CN203686383U - Circular pipe with bionic groove face - Google Patents
Circular pipe with bionic groove face Download PDFInfo
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- CN203686383U CN203686383U CN201320875326.XU CN201320875326U CN203686383U CN 203686383 U CN203686383 U CN 203686383U CN 201320875326 U CN201320875326 U CN 201320875326U CN 203686383 U CN203686383 U CN 203686383U
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- groove
- pipe
- bionical
- inwall
- height
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Abstract
The utility model discloses a circular pipe with a bionic groove face. First grooves and second grooves are formed in the inner wall of the circuit pipe; the sections of the first grooves and the second grooves are triangular; the height c of the first groove relative to the inner wall is greater than the height d of the second groove relative to the inner wall; the first grooves and the second grooves are alternately and continuously distributed in the inner wall. According to the circular pipe with the bionic groove face, the grooves are formed in the pipe, the thickness of a viscous sublayer on the surface of the inner wall of the circular pipe is increased, the disturbance nearby the near wall of the rotational vortex is reduced, the frictional resistance is reduced, energy sources are reduced, and a positive promotion effect is realized for global energy conservation, emission reduction and environment protection.
Description
Technical field
The utility model relates to pipe, is specifically related to a kind of pipe with bionical grooved surface.
Background technique
Along with global energy consumption is constantly risen, scientists is put into increasing energy how to effectively utilize and protect on the field of the energy.Oil and natural gas is as the topmost energy constituent element in the world today.At present, oil and natural gas adopts pipe to grow distance conveying conventionally.Meanwhile, in steamer and automobile, also often use some fluids such as pipe gasoline feed, water.The oil, rock gas, gasoline and the water or other fluid that are transferred, in the time of Flow In A Circular Tube, can form thinner viscous sublayer in the inner wall surface of pipe.Due to the inner wall smooth of these pipes, the thickness of viscous sublayer is less, therefore the surface friction drag that oil or rock gas are subject in the time of Flow In A Circular Tube is larger, this,, by causing a large amount of energy wastes, causes passive impact to the protection of environment.Meanwhile, fluid when turbulence state current downflow, can produce rotation whirlpool in pipe in pipe near wall region; this rotation whirlpool will affect the flowing velocity of fluid in pipe; and can consume the larger energy, cause energy waste, the protection of environment is produced to passive impact.
Model utility content
The purpose of this utility model is the deficiency existing in order to overcome above prior art, provides a kind of simple and reasonable for structure, can reduce the pipe with bionical grooved surface of surface friction drag energy saving.
The purpose of this utility model realizes by following technological scheme: the pipe originally with bionical grooved surface, the inwall of described pipe is provided with the first groove and the second groove, the cross section of described the first groove and the second groove is all triangular in shape, and described the first groove is greater than the height d of the second groove with respect to inwall with respect to the height c of inwall; Described the first groove and the second groove alternately and continuous distributed in inwall.
For further reducing surface friction drag, between described the first groove and the second groove, be provided with interval.
Preferred as one, the width e at described interval is 0.5 times of width b of the second channel bottom.
For further reducing surface friction drag, described the first groove is closely connected with the second groove, and the bottom of the bottom of described the first groove and the second groove directly links together.
The cross section of described the first groove and the second groove is all isosceles triangle.The first groove and the second trench cross section are isosceles triangle, are attached to the better effects if of cancelling out each other in groove face and synergistic a pair of horizontal whirlpool, and this order reduces the better effects if of surface friction drag.
Preferred as one, described the first groove is 0.1mm～0.2mm with respect to the height c of inwall.
Described the second groove is the half of the first groove with respect to the height c of inwall with respect to the height d of inwall.
Described the first groove equates with respect to the height c of inwall and the width a of the bottom of the first groove; Described the second groove equates with respect to the height d of inwall and the width b of the bottom of the second groove.
The utility model has advantages of as follows with respect to prior art: originally have the pipe of bionical grooved surface by groove is set in pipe; increase the thickness of the viscous sublayer on round tube inner wall surface; therefore reduced surface friction drag; save the energy, global energy-saving and emission-reduction and environmental protection have been had to positive promoting effect.The inwall originally with the pipe of bionical grooved surface is provided with the first groove and the second groove, and the height of the first groove is higher than the second groove, form secondary vortices at the tip of the first groove, and the secondary vortices producing weakens near rotation whirlpool, the first groove tip, the a pair of horizontal whirlpool that is simultaneously attached to the first groove or the second groove side surface can interact, due to rotation whirlpool, secondary vortices and the laterally acting in conjunction in whirlpool, suppress bursting of turbulent flow, reduce surface friction drag.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1 the pipe with bionical grooved surface.
