CN105182232A - Current-vibration body-generator power coupling experiment simulation apparatus - Google Patents
Current-vibration body-generator power coupling experiment simulation apparatus Download PDFInfo
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- CN105182232A CN105182232A CN201510496948.5A CN201510496948A CN105182232A CN 105182232 A CN105182232 A CN 105182232A CN 201510496948 A CN201510496948 A CN 201510496948A CN 105182232 A CN105182232 A CN 105182232A
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Abstract
The invention discloses a current-vibration body-generator power coupling experiment simulation apparatus. The apparatus comprises a cylinder, two multi-component force measuring balances are embedded into grooves and are fixed at the two ends of the cylinder, the multi-component force measuring balances are fixedly connected with end plates, the two end plates are connected, and the upper ends of the end plates are provided with horizontal plates and linear bearings; the lower portions of the horizontal plates are provided with compression springs, and the lower ends of the compression springs are connected with horizontal support structures through clamps; the linear bearings are sleeved on linear guide rails; and a support frame is welded to the horizontal support structures, a stay rope displacement sensor is arranged at the upper portion of the support frame, and a stay rope of the stay rope displacement sensor is connected with the horizontal plates. Synchronous acquisition and processing are performed on output data of the multi-component force measuring balances, the stay rope displacement sensor, a PIV particle image velometer, an acoustic Doppler current meter and a generator. The apparatus provided by the invention can obtain a flow velocity, a surrounding flow field of a vibration body, flow forces applied to the vibration body, the amplitude and the frequency of the vibration body, output voltage of the generator and the conversion efficiency of the apparatus.
Description
Technical field
The invention belongs to technical field of hydroelectric generation, relate to a kind of current-vibrating mass-generator power coupling experiment analogue means.
Background technology
Since this century; the traditional energy such as coal, oil price rises steadily; international community is to the problem such as climate change, environmental protection growing interest, and the demand finding fungible energy source is extremely urgent, and countries in the world all take much count of the development and utilization of renewable and clean energy resource.Earth surface more than 70% is covered with by water body, and huge energy is contained in the slow flowing of water body.The multiple flow dynamic energy technology of domestic and international existence, due to the restriction of oneself factor, all cannot obtain energy effectively from low flow velocity current.The method of conventional hydraulic generating uses the hydraulic turbine, but need the good benefit of flow velocity competence exertion at least about 2m/s.Vortex-induced vibration stream generating device can use comparatively low flow velocity to extract high density energy, can be widely used on river, ocean, tide and other current.Vortex-induced vibration is a kind of self-excitation nonlinear resonance phenomenon, Vortex Shedding can be there is when current flow through blunt form body structure surface, when vortex shedding frequencies and natural frequency of structures comparatively close to time, vortex shedding frequencies is locked near the natural frequency of vibration of structure in a larger flow rates, and makes structure generation large-amplitude vibration.Vortex-induced vibration is the result that Vortex Shedding causes, and interactive vortex shedding produces asymmetric vibration lift, and structure is vibrated on the direction perpendicular to self axis.Find through research, the energy conversion power of vortex-induced vibration stream generating device depends on the amplitude of flow velocity, vibrating mass and frequency and lift.
Since 20th century, due to the demand in the fields such as Aerospace Engineering, oceanographic engineering and civil engineering work, lot of domestic and international scholar has carried out large quantity research to the fluid-structure interaction problem in vortex-induced vibration.The aquatic clean energy resource of vortex-induced vibration is proposed by paper " VIVACE (VortexInducedVibrationAquaticCleanEnergy): ANEWCONCEPTINGENERATIONOFCLEANANDRENEWABLEENERGYFROMFLUI DFLOW [VIVACE (the aquatic clean energy resource of vortex-induced vibration): a kind of new technology producing renewable and clean energy resource from fluid] " in the 25th offshores in 2006 and polar region engineering international conference " 25thInternationalConferenceonOffshoreandArcticEngineerin g " by the MichaelBernitsas of University of Michigan of the U.S. the earliest.Due to the dynamic coupling effect problem that the energy conversion efficiency and the reliability that are built in the vortex-induced vibration stream generating device in river or ocean are between " current-vibrating mass-generator " three, wherein relate to the multiple subjects such as fluid mechanics, structural mechanics, electricity, the report of the dynamic coupling effect experimental simulation method between not yet having at present about " current-vibrating mass-generator " three, only rely on existing experimental technique cannot the practical working situation of transcriber, also just cannot provide laboratory reference data accurately for the design of device and operation.
Summary of the invention
The object of this invention is to provide a kind of current-vibrating mass-generator power coupling experiment analogue means, the dynamic coupling effect situation between " current-vibrating mass-generator " three can be reflected exactly, solve the synchronism detection of flow field and generator output voltage amount around vibrating mass vibratory response in vortex-induced vibration stream generating device, suffered fluid force (comprising lift and drag), vibrating mass, flow field, the information such as generator output voltage and device conversion efficiency around flow velocity, the amplitude of vibrating mass and frequency, lift, drag, vibrating mass can be obtained.
The technical solution adopted in the present invention is, current-vibrating mass-generator power coupling experiment analogue means, comprise the cylinder be arranged in tank, the two ends of cylinder arrange groove, two multi-components force balances embed groove and are fixed on the two ends of cylinder, multi-components force balance and end plate affixed, two end plates are fastenedly connected by angle steel, and the upper end of end plate arranges leveling board, linear bearing; Leveling board bottom arranges Compress Spring, and Compress Spring lower end is connected with horizontal support structure by fixture, and horizontal support structure is fixed on the outer of flume wall; Linear bearing is socketed on line slideway, and line slideway is fixed on support frame; Support frame welds with horizontal support structure, and displacement sensor for pull rope is arranged on the top of support frame, and the stay cord of displacement sensor for pull rope is connected with leveling board; Tooth bar installed by wherein one piece of end plate in two end plates, and rack and pinion engages, and the rotating shaft of gear and generator is fastenedly connected, and generator is fixed on support frame; Also comprise data Collection & Processing System and computing machine, multi-components force balance, displacement sensor for pull rope, PIV particle image velocimeter, acoustic Doppler velocimetry, generator are connected with the input end of data Collection & Processing System respectively, and PIV particle image velocimeter and acoustic Doppler velocimetry are measured flow field around flow rate of water flow and cylinder.
Further, multi-components force balance by bolt and end plate affixed.
Further, horizontal support structure is fixed on the outer of flume wall by geometrical clamp.
Further, tank is made up of bottom of gullet, flume wall, and flume wall is provided with outer, and flume wall is made up of flume wall framework and glass, is provided with water circulation system, makes stream device below tank.
The invention has the beneficial effects as follows: because this experimental simulation method can obtain the dynamic data of current, vibrating mass, generator three simultaneously, dynamic coupling effect in vortex-induced vibration stream generating device between " current-vibrating mass-generator " three can be analyzed according to these data, can true reappearance device serviceability, for the design of vortex-induced vibration stream generating device and operation provide technical guarantee.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention be placed on tank.
Fig. 2 is the structural representation of header portion of the present invention.
Fig. 3 is the following vertical view of A-A section in Fig. 1.
Fig. 4 is gear-tooth bar part-structure schematic diagram of the present invention.
Fig. 5 is the structural representation of tank of the present invention.
Fig. 6 is the structured flowchart of data detection system of the present invention.
In figure, 1. flume wall, 2. outer, 3. bottom of gullet, 4. cylinder, 5. end plate, 6. leveling board, 7. Compress Spring, 8. angle steel, 9. linear bearing, 10. line slideway, 11. tooth bars, 12. gears, 13. generators, 14. support frames, 15. horizontal support structure, 16. geometrical clamps, 17. multi-components force balances, 18. displacement sensor for pull ropes, 19. stay cords, 20. bolts, 21. rotating shafts, 22. make stream device, 23. water circulation systems, 24. flume wall frameworks, 25. glass, 26.PIV particle image velocimeter, 27. acoustic Doppler velocimetries, 28. data Collection & Processing Systems, 29. computing machines.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
In the present invention, vibrating mass adopts blunt form sectional cylinder, and generator adopts small rotary formula generator.
Current-vibrating mass-generator power coupling experiment analogue means, structure as shown in figs 1 to 6, comprise the cylinder 4 be arranged in tank, the two ends of cylinder 4 arrange groove, two multi-components force balances 18 embed groove and are fixed on the two ends of cylinder 4, multi-components force balance 17 is affixed by bolt 20 and end plate 5, and the needs that cylinder 4 can experimentally be studied are changed.Two end plates 5 are fastenedly connected by angle steel 8, and the upper end of end plate 5 arranges leveling board 6, linear bearing 9.
As shown in Figure 1, Figure 3, leveling board 6 bottom arranges Compress Spring 7, and Compress Spring 7 lower end is connected with horizontal support structure 15 by fixture, and the needs that Compress Spring 7 can experimentally be studied are changed.Horizontal support structure 15 is fixed on the outer 2 of flume wall 1 by geometrical clamp 16.Linear bearing 9 is socketed on line slideway 10, and line slideway 10 is secured by bolts in support frame 14, makes cylinder 4 be only limitted to vertical up-down vibration by the effect of linear bearing 9.Support frame 14 welds with horizontal support structure 15.Displacement sensor for pull rope 18 is arranged on the top of support frame 14, and the stay cord 19 of displacement sensor for pull rope 18 is connected with leveling board 6.
As Figure 1 and Figure 4, tooth bar 11 installed by the wherein one piece of end plate 5 in two end plates 5, and tooth bar 11 engages with gear 12, and gear 12 is fastenedly connected by the rotating shaft 21 of welding with generator 13, and generator 13 is secured by bolts in support frame 14.Generator 13 can connect the pull-up resistor of different resistance values, for studying the serviceability of vortex-induced vibration stream generating device in different loads situation.
Fig. 5 is the structure of flume wall, and tank is made up of bottom of gullet 3, flume wall 1, flume wall 1 is provided with outer 2, and flume wall 1 is made up of flume wall framework 24 and glass 25, is provided with water circulation system 23, makes stream device 22 below tank.
Also comprise data Collection & Processing System 28 and computing machine 29, as shown in Figure 6, multi-components force balance 17, displacement sensor for pull rope 18, PIV particle image velocimeter 26, acoustic Doppler velocimetry 27, generator 13 are connected with the input end of data Collection & Processing System 28 respectively.
During use, current-vibrating mass-generator power coupling experiment analogue means is put in tank, the water pouring into certain depth in tank makes cylinder 4 be submerged under water, tank is installed PIV particle image velocimeter 26, acoustic Doppler velocimetry 27.Start and make stream device 22, current flow along tank, and apply flow force to cylinder 4, and cylinder 4 is with carry-over bar 11 that up-down vibration occurs under the effect of flow force, and tooth bar 11 makes gear 12 rotate by engagement force, and the rotating shaft 21 of drive electrical generators 13 is rotated, and produce electric energy.When current cross cylinder 4, because being subject to impact, the flow field around cylinder 4 and the corresponding change of suffered flow force that cylinder 4 vibrates.Open acoustic Doppler velocimetry 27, PIV particle image velocimeter 26, multi-components force balance 17 and displacement sensor for pull rope 18 to detect the vibration displacement etc. of flow field change around same time period flow velocity, cylinder, dynamic flow force that cylinder different directions is subject to, cylinder respectively, and above-mentioned detection data and generator 13 output voltage signal are transferred to data Collection & Processing System 28 process.
Because the mechanism that influences each other in vortex-induced vibration stream generating device between water body flow, vibrating mass vibration, generator operation is very complicated, simple measuring vibrations displacement and generator output voltage, accurately can not reflect the real work situation of device, and this method collection be at one time current, vibrating mass, generator three produce dynamic data, can reproduce the coupling situation of three according to these data, therefore experimental simulation method of the present invention is closer to the practical working situation of device.
Experimental technique of the present invention, specifically carries out according to following steps:
(1) experimental provision is fixedly mounted in the middle part of tank, avoids moving in experimentation or swinging.Acoustic Doppler velocimetry 27, PIV particle image velocimeter 28, multi-components force balance 17, displacement sensor for pull rope 18 are connected with data Collection & Processing System 28 with the extension line of generator 13, data Collection & Processing System 28 is connected with computing machine 29, guarantee to connect well, this is normal experiment step.
(2) liquid level is specified to water filling in tank, make cylinder 4 be submerged under water, the requirement of the trace particle of PIV particle image velocimeter 27 according to PIV particle image velocimeter 27 is sprinkled in water, and experimental provision is debugged, stir cylinder, observe it and whether move flexibly; Open test macro, confirm that flow velocity test macro, flow field test system, flow force test macro, vibration test system and voltage testing system are working properly, open current generating system, validation test model sport is normal, after all test signals are normal, close current generating system.This is normal experiment step.
(3) open current generating system and carry out vortex-induced vibration test, to under different in flow rate condition, all test parameterss (flow velocity, flow field, flow force, vibration displacement, generator output voltage) are tested, wherein the sample frequency of flow force, vibration displacement and generator output voltage test is not more than 10 times of maximum vortex shedding frequencies, to avoid occurring mixing phenomenon during data analysis.This is conventional test step.
(4) to vortex-induced vibration phenomenon and data analysis, analyze temporal signatures and the spectral property (frequency content, predominant frequency, bandwidth) of lift, drag, vibration displacement and generator output voltage, obtain the relation of the relation of lift and vibration displacement, voltage and vibration displacement and the relation of voltage and lift respectively; The frequency obtaining lift and drag than and Amplitude Ration and the relation with reduction speed thereof; Obtain frequency ratio and Amplitude Ration and the relation with reduction speed thereof of vibration displacement; The frequency obtaining voltage than and Amplitude Ration and the relation with reduction speed thereof; Analyze tail flow field form, obtain the vortex shedding feature with lift, drag, vibration displacement and voltage synchronous; Obtain stream power, oscillation power and generated output power and the relation between them; Obtain energy conversion efficiency at different levels and the relation with reduction speed, lift and vibration displacement thereof; Obtain the current-vibrating mass-impact of generator power coupling on Vortex Shedding, lift, drag, vibration displacement, voltage and energy conversion efficiency.In this step, content is analysis content proposed by the invention, and belong to the core content of invention, its concrete analytical approach belongs to common practise for a person skilled in the art.
Claims (4)
1. current-vibrating mass-generator power coupling experiment analogue means, it is characterized in that, comprise the cylinder (4) be arranged in tank, the two ends of cylinder (4) arrange groove, two multi-components force balances (17) embed groove and are fixed on the two ends of cylinder (4), multi-components force balance (17) is affixed with end plate (5), two end plates (5) are fastenedly connected by angle steel (8), and the upper end of end plate (5) arranges leveling board (6), linear bearing (9); Leveling board (6) bottom arranges Compress Spring (7), Compress Spring (7) lower end is connected with horizontal support structure (15) by fixture, and horizontal support structure (15) is fixed on the outer (2) of flume wall (1); Linear bearing (9) is socketed on line slideway (10), and line slideway (10) is fixed on support frame (14); Support frame (14) welds with horizontal support structure (15), displacement sensor for pull rope (18) is arranged on the top of support frame (14), and the stay cord (19) of displacement sensor for pull rope (18) is connected with leveling board (6); Wherein one piece of end plate (5) in two end plates (5) installs tooth bar (11), tooth bar (11) engages with gear (12), gear (12) is fastenedly connected with the rotating shaft (21) of generator (13), and generator (13) is fixed on support frame (14); Also comprise data Collection & Processing System (28) and computing machine (29), described multi-components force balance (17), displacement sensor for pull rope (18), PIV particle image velocimeter (26), acoustic Doppler velocimetry (27), generator (13) are connected with data Collection & Processing System (28) input end respectively, and PIV particle image velocimeter (26) and acoustic Doppler velocimetry (27) are measured flow field around flow rate of water flow and cylinder.
2. current-vibrating mass according to claim 1-generator power coupling experiment analogue means, is characterized in that, described multi-components force balance (17) is affixed by bolt (20) and end plate (5).
3. current-vibrating mass according to claim 1-generator power coupling experiment analogue means, it is characterized in that, described horizontal support structure (15) is fixed on the outer (2) of flume wall (1) by geometrical clamp (16).
4. current-vibrating mass according to claim 1-generator power coupling experiment analogue means, it is characterized in that, tank is made up of bottom of gullet (3), flume wall (1), flume wall (1) is provided with outer (2), flume wall (1) is made up of flume wall framework (24) and glass (25), is provided with water circulation system (23), makes stream device (22) below tank.
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Cited By (10)
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| CN107023030A (en) * | 2017-03-30 | 2017-08-08 | 河海大学 | Oval pile foundation and its performance test apparatus and method for marine tidal-current energy engineering |
| CN109801538A (en) * | 2019-04-02 | 2019-05-24 | 江苏科技大学 | A kind of Flow vibration generator experimental device based on linear generator |
| CN110311590A (en) * | 2019-07-19 | 2019-10-08 | 武汉理工大学 | A kind of controllable piezoelectric generating device based on vortex-induced vibration principle |
| CN110715782A (en) * | 2019-10-15 | 2020-01-21 | 河海大学 | Vortex-induced vibration suppression experimental device based on nonlinear energy trap |
| CN111641351A (en) * | 2020-05-18 | 2020-09-08 | 扬州大学 | Vortex vibration piezoelectric power generation device with broadband energy collection function |
| CN111706468A (en) * | 2020-05-18 | 2020-09-25 | 扬州大学 | Vortex vibration power generation device with broadband energy collection characteristic |
| CN112229600A (en) * | 2020-09-09 | 2021-01-15 | 中国航天空气动力技术研究院 | Towing tank test device and method for underwater power generation kite |
| CN112696307A (en) * | 2020-12-29 | 2021-04-23 | 哈尔滨工程大学 | Vertical positioning floating type vortex-induced vibration tidal current energy power generation device |
| CN113465875A (en) * | 2021-05-08 | 2021-10-01 | 哈尔滨工程大学 | Flow-induced vibration experimental equipment of virtual spring damping system based on flow velocity self-adaption |
| CN114136522A (en) * | 2021-11-29 | 2022-03-04 | 中国科学院力学研究所 | Force measuring device for flexible structure dragging experiment |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023030A (en) * | 2017-03-30 | 2017-08-08 | 河海大学 | Oval pile foundation and its performance test apparatus and method for marine tidal-current energy engineering |
| CN109801538B (en) * | 2019-04-02 | 2023-10-27 | 江苏科技大学 | Flow induced vibration power generation experimental device based on linear generator |
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| CN110311590B (en) * | 2019-07-19 | 2024-03-08 | 武汉理工大学 | Controllable piezoelectric power generation device based on vortex-induced vibration principle |
| CN110715782A (en) * | 2019-10-15 | 2020-01-21 | 河海大学 | Vortex-induced vibration suppression experimental device based on nonlinear energy trap |
| CN110715782B (en) * | 2019-10-15 | 2021-09-17 | 河海大学 | Vortex-induced vibration suppression experimental device based on nonlinear energy trap |
| CN111641351A (en) * | 2020-05-18 | 2020-09-08 | 扬州大学 | Vortex vibration piezoelectric power generation device with broadband energy collection function |
| CN111706468A (en) * | 2020-05-18 | 2020-09-25 | 扬州大学 | Vortex vibration power generation device with broadband energy collection characteristic |
| CN112229600A (en) * | 2020-09-09 | 2021-01-15 | 中国航天空气动力技术研究院 | Towing tank test device and method for underwater power generation kite |
| CN112696307A (en) * | 2020-12-29 | 2021-04-23 | 哈尔滨工程大学 | Vertical positioning floating type vortex-induced vibration tidal current energy power generation device |
| CN113465875A (en) * | 2021-05-08 | 2021-10-01 | 哈尔滨工程大学 | Flow-induced vibration experimental equipment of virtual spring damping system based on flow velocity self-adaption |
| CN114136522A (en) * | 2021-11-29 | 2022-03-04 | 中国科学院力学研究所 | Force measuring device for flexible structure dragging experiment |
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