CN204267435U - A kind of ducting side interlayer damping device - Google Patents
A kind of ducting side interlayer damping device Download PDFInfo
- Publication number
- CN204267435U CN204267435U CN201420588316.2U CN201420588316U CN204267435U CN 204267435 U CN204267435 U CN 204267435U CN 201420588316 U CN201420588316 U CN 201420588316U CN 204267435 U CN204267435 U CN 204267435U
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- pipe
- damping device
- interior pipe
- outer tube
- turbulent flow
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Abstract
The utility model relates to a kind of Flows boundary layer damping device, specifically relate to a kind of boundary layer damping device be applied in wall viscous resistance and the powerful larger conveying pipe of turbulent flow, it is not when doing special processing to existing pipeline, install thin walled inner pipes additional therein, and open aperture on inner pipe wall; Interior pipe fluid ingress is provided with convergent jet pipe, and it can form the spray object on inner tubal wall face in whole pipeline, reduces viscous resistance loss.For turbulent flow, the utility model weakens the turbulence losses in caliber direction in addition, plays the effect of rectification.When turbulent flow, when the speed on caliber direction is greater than injection rate, liquid enters interlayer, when the speed on caliber direction is not more than injection rate, there is spray effect, this reduces the impacting rebound of fluid on tube wall, faster the radial velocity in main flow can be offset, turbulent flow is integrated into laminar flow.
Description
Technical field
The utility model relates to a kind of Flows boundary layer damping device, specifically relates to a kind of boundary layer damping device be applied in wall viscous resistance and the powerful larger conveying pipe of turbulent flow.
Background technique
At present, for research and the practice of drag reduction method, mainly comprise ditch channel process, bubble method, soft wall approach, polymer additive method, polymeric coating layer drag reduction and Wall Vibration drag reduction etc.But on the conceptual design of pipeline drag reduction, ditch channel process, bubble method, soft wall approach not easily realize; Polymeric coating layer drag reduction and Wall Vibration drag reduction are in test or theoretical research stage at present mostly; Although polymer additive method is used widely, the use qualifications of friction-reducing additive is too many, is not especially suitable for laminar drag reduction.
Summary of the invention
In view of prior art Problems existing, the purpose of this utility model to provide ducting side interlayer damping device, and it forms injection rate on wall, realizes the object reducing flow resistance.
To achieve these goals, the technological scheme that the utility model adopts is ducting side interlayer damping device, comprise: outer tube and interior pipe, interior pipe box is contained in outer tube, diameter of inner pipe is determined according to outer tube diameter, be advisable with about 90% of outer tube diameter, form interlayer between outer tube and interior pipe, outer tube connects respectively by being connected support plate with interior pipe two ends; Interior pipe one end is provided with convergent jet pipe; Inner pipe wall is evenly provided with spray orifice, spray orifice adopts in order or staggered mode, the quantity of spray orifice can angularly distribute in radial direction, as every 10 ° are opened a hole, the quantity of axial aperture can be determined according to physical properties of fluids and designing requirement, if fluid viscosity is comparatively large, the number of openings can suitably increase, and the overall principle realizes spray orifice to have enough flows and flow velocity to destroy boundary layer.
Described connection support plate is streamlined structure.
Described convergent jet pipe is truncated conical shape, and the external diameter of one end that its radius is little is identical in interior pipe external diameter; The other end external diameter is greater than interior pipe external diameter and is less than outer tube diameter; The thickness of convergent jet pipe is identical with interior tube thickness; The angle of convergent jet pipe is 5 ° ~ 20 °.
The working procedure of this device: fluid flows into from outer tube inlet, enters interior pipe and interlayer respectively, and in flowing into, the fluid of pipe is by the convergent jet pipe of interior pipe front end, is accelerated by convergent jet pipe, and the flow velocity entering the fluid of interior pipe increases, and its pressure reduces accordingly; Enter the fluid of interlayer by convergent jet pipe, start section runner flaring, flow velocity declines, pressure increase; The inside and outside both sides mineralization pressure of interior pipe is poor, and the fluid in interlayer sprays into interior pipe from the aperture of inner pipe wall, realizes spray.
The utility model has the advantage of: it, when not doing special processing to existing pipeline, installs thin walled inner pipes additional therein, and opens aperture on inner pipe wall; Interior pipe fluid ingress is provided with convergent jet pipe, and it can form the spray object on inner tubal wall face in whole pipeline, reduces viscous resistance loss.For turbulent flow, the utility model weakens the turbulence losses in caliber direction in addition, plays the effect of rectification.When turbulent flow, when the speed on caliber direction is greater than injection rate, liquid enters interlayer, when the speed on caliber direction is not more than injection rate, there is spray effect, this reduces the impacting rebound of fluid on tube wall, faster the radial velocity in main flow can be offset, turbulent flow is integrated into laminar flow; And not increasing moving element, outside support equipment, do not need extra drive unit, additive, need be only pressure energy by the kinetic transformation of a small amount of fluid of conveying.In a word, the utility model does not need to do special processing to pipeline, and structure is simple, makes, easy installation and reliable, and drag-reduction effect is obvious.