Fig. 2 is the exploded view at local A place in Fig. 1.
Fig. 3 is the drag reduction mechanism schematic diagram in embodiment 1.
Fig. 4 is the structural representation of embodiment 2 the pipe with bionical grooved surface.
Fig. 5 is the exploded view at local B place in Fig. 4.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The pipe with bionical grooved surface as depicted in figs. 1 and 2, the inwall of described pipe is provided with the first groove 1 and the second groove 2, the cross section of described the first groove 1 and the second groove 2 is all triangular in shape, and described the first groove 1 is greater than the height d of the second groove 2 with respect to inwall with respect to the height c of inwall; Described the first groove 1 and the second groove 2 alternately and continuous distributed in inwall.
For further reducing surface friction drag, between described the first groove 1 and the second groove 2, be provided with interval 3.Meanwhile, this design also can reduce the use of material, reduces production costs.In the time thering is interval 3 between the first groove 1 and the second groove 2, by experiment test fluid respectively smooth pipe with originally there is bionical grooved surface pipe flow time resistance as table 1:
Table 1
Wherein, Re represents reynolds' number, for characterizing the dimensionless number of fluid mobility status.And the surface friction drag that drag reduction amount is smooth pipe deducts the surface friction drag of the pipe with bionical grooved surface again divided by smooth surface friction drag.From the data in table 1, the pipe with bionical grooved surface has very good drag-reduction effect, therefore originally have the conveying that the pipe of bionical grooved surface is more conducive to fluid.
By experiment test fluid respectively smooth pipe with originally there is bionical grooved surface pipe flow time flow field situation as table 2:
Table 2
Wherein, Re represents reynolds' number, for characterizing the dimensionless number of fluid mobility status.Increasing amount be the viscous sublayer thickness with the pipe of bionical grooved surface deduct smooth pipe viscous sublayer thickness again divided by the viscous sublayer thickness of smooth pipe.From the data in table 2, the pipe originally with bionical grooved surface has thicker viscous sublayer, and this will have extraordinary drag-reduction effect, be conducive to the conveying of fluid.
Preferred as one, the width e at described interval 3 is 0.5 times of width b of the second groove 2 bottoms.
The cross section of described the first groove 1 and the second groove 2 is all isosceles triangle.The first groove 1 and the second groove 2 cross sections are isosceles triangle, are attached to the better effects if of cancelling out each other in groove face and synergistic a pair of horizontal whirlpool 6, and this order reduces the better effects if of surface friction drag.
Preferred as one, described the first groove 1 is 0.15mm with respect to the height c of inwall.
Described the second groove 2 is the half of the first groove 1 with respect to the height c of inwall with respect to the height d of inwall.
Described the first groove 1 equates with respect to the height c of inwall and the width a of the bottom of the first groove 1; Described the second groove 2 equates with respect to the height d of inwall and the width b of the bottom of the second groove 2.
Originally there is the drag reduction mechanism of the pipe of bionical grooved surface:
Fluid flows steadily in the near wall of pipe, the first groove 1 and the second groove 2 have reduced the flow to speed of fluid near wall place, increased the thickness of the viscous sublayer of round tube inner wall, due to the effect of viscous sublayer, the surface friction drag between fluid and round tube inner wall in pipe reduces;
Simultaneously, as shown in Figure 3, when fluid is during at Flow In A Circular Tube, because the internal face of pipe is provided with the first groove 1 and the second groove 2, and the height of the first groove 1 is higher than the height of the second groove 2, near the first groove 1, can form the rotation whirlpool 4 turning clockwise, and in the less secondary vortices 5 of groove most advanced and sophisticated place formation rotating diameter, and secondary vortices 5 is contrary with the sense of rotation in rotation whirlpool 4, be that the sense of rotation of secondary vortices 5 is for counterclockwise, this has weakened the intensity in rotation whirlpool 4, thereby has suppressed bursting of turbulent flow, produces the effect of drag reduction; Meanwhile, the groove face of the both sides of each the first groove 1 and the second groove 2 all can be attached with horizontal whirlpool 6, and the horizontal whirlpool 6 that is positioned at the both sides groove face of same the first groove or the second ditch is the horizontal whirlpool 6 of a pair of opposite direction, thereby this can cancel out each other them to the mobile disturbance of fluid between the first groove 1 and the second groove 2 to horizontal whirlpool 6, can keep fluid in the mobile stationarity of nearly inner wall area.Therefore because the acting in conjunction of the first groove 1 and the second groove 2 has suppressed the Turbulence-bursting of pipe near-wall region fluid, reduce the surface friction drag between fluid and pipe.
