other hand, resonance straight-path is drawn most of sound merit and is formed the standing wave phase place at forthright from loop, because standing wave system can realize bigger acoustic impedance, so resonance straight-path provides the optimum position that connects load;
10. muffling part.
Summary of the invention
The purpose of this invention is to provide the mixing type traveling wave thermoacoustic engine that a kind of both-end drives.
It comprises successively hot acoustic generator of capable ripple loop structure and the resonance straight-path that the feedback pipe, acoustic capacitance channel, jet pump, primary cooler, thermal acoustic regenerator, heater, thermal buffer channel, the supplementary cooler that connect are formed, and connects the hot acoustic generator of same or similar capable ripple loop structure at the resonance straight-path the other end.
The present invention is the sound merit output that increases substantially the efficient of mixing type traveling wave thermoacoustic engine and increase thermoacoustic engine, to satisfy the engineering application requirements, proposes the notion that both-end drives mixing type traveling wave thermoacoustic engine.Both-end drives the hybrid type thermoacoustic engine has replaced the resonance straight-path end of mixing type traveling wave thermoacoustic engine with second capable ripple loop muffling part, it has eliminated single-ended traveling wave thermoacoustic engine indispensable 1/2 or 1/4 wavelength closed end, two hot acoustic generators of loop are arranged at two ends at resonatron, link by the standing wave resonance forthright of interface Taper Pipe with the centre respectively.Loop is the core component of generation and amplification sound merit, and operation is the row wave component in it.During work in two hot acoustic generators of loop simultaneously or import heating power separately, thereby can there be more sound merit to be delivered in the resonance straight-path, whole system has had the advantage of pure standing wave motor and pure traveling wave engine at work concurrently, realize the method for operation of capable ripple, had higher heat sound transformation efficiency than single-ended pattern again simultaneously.
Description of drawings
Fig. 1 is the mixing type traveling wave thermoacoustic engine structural representation;
Fig. 2 is the mixing type traveling wave thermoacoustic engine structural representation that uses by-pass structure between regenerator and feedback pipe;
Fig. 3 is the hybrid type thermoacoustic engine structural representation that adopts symmetrical feedback arrangement;
Fig. 4 is that both-end drives the mixing type traveling wave thermoacoustic engine schematic representation.
Embodiment
As shown in the figure, the mixing type traveling wave thermoacoustic engine that both-end drives comprises hot acoustic generator of capable ripple loop structure and the resonance straight-path 9 that feedback pipe 6, acoustic capacitance channel 7, jet pump 8, primary cooler 1, thermal acoustic regenerator 2, heater 3, thermal buffer channel 4, the supplementary cooler 5 of connection are successively formed, and connects the hot acoustic generator of same or similar capable ripple loop structure at resonance straight-path 9 the other ends.
Establish by-pass structure between the feedback pipe 6 of the hot acoustic generator of capable ripple loop structure that said resonance straight-path 9 one or both ends connect and the thermal acoustic regenerator 2.The acoustic capacitance channel 7 of the hot acoustic generator of capable ripple loop structure that connects in said resonance straight-path 9 one or both ends is connected with second feedback pipe with the inlet of resonance straight-path 9.Be expert at and establish by-pass structure between feedback pipe 6 between the acoustic capacitance channel 7 of the hot acoustic generator of ripple loop structure and resonance straight-path 9 inlets or second feedback pipe or feedback pipe 6 and second feedback pipe and the thermal acoustic regenerator 2.By-pass structure is a bypass tube, is provided with the valve of adjusting sound merit flow size on bypass tube.
Two row hot acoustic generators of ripple loop structure and resonance straight-path assembly are assembled, and the road links together by flange, has just realized the assembling of whole system.After finishing the assembling of system, charge into the working gas of certain pressure in system, the water inlet of major and minor cooler and outlet conduit are connected also water flowing, heater begins heating, and system enters working state so, can obtain merit output at the suitable position of system.
Claims (5)
1. a both-end drives mixing type traveling wave thermoacoustic engine, it comprises successively hot acoustic generator of capable ripple loop structure and the resonance straight-path (9) that the feedback pipe (6), acoustic capacitance channel (7), jet pump (8), primary cooler (1), thermal acoustic regenerator (2), heater (3), thermal buffer channel (4), the supplementary cooler (5) that connect are formed, and it is characterized in that: at the identical hot acoustic generator of capable ripple loop structure of resonance straight-path (9) the other end connection.
2. a kind of both-end according to claim 1 drives mixing type traveling wave thermoacoustic engine, it is characterized in that: establish by-pass structure between the feedback pipe (6) of the hot acoustic generator of capable ripple loop structure that said resonance straight-path (9) one or both ends connect and the thermal acoustic regenerator (2).
3. a kind of both-end according to claim 1 drives mixing type traveling wave thermoacoustic engine, it is characterized in that: the acoustic capacitance channel (7) of the hot acoustic generator of capable ripple loop structure that connects in said resonance straight-path (9) one or both ends is connected with second feedback pipe with the inlet of resonance straight-path (9).
4. a kind of both-end according to claim 3 drives mixing type traveling wave thermoacoustic engine, it is characterized in that: establish by-pass structure between said second feedback pipe and thermal acoustic regenerator (2).
5. drive mixing type traveling wave thermoacoustic engine according to claim 2 or 4 described a kind of both-ends, it is characterized in that: said by-pass structure is a bypass tube, is provided with the valve of adjusting sound merit flow size on bypass tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410016691 CN1282825C (en) | 2004-02-26 | 2004-02-26 | Mixed line wave thermal sound engine with bouble-end drive |
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| CN 200410016691 CN1282825C (en) | 2004-02-26 | 2004-02-26 | Mixed line wave thermal sound engine with bouble-end drive |
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| CN1560471A CN1560471A (en) | 2005-01-05 |
| CN1282825C true CN1282825C (en) | 2006-11-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100458148C (en) * | 2004-12-10 | 2009-02-04 | 中国科学院理化技术研究所 | Heat sound engine with gradually enlarged section resonant cavity |
| CN100545449C (en) * | 2007-04-25 | 2009-09-30 | 中国科学院理化技术研究所 | Utilize the thermo-acoustic engine system of temperature-variable heat source |
| CN101852513A (en) * | 2010-05-17 | 2010-10-06 | 苏州赛尔科凌空调有限公司 | Thermoacoustic refrigeration device of automobile |
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