CN112539128B - Blade assembly for tidal current energy power generation and tidal current energy water turbine - Google Patents
Blade assembly for tidal current energy power generation and tidal current energy water turbine Download PDFInfo
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- CN112539128B CN112539128B CN202011235762.1A CN202011235762A CN112539128B CN 112539128 B CN112539128 B CN 112539128B CN 202011235762 A CN202011235762 A CN 202011235762A CN 112539128 B CN112539128 B CN 112539128B
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- tidal current
- current energy
- blade
- bottom plate
- side plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/121—Blades, their form or construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/126—Rotors for essentially axial flow, e.g. for propeller turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a blade assembly for tidal current energy power generation and a tidal current energy water turbine. Blade subassembly for trend energy power generation includes: the blade comprises a blade and a plurality of suppressors, wherein the suppressors are distributed along the length direction of the blade and comprise a bottom plate and two side plates, a plurality of grooves are formed on the bottom plate, the side plates are arranged on the corresponding side parts of the bottom plate, and the two side plates are oppositely and obliquely arranged; an inflow area is formed between one end parts of the two side plates, an outflow area is formed between the other end parts of the two side plates, the width of the inflow area is smaller than that of the outflow area, and the bottom plate is arranged on the surface of the blade. The hydrodynamic performance of the blade is optimized, and the generating efficiency of the tidal current energy water turbine is improved.
Description
Technical Field
The invention relates to the technical field of tidal current power generation, in particular to a blade assembly for tidal current energy power generation and a tidal current energy water turbine.
Background
The ocean tide energy is taken as a clean renewable energy source and has the characteristics of high energy density, rich resources, small influence on the environment and the like. In recent years, research investment and capital support of governments and research institutions of various countries and countries around the world on tidal current energy power generation technology are increased, tidal current power generation devices of various types and specifications are developed, and the tidal current energy power generation technology is rapidly developed in the world. The tidal current energy water turbine power generation device converts the kinetic energy of water into the mechanical energy of blades of the water turbine, and then the mechanical energy is finally converted into electric energy through the conversion device. In the actual working flow field of the tidal current energy water turbine, the flow speed and the flow direction of the tidal current are unstable, namely, the blades are in a mixed flow state of laminar flow and turbulent flow. Under the condition, the boundary layer of the front edge of the wing profile of the tidal current energy water turbine is in a laminar flow state, and the boundary layer begins to separate when flowing at a certain position away from the front edge, so that the phenomenon of transition from laminar flow to turbulent flow occurs, the hydrodynamic performance of the blade is reduced, and the generating efficiency is low. The invention aims to solve the technical problem of how to design a technology for improving the power generation efficiency of a tidal current energy water turbine.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the blade assembly for tidal current energy power generation and the tidal current energy water turbine are provided, the hydrodynamic performance of the blades is optimized, and the power generation efficiency of the tidal current energy water turbine is improved.
The technical scheme provided by the invention is that the blade assembly for tidal current energy power generation comprises: the blade comprises a blade and a plurality of suppressors, wherein the suppressors are distributed along the length direction of the blade and comprise a bottom plate and two side plates, a plurality of grooves are formed on the bottom plate, the side plates are arranged on the corresponding side parts of the bottom plate, and the two side plates are oppositely and obliquely arranged; an inflow area is formed between one end parts of the two side plates, an outflow area is formed between the other end parts of the two side plates, the width of the inflow area is smaller than that of the outflow area, and the bottom plate is arranged on the surface of the blade.
Further, the side plates are in a triangular plate structure, or the side plates are in a trapezoidal plate structure.
Further, along the direction from the flow inlet area to the flow outlet area, the height of the side plate is gradually increased.
Furthermore, a plurality of grooves are distributed on the bottom plate in an array mode.
Further, the side plates are arranged perpendicular to the bottom plate.
Further, the length of the side plate is L, and the height of the side plate close to the outflow area is H1, wherein L/H1=1.5 ~ 3.0.
Further, the thickness of the bottom plate is H2, the depth of the groove is H, H2= (1.1-1.5) × H.
Further, the area of the groove accounts for 80% or more of the total area of the bottom plate.
Further, the middle part and the blade tip of the blade are provided with the suppressors.
The invention also provides a tidal current energy water turbine which comprises a generator and the tidal current energy power generation blade assembly, wherein the tidal current energy power generation blade assembly is arranged on a hub of the generator.