The pipe originally with bionical grooved surface is except following technical characteristics is in same embodiment 1: as shown in Figure 4 and Figure 5, for further reducing surface friction drag, described the first groove 1 is closely connected with the second groove 2, and the bottom of the bottom of described the first groove 1 and the second groove 2 directly links together.
In the time there is no interval between the first groove 1 and the second groove 2, be that the bottom of described the first groove 1 and the bottom of the second groove 2 directly link together, by experiment test fluid respectively smooth pipe with originally there is bionical grooved surface pipe flow time resistance as table 3:
Table 3
Wherein, Re represents reynolds' number, for characterizing the dimensionless number of fluid mobility status.And the surface friction drag that drag reduction amount is smooth pipe deducts the surface friction drag of the pipe with bionical grooved surface again divided by smooth surface friction drag.From the data in table 3, the pipe originally with grooved surface has very good drag-reduction effect, therefore originally have the conveying that the pipe of bionical grooved surface is more conducive to fluid.
By experiment test fluid respectively smooth pipe with originally there is bionical grooved surface pipe flow time flow field situation as table 4:
Table 4
Wherein, Re represents reynolds' number, for characterizing the dimensionless number of fluid mobility status.Increasing amount be the viscous sublayer thickness with the pipe of bionical grooved surface deduct smooth pipe viscous sublayer thickness again divided by the viscous sublayer thickness of smooth pipe.From the data in table 4, the pipe originally with bionical grooved surface has thicker viscous sublayer, and this will have extraordinary drag-reduction effect, be conducive to the conveying of fluid.
Above-mentioned embodiment is preferred embodiment of the present utility model; can not limit the utility model; other any change that does not deviate from the technical solution of the utility model and make or other equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (8)
1. one kind has the pipe of bionical grooved surface, it is characterized in that: the inwall of described pipe is provided with the first groove and the second groove, the cross section of described the first groove and the second groove is all triangular in shape, and described the first groove is greater than the height d of the second groove with respect to inwall with respect to the height c of inwall; Described the first groove and the second groove alternately and continuous distributed in inwall.
2. the pipe with bionical grooved surface according to claim 1, is characterized in that: between described the first groove and the second groove, be provided with interval.
3. the pipe with bionical grooved surface according to claim 2, is characterized in that: the width e at described interval is 0.5 times of width b of the second channel bottom.
4. the pipe with bionical grooved surface according to claim 1, is characterized in that: described the first groove is closely connected with the second groove, and the bottom of the bottom of described the first groove and the second groove directly links together.
5. the pipe with bionical grooved surface according to claim 1, is characterized in that: the cross section of described the first groove and the second groove is all isosceles triangle.
6. the pipe with bionical grooved surface according to claim 1, is characterized in that: described the first groove is 0.1mm～0.2mm with respect to the height c of inwall.
7. the pipe with bionical grooved surface according to claim 1, is characterized in that: described the second groove is the half of the first groove with respect to the height c of inwall with respect to the height d of inwall.
8. the pipe with bionical grooved surface according to claim 1, is characterized in that: described the first groove equates with respect to the height c of inwall and the width a of the bottom of the first groove; Described the second groove equates with respect to the height d of inwall and the width b of the bottom of the second groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320875326.XU CN203686383U (en) | 2013-12-26 | 2013-12-26 | Circular pipe with bionic groove face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320875326.XU CN203686383U (en) | 2013-12-26 | 2013-12-26 | Circular pipe with bionic groove face |
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| Publication Number | Publication Date |
|---|---|
| CN203686383U true CN203686383U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320875326.XU Expired - Fee Related CN203686383U (en) | 2013-12-26 | 2013-12-26 | Circular pipe with bionic groove face |
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|---|---|
| CN (1) | CN203686383U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697243A (en) * | 2013-12-26 | 2014-04-02 | 华南理工大学 | Circular tube with bionic groove surface |
-
2013
- 2013-12-26 CN CN201320875326.XU patent/CN203686383U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697243A (en) * | 2013-12-26 | 2014-04-02 | 华南理工大学 | Circular tube with bionic groove surface |
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| 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: 20140702 Termination date: 20161226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |