CN204536359U - A kind of ventilation hole internal particle dispensing device based on PIV - Google Patents
A kind of ventilation hole internal particle dispensing device based on PIV Download PDFInfo
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- CN204536359U CN204536359U CN201520151709.1U CN201520151709U CN204536359U CN 204536359 U CN204536359 U CN 204536359U CN 201520151709 U CN201520151709 U CN 201520151709U CN 204536359 U CN204536359 U CN 204536359U
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Abstract
The utility model discloses a kind of ventilation hole internal particle dispensing device based on PIV, belong to PIV measurement mechanism technical field.Device comprises the source of the gas of cavitation device, PIV particle, particle case and outside; Cavitation device is closed rectangular housing, and its side is processed with air hole, cavitation device is connected with draft tube and communicates with inner cavity; Particle case is similarly closed rectangular housing, and its side is also processed with air hole, particle case is connected with inlet pipe connection and communicates with cavity; Particle case is connected by the side of inlet pipe connection with described cavitation device, particle case is made to be positioned at the middle position of cavitation device inside, particle case, built with PIV particle, forms a cavity between the outside surface of particle case and the inside surface of cavitation device.The utility model reliably at the uniform particle of the inner spreading in ventilation hole, can be convenient to measurement and the application of PIV system.
Description
Technical field
Utility model relates to a kind of PIV measurement mechanism, is specifically related to a kind of ventilation hole internal particle dispensing device, belongs to PIV measurement mechanism technical field.
Background technology
The development of flow measurement technology is for research and to solve a series of underlying issues that the industry such as Aeronautics and Astronautics, boats and ships relates to significant, and wherein the development of PIV technology is widely used for the research of flow field internal motion characteristic.Ventilation cavitation, as the effective drag reduction approach of one, has good development prospect, and research ventilation cavitating flow has important practical value.But the PIV at present for ventilation cavitating flow measures the flowing details that only can obtain around ventilation hole Flow Field outside, for the measurement of ventilation hole internal gas flow still without suitable pathways, this is caused by the principle of work of PIV.The measurement of PIV stream field is by record and the position analyzing the particle of institute's spreading in flow field realizes: the LASER Light Source in PIV system irradiates the particle in flow field, and the position of supporting CCD camera record particle is also undertaken by the poster processing soft analyzing the information such as flow field structure, flow velocity that can draw local.For ventilation hole, because the particle spreading of its inside is comparatively difficult, in ventilation flow field, do not have particle, CCD camera also records the particle picture less than inside, hole, and then just cannot analyze the movable information obtaining ventilation flow field.Therefore, in order to analyse in depth the kinetic characteristic in ventilation flow field, the how reliable and effective spreading of ventilation hole internal particle is problem demanding prompt solution.
Utility model content
In view of this, the utility model provides a kind of ventilation hole internal particle dispensing device based on PIV, reliably at the uniform particle of the inner spreading in ventilation hole, can be convenient to measurement and the application of PIV system.
Based on a ventilation hole internal particle dispensing device of PIV, comprise the source of the gas of cavitation device, PIV particle, particle case and outside;
Described cavitation device is closed housing, and its side is processed with air hole, cavitation device is connected with draft tube and communicates with inner cavity;
Described particle case is similarly closed rectangular housing, and its side is also processed with air hole, particle case is connected with inlet pipe connection and communicates with cavity;
Its integrated connection closes: described particle case is connected by the side of inlet pipe connection with described cavitation device, particle case is made to be positioned at the middle position of cavitation device inside, particle case, built with PIV particle, forms a cavity between the outside surface of particle case and the inside surface of cavitation device.
Further, the air hole processing on described particle case, on the side except lower surface, prevents particle from leaking in cavitation device before spreading.
Principle of work: before experiment, deposits appropriate PIV particle in advance in the internal cavities of particle storing unit, and particle dispensing device is fixedly mounted on water tunnel test intersegmental part by the left side of cavitation device and right side; When test is carried out, external air source constantly passes into gas by draft tube in cavitation device, under the effect of water hole incoming flow, cavitation device rear portion is made to form a larger ventilation hole from the air hole effluent air of cavitation device, continual air-flow ensures to ventilate in flow field the formation in hole, and the flow backwards in water hole also can be avoided to enter cavitation device inside; Simultaneously, by inlet pipe connection to the inner air feed of particle case, the gas entering particle case in cavity with the PIV mix particles depositing its inside in advance after, discharged by the air hole on particle case surface, in cavity between cavitation device and particle case, the air-flow being mixed with particle that the air hole of particle case is discharged mixes again with the gas that draft tube passes into cavitation device inside, discharged by the air hole of cavitation device side, the particle of ventilation inside, hole can be evenly distributed.
Beneficial effect:
1, particle storing unit is placed in cavitation device inside by the utility model, utilizes cavity between the two to make particle and air carry out secondary and mixes, and the distribution of particles being conducive to ventilating in hole is even, can be convenient to measurement and the observation of PIV system.