Compared with the prior art, the invention has the advantages and positive effects that: the plurality of suppressors are arranged on the surface of the blade, and can guide the water flow on the surface of the popular blade through the side plates arranged on the two sides of the bottom plate, so that the flow in the direction of the water flow is reduced, and the hydrodynamic performance of the blade is improved; more importantly, because the surface of the blade is provided with water flow, the specific gravity of the water flow is much heavier than that of air, therefore, through the matching grooves on the bottom plate, when the water flow passes near the grooves, small vortexes are generated, due to the suction of these small vortices, water flow molecules near the surface of the bottom plate are attracted to the vortices (i.e., turbulent), and at this time, in addition to the tip vortex generated by the leading edge of the blade airfoil, it also generates an attractive force on fluid molecules flowing near the surface of the baseplate, thereby can promote wing point vortex and boundary layer bottom fluid's momentum and energy exchange, realize better flow separation suppression effect, the recess cooperation on two curb plates and the bottom plate can the surperficial flow separation of effectual suppression blade, improves the characteristic of twisted on blade surface, promotes the lift-drag ratio of wing section, improves the hydrodynamic performance of blade, finally improves the capacitation of hydraulic turbine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a tidal current energy water turbine of the invention;
FIG. 2 is a partial structural schematic view of a blade in an embodiment of the tidal current energy water turbine of the invention;
fig. 3 is a perspective view of a suppressor in an embodiment of the tidal current energy turbine of the present invention;
FIG. 4 is a front view of a suppressor for an embodiment of a tidal current energy turbine of the present invention;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
fig. 6 is a second perspective view of the suppressor in the tidal current energy turbine embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 6, the tidal current energy water turbine of the present embodiment generally includes a generator 100 and a base 300, the generator 100 is fixed on the base 300 through a pillar 301, and the base 300 is installed on the sea floor. And for the generator 100, a plurality of blade assemblies 200 are arranged thereon, and the blade assemblies 200 utilize tidal current to drive the generator 100 to operate so as to generate electricity.
Wherein the hydrodynamic properties of the blades are optimized to improve the power generation efficiency of the generator 100. The blade assembly 200, includes: the blade comprises a blade 1 and a plurality of suppressors 2, wherein the suppressors are distributed along the length direction of the blade and comprise a bottom plate 21 and two side plates 22, a plurality of grooves 211 are formed on the bottom plate, the side plates are arranged on the corresponding side parts of the bottom plate, and the two side plates are oppositely and obliquely arranged; an inflow area is formed between one end parts of the two side plates, an outflow area is formed between the other end parts of the two side plates, the width of the inflow area is smaller than that of the outflow area, and the bottom plate is arranged on the surface of the blade.
In particular, during actual use, as the water flows through the vanes, the water flow will be affected by the inhibitor. The method specifically comprises the following steps: two slopes that the inhibitor set up are arranged the curb plate can lead to the flow direction of rivers to, because rivers pass through two during between the curb plate, the space crescent and then play the effect that slows down to rivers to reduce the spanwise flow of rivers, the hydrodynamic property of effectual improvement blade. Meanwhile, for the water flow layer contacting with the blade, when the water flow flows through the bottom plate, under the influence of the groove, the water flow flowing through the groove generates a suction area with a plurality of vortexes, and then a plurality of small vortexes are formed in the water flow, and the vortexes formed by the groove enable the water flow layer far away from the bottom plate to be effectively attracted to achieve the turbulent flow effect, so that the momentum and energy exchange between the wing tip vortex and the fluid at the bottom of the boundary layer can be promoted, and the better flow separation inhibiting effect can be realized.
For the side plates, various structural forms can be adopted, such as: the side plates are in a triangular plate structure, or in a trapezoidal plate structure. And in order to better guide the water flow, the height of the side plate is gradually increased along the direction from the inflow area to the outflow area. Further, the length of the side plate is L, and the height of the side plate close to the outflow area is H1, wherein L/H1=1.5 ~ 3.0. Specifically, the relation between the overall length and the height of the suppressor also affects the energy of the "wing tip vortex", and the length-to-height ratio is usually preferably L/H1=1.5 to 3.0 because the energy of the "wing tip vortex" is slightly smaller and the additional resistance generated by the excessively large length-to-height ratio is larger, so that the requirement of generating the vortex can be satisfied and the resistance can be reduced. In addition, the side plates are perpendicular to the bottom plate, so that the flow guide effect of the side plates is improved.
Furthermore, a plurality of grooves are distributed on the bottom plate in an array mode. Specifically, a plurality of grooves can be uniformly arranged on the bottom plate in an array manner, so that the area of the bottom plate is utilized to the maximum extent. Wherein the area of the groove accounts for 80% or more of the total area of the bottom plate. And the recess may be a spherical recess (as shown in fig. 3) or a cylindrical recess (as shown in fig. 6). Preferably, a spherical groove is adopted, and the diameter d of the groove is preferably within the range of 2 mm-6 mm. Said grooves with a diameter d above 2mm favour the turbulence, whereas said grooves with a diameter d below 6mm do not impair or influence the original shape of the blade airfoil. In addition, the thickness of the bottom plate is H2, the depth of the groove is H, H2= (1.1-1.5) × H.
Further, the center portion and the tip of the blade are provided with the inhibitor. Specifically, the middle part and the tip of the blade are the parts mainly absorbing tidal current energy, and the root of the blade mainly plays a role in bearing load and connecting the blade with the hub of the generator 100.
Compared with the prior art, the invention has the advantages and positive effects that: the plurality of suppressors are arranged on the surface of the blade, and can guide the water flow on the surface of the popular blade through the side plates arranged on the two sides of the bottom plate, so that the flow in the direction of the water flow is reduced, and the hydrodynamic performance of the blade is improved; more importantly, because the surface of the blade is provided with water flow, the specific gravity of the water flow is much heavier than that of air, therefore, through the matching grooves on the bottom plate, when the water flow passes near the grooves, small vortexes are generated, due to the suction of these small vortices, water flow molecules near the surface of the bottom plate are attracted to the vortices (i.e., turbulent), and at this time, in addition to the tip vortex generated by the leading edge of the blade airfoil, it also generates an attractive force on fluid molecules flowing near the surface of the baseplate, thereby can promote wing point vortex and boundary layer bottom fluid's momentum and energy exchange, realize better flow separation suppression effect, the recess cooperation on two curb plates and the bottom plate can the surperficial flow separation of effectual suppression blade, improves the characteristic of twisted on blade surface, promotes the lift-drag ratio of wing section, improves the hydrodynamic performance of blade, finally improves the capacitation of hydraulic turbine.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A blade subassembly for trend can electricity generation characterized in that includes: the blade comprises a blade and a plurality of suppressors, wherein the suppressors are distributed along the length direction of the blade and comprise a bottom plate and two side plates, a plurality of grooves are formed on the bottom plate, the side plates are arranged on the corresponding side parts of the bottom plate, and the two side plates are oppositely and obliquely arranged; an inflow area is formed between one end parts of the two side plates, an outflow area is formed between the other end parts of the two side plates, the width of the inflow area is smaller than that of the outflow area, and the bottom plate is arranged on the surface of the blade.
2. The tidal current energy electric power generation blade assembly according to claim 1, wherein the side plates are in a triangular plate structure, or the side plates are in a trapezoidal plate structure.
3. The tidal current energy generation blade assembly of claim 2, wherein the height of the side plates gradually increases along the direction from the inflow area to the outflow area.
4. The blade assembly for tidal current energy power generation of claim 1, wherein a plurality of grooves are distributed on the bottom plate in an array manner.
5. The tidal current energy electric power generation blade assembly of claim 1, wherein the side plates are arranged perpendicular to the bottom plate.
6. The tidal current energy power generation blade assembly according to claim 1, wherein the length of the side plate is L, and the height of the side plate close to the outflow area is H1, wherein L/H1= 1.5-3.0.
7. The blade assembly for tidal current energy power generation according to claim 1, wherein the thickness of the bottom plate is H2, the depth of the groove is H, H2= (1.1-1.5) × H.
8. The tidal current energy generation blade assembly according to claim 1, wherein the area of the groove accounts for 80% or more of the total area of the bottom plate.
9. The tidal current energy electric power generation blade assembly according to any one of claims 1 to 8, wherein the center part and the tip of the blade are provided with the inhibitor.
10. A tidal current energy water turbine comprising a generator, characterized by further comprising the tidal current energy power generation blade assembly according to any one of claims 1 to 9, the tidal current energy power generation blade assembly being provided on a hub of the generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011235762.1A CN112539128B (en) | 2020-11-09 | 2020-11-09 | Blade assembly for tidal current energy power generation and tidal current energy water turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011235762.1A CN112539128B (en) | 2020-11-09 | 2020-11-09 | Blade assembly for tidal current energy power generation and tidal current energy water turbine |
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| Publication Number | Publication Date |
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| CN112539128A CN112539128A (en) | 2021-03-23 |
| CN112539128B true CN112539128B (en) | 2022-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011235762.1A Active CN112539128B (en) | 2020-11-09 | 2020-11-09 | Blade assembly for tidal current energy power generation and tidal current energy water turbine |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2466478A (en) * | 2008-12-02 | 2010-06-30 | Aerovortex Mills Ltd | Suction generation device |
| CN201407131Y (en) * | 2009-05-05 | 2010-02-17 | 李佳原 | Wind generator |
| CN201461226U (en) * | 2009-08-05 | 2010-05-12 | 中国科学院工程热物理研究所 | Vane |
| CN106050551B (en) * | 2016-05-25 | 2019-01-15 | 新疆金风科技股份有限公司 | The blade of vortex generating means and wind power generating set |
| KR102041056B1 (en) * | 2018-10-16 | 2019-11-06 | 한국해양대학교 산학협력단 | Impeller turbine rotor blade structure for energy loss reduction of frequency generator |
| CN110206680A (en) * | 2019-06-05 | 2019-09-06 | 上海电气风电集团有限公司 | A kind of vortex generator, fan blade and its manufacturing method |
| TWM588736U (en) * | 2019-08-09 | 2020-01-01 | 天力離岸風電科技股份有限公司 | Auxiliary device for horizontal axis wind turbine blade |
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