Accompanying drawing explanation
Fig. 1 is schematic three dimensional views of the present utility model;
Fig. 2 is the schematic three dimensional views of pipe in the utility model;
Fig. 3 is the utility model along the sectional drawing of pipeline center's vertical direction and pressure distribution schematic diagram;
Fig. 4 is front view of the present utility model, left view;
In figure: 1, outer tube, 2, interior pipe, 3, convergent jet pipe, 4, spray orifice, 5, connect support plate, 6, interlayer.
Embodiment
In order to understand this ducting side interlayer damping device further, be described as follows below in conjunction with accompanying drawing.
It comprises outer tube 1, and outer tube 1 does not do special processing, and thin walled inner pipes 2 is equipped with in 1 pipe inside outside, and interior pipe 2 even tube wall establishes spray orifice 4.Interior pipe 1 fluid input place (the pipeline section of beginning) is connected with convergent jet pipe 3, and the external diameter of interior pipe 2 is less than and outer tube 1 internal diameter, forms interlayer 6 between interior pipe 2 and outer tube 1, and interlayer 6 thickness is determined by the physical property of fluid and speed; Outer tube 1 is connected respectively by streamlined connection support plate 5 with interior pipe 2 two ends; Connecting support plate 5 adopts streamlined reduction to enter the flow resistance of interlayer 6; Fluid enters interior pipe 2 and interlayer 6 when flowing into respectively, and interior pipe 2 front end is convergent jet pipe 3, and the flow velocity entering the fluid of interior pipe 2 has certain increase, and pressure reduces accordingly; The fluid entering interlayer 6 is just the opposite, and start section runner flaring, flow velocity declines, pressure increase; The inside and outside both sides mineralization pressure of interior pipe 2 is poor, and the fluid in interlayer 6 sprays into interior pipe 2 from the aperture of interior pipe 2 tube wall, realizes the object of spray.
Claims (4)
1. a ducting side interlayer damping device, comprising: outer tube and interior pipe, and interior pipe box is contained in outer tube, and diameter of inner pipe is outer tube diameter 88-92%, forms interlayer between outer tube and interior pipe, and outer tube connects respectively by being connected support plate with interior pipe two ends; Interior pipe one end is provided with convergent jet pipe; Inner pipe wall is evenly provided with spray orifice, and spray orifice adopts in order or staggered mode, and the quantity of spray orifice can angularly distribute in radial direction.
2. a kind of ducting side interlayer damping device according to claim 1, is characterized in that: be describedly angularly distributed as every 10 ° and open a hole.
3. a kind of ducting side interlayer damping device according to claim 1, is characterized in that: described connection support plate is streamlined structure.
4. a kind of ducting side interlayer damping device according to claim 1, is characterized in that: described convergent jet pipe is truncated conical shape, and the external diameter of one end that its radius is little is identical in interior pipe external diameter; The other end external diameter is greater than interior pipe external diameter and is less than outer tube diameter; The thickness of convergent jet pipe is identical with interior tube thickness; The angle of convergent jet pipe is 5 ° ~ 20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420588316.2U CN204267435U (en) | 2014-10-11 | 2014-10-11 | A kind of ducting side interlayer damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420588316.2U CN204267435U (en) | 2014-10-11 | 2014-10-11 | A kind of ducting side interlayer damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204267435U true CN204267435U (en) | 2015-04-15 |
Family
ID=52802306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420588316.2U Expired - Fee Related CN204267435U (en) | 2014-10-11 | 2014-10-11 | A kind of ducting side interlayer damping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204267435U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358750A (en) * | 2014-10-11 | 2015-02-18 | 沈阳航空航天大学 | Pipeline boundary layer damping device |
| CN112377936A (en) * | 2020-11-18 | 2021-02-19 | 哈尔滨锅炉厂有限责任公司 | Method for reducing resistance of boiler flue gas duct system |
-
2014
- 2014-10-11 CN CN201420588316.2U patent/CN204267435U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358750A (en) * | 2014-10-11 | 2015-02-18 | 沈阳航空航天大学 | Pipeline boundary layer damping device |
| CN112377936A (en) * | 2020-11-18 | 2021-02-19 | 哈尔滨锅炉厂有限责任公司 | Method for reducing resistance of boiler flue gas duct system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20161011 |