CN1217302C - Free vortex, point sink and point vortex superposition demonstrator - Google Patents
Free vortex, point sink and point vortex superposition demonstrator Download PDFInfo
- Publication number
- CN1217302C CN1217302C CN 200310106527 CN200310106527A CN1217302C CN 1217302 C CN1217302 C CN 1217302C CN 200310106527 CN200310106527 CN 200310106527 CN 200310106527 A CN200310106527 A CN 200310106527A CN 1217302 C CN1217302 C CN 1217302C
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- vortex
- point
- pipe
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- tank
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Abstract
The present invention relates to a free vortex demonstration instrument for demonstrating Rankine combined vortexes, free vortexes, and point sink and point vortex superposition. The present invention comprises a supporting bar 1, a water storage tank 2, a supporting plate 3, a bottom hole pipe 4, a cylinder water tank 5, a return pipe 7 and a water pump 9, wherein the water pump 9 is arranged in the lower water storage tank 2 and is connected with one end of a water inlet pipe 8 of which the other end is connected with the cylinder water tank 5; the return pipe 7 is connected between the water storage tank 2 and the cylinder water tank 5; the bottom centre of the cylinder water tank 5 is provided with the bottom hole pipe 4, and the cylinder water tank 5 is placed on the supporting plate 3 which is supported by the supporting bar 1; valves are arranged on the bottom hole pipe 4, the return pipe and the water inlet pipe 8. The present invention has the advantages of simple structure, and convenient manufacture and use; the present invention can visually demonstrate Rankine combined vortexes, free vortexes, and point sink and point vortex superposition.
Description
Technical field
What the present invention relates to is a kind of free vortex demonstrator of demonstrating Rankine combined vortex, free vortex and point sink, point unit vortex stack.Belong to the hydraulics technical field.
Background technology
Prior art can only be demonstrated free vortex, and its structure mainly is that the bottom centre at cylinder has a circular hole, and it can make the water surface on top form free vortex naturally when converge at the center.
Summary of the invention
The objective of the invention is to the defective of depositing, propose a kind ofly not only can demonstrate free vortex but also can demonstrate the Rankine combined vortex and point sink and point unit vortex superposition demonstrator at above-mentioned.Technical solution of the present invention: its structure comprises support bar, water storage tank, back up pad, bottom outlet pipe, cylinder tank, return pipe, water pump composition, wherein water pump is located in the water tank of bottom, water pump taps into an end of water pipe, the other end and the cylinder tank of water inlet pipe are tangent, its tangent formation junction, return pipe is connected between water storage tank and cylinder tank, the bottom outlet pipe is equipped with in the bottom centre of cylinder tank, cylinder tank is placed on the back up pad, back up pad is equipped with valve by they sup-port on bottom outlet pipe, return pipe, the water inlet pipe.Advantage of the present invention: simple in structure, making, easy to use, can demonstrate the stack of Rankine combined vortex, free vortex and point sink and point unit vortex intuitively.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Accompanying drawing 2 is cylinder and water inlet pipe junction synoptic diagram (this junction makes current make circular motion)
Accompanying drawing 3 is free vortex synoptic diagram
Accompanying drawing 4 is point sink and point unit vortex stack synoptic diagram.
Among the figure 1 is support bar, the 2nd, water storage tank, the 3rd, back up pad, the 4th, bottom outlet pipe, the 5th, cylinder tank, the 6th, the junction, the 7th of cylinder tank 5 and water inlet pipe 8, return pipe, the 8th, water inlet pipe, the 9th, water pump.
Embodiment
The contrast accompanying drawing, water pump 9 is located in the water storage tank 2, water pump 9 taps into an end of water pipe 8, the other end of water inlet pipe 8 and cylinder tank 5 are tangent, its tangent formation junction, and return pipe 7 is connected 5 of water storage tank 2 and cylinder tanks, bottom outlet pipe 4 is equipped with in the bottom centre of cylinder tank 5, cylinder tank 5 is placed on the back up pad 3, and back up pad 3 supports by support bar 1, on bottom outlet pipe 4, return pipe 7, the water inlet pipe 8 valve is housed.The course of work: start water pump 9 water of reserve tank 2 is sent into cylinder tank 5 to certain water level by water inlet pipe 8, the valve that be contained on bottom outlet pipe 4, the return pipe 7 this moment is closed.Then, close valve on the water inlet pipe 8.Open the valve on the bottom outlet pipe 4, in cylinder tank 5, form free vortex, Free Surface position h this moment
H in the following formula
oBe the height of unlimited distance free-water level to the r axle, v
θBe velocity at tangential component, g is an acceleration, r is a radius.
The stream function of free vortex
ψ=Г .Lnr/2 π, Γ (circular rector)
When radius r=o is that valve on the bottom outlet pipe 4 is closed suddenly and formed Rankine combined vortex section.
Regulate the valve on the water inlet pipe 8, current are evenly entered and tangentially make circular motion, flow out through bottom outlet simultaneously and form point sink and point unit vortex superpose (as Fig. 4) along cylindrical wall.
ψ (stream function)=ψ
1+ ψ
2=(q θ-Γ Lnr)/2 π φ (potential function)=φ
1+ φ
2=(qLnr+ Γ θ)/2 π
Claims (1)
1, not only free vortex can be demonstrated but also the Rankine combined vortex can be demonstrated, and point sink and point unit vortex superposition demonstrator, it is characterized in that comprising support bar (1), water storage tank (2), back up pad (3), bottom outlet pipe (4), cylinder tank (5), return pipe (7), water pump (9) is formed, wherein water pump (9) is located in the water storage tank (2), water pump (9) taps into an end of water pipe (8), the other end of water inlet pipe (8) and cylinder tank (5) are tangent, its tangent formation junction (6), return pipe (7) is connected between water storage tank (2) and cylinder tank (5), bottom outlet pipe (4) is equipped with in the bottom centre of cylinder tank (5), cylinder tank (5) is placed on the back up pad (3), back up pad (3) supports by support bar (1), bottom outlet pipe (4), return pipe (7), water inlet pipe is equipped with valve on (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106527 CN1217302C (en) | 2003-12-04 | 2003-12-04 | Free vortex, point sink and point vortex superposition demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310106527 CN1217302C (en) | 2003-12-04 | 2003-12-04 | Free vortex, point sink and point vortex superposition demonstrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1547177A CN1547177A (en) | 2004-11-17 |
| CN1217302C true CN1217302C (en) | 2005-08-31 |
Family
ID=34334221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310106527 Expired - Fee Related CN1217302C (en) | 2003-12-04 | 2003-12-04 | Free vortex, point sink and point vortex superposition demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1217302C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979983B (en) * | 2010-05-26 | 2012-11-07 | 上海大学 | Experimental device of free surface vortex forming and evolving mechanism |
| CN101980323A (en) * | 2010-11-12 | 2011-02-23 | 合肥通用机械研究院 | Device for demonstrating eddy phenomenon |
| CN108597323A (en) * | 2018-05-03 | 2018-09-28 | 江苏科技大学 | A kind of experimental provision and its operating method of simulation Rankine combined vortex |
-
2003
- 2003-12-04 CN CN 200310106527 patent/CN1217302C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1547177A (en) | 2004-11-17 |
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| 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 |