2, the utility model have employed the form that external air source is carried out respectively to particle case and cavitation device inside, even if there is cavitation device internal pressure deficiency to produce the phenomenon of pouring in down a chimney, because particle case inside also has air pressure to exist, can ensure that liquid can not enter in particle case, the reliability of device is improved greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model particle diffusion device;
Fig. 2 is the structural representation of the utility model cavitation device;
Fig. 3 is the structural representation of the utility model particle case;
Fig. 4 is the schematic diagram that the utility model carries out testing in water tunnel test section.
Wherein, 1-water tunnel test section, 2-particle dispensing device, 3-gas-liquid interface, 4-ventilation hole, 5-water body, 6-air hole Exhaust Gas, 7-cavitation device, 8-air hole I, 9-draft tube, 10-particle case, 11-air hole II, 12-inlet pipe connection.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of ventilation hole internal particle dispensing device based on PIV, comprises the source of the gas of cavitation device 7, PIV particle, particle case 10 and outside;
As shown in Figure 2, described cavitation device 7 is the housing closed, the left surface of cavitation device 7 and right flank and fluoran stream surface parallel to each other with lee side and consistent with water (flow) direction, there is angle in upper surface and lower surface and water (flow) direction, air hole I 8 on cavitation device 7 is processed on upper surface and lower surface, cavitation device 7 is connected with draft tube 9 and communicates with inner cavity.
As shown in Figure 3, described particle case 10 is the rectangular housing closed, its side is also processed with air hole II 11, particle case 10 is connected with inlet pipe connection 12 to communicate with cavity, the air hole II 11 on described particle case 10 is arranged on a side consistent with water hole water (flow) direction and vertical with water hole water (flow) direction side.
Its integrated connection closes: described particle case 10 is connected with the side of described cavitation device 7 by inlet pipe connection 12, particle case 10 is made to be positioned at the middle position of cavitation device 7 inside, particle case 10, built with PIV particle, forms a cavity between the outside surface of particle case 10 and the inside surface of cavitation device 7.
Principle of work is as shown in Figure 4: before experiment, in the internal cavities of particle storing unit 10, deposit appropriate PIV particle in advance, and it is inner that particle dispensing device 2 is fixedly mounted on water tunnel test section 1 by the left side of cavitation device 7 and right side; When test is carried out, external air source constantly passes into gas by draft tube 9 in cavitation device 7, under the effect of water hole incoming flow, cavitation device 7 rear portion is made to form a larger ventilation hole 4 from air hole I 8 effluent air, continual air-flow ensures to ventilate in flow field the formation in hole, the flow backwards in water hole also can be avoided to enter cavitation device 7 inner; Simultaneously, by inlet pipe connection 12 to the inner air feed of particle case 10, the gas entering particle case 10 in cavity with the mix particles depositing its inside in advance after, discharged by the air hole II 11 on particle case surface: in the cavity between cavitation device 7 and particle case 10, the air-flow being mixed with particle that the air hole II 11 of particle case 10 is discharged mixes again with the gas that draft tube 9 passes into cavitation device inside, discharged by cavitation device 7 side air hole I 8, the particle of ventilation inside, hole can be evenly distributed.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. based on a ventilation hole internal particle dispensing device of PIV, it is characterized in that, comprise cavitation device (7), PIV particle, particle case (10) and outside source of the gas;
Described cavitation device (7) is the housing closed, and its side is processed with air hole, cavitation device (7) is connected with draft tube (9) and communicates with inner cavity;
Described particle case (10) is similarly closed rectangular housing, and its side is also processed with air hole, particle case (10) is connected with inlet pipe connection (12) and communicates with cavity;
Its integrated connection closes: described particle case (10) is connected by the side of inlet pipe connection (12) with described cavitation device (7), particle case (10) is made to be positioned at the inner middle position of cavitation device (7), particle case (10), built with PIV particle, forms a cavity between the outside surface of particle case (10) and the inside surface of cavitation device (7).
2. a kind of ventilation hole internal particle dispensing device based on PIV as claimed in claim 1, is characterized in that, on described particle case (10) air hole processing on the side except lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151709.1U CN204536359U (en) | 2015-03-17 | 2015-03-17 | A kind of ventilation hole internal particle dispensing device based on PIV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151709.1U CN204536359U (en) | 2015-03-17 | 2015-03-17 | A kind of ventilation hole internal particle dispensing device based on PIV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204536359U true CN204536359U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520151709.1U Expired - Fee Related CN204536359U (en) | 2015-03-17 | 2015-03-17 | A kind of ventilation hole internal particle dispensing device based on PIV |
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| CN (1) | CN204536359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730286A (en) * | 2015-03-17 | 2015-06-24 | 北京理工大学 | Venting cavity inside particle dispensing device based on PIV |
-
2015
- 2015-03-17 CN CN201520151709.1U patent/CN204536359U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730286A (en) * | 2015-03-17 | 2015-06-24 | 北京理工大学 | Venting cavity inside particle dispensing device based on PIV |
| CN104730286B (en) * | 2015-03-17 | 2017-08-25 | 北京理工大学 | A kind of ventilation hole internal particle dispensing device based on PIV |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160317 |
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| CF01 | Termination of patent right due to non-payment of annual fee |