CN107725285B - Wind turbine tail flow dissipation device - Google Patents
Wind turbine tail flow dissipation device Download PDFInfo
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- CN107725285B CN107725285B CN201711218027.8A CN201711218027A CN107725285B CN 107725285 B CN107725285 B CN 107725285B CN 201711218027 A CN201711218027 A CN 201711218027A CN 107725285 B CN107725285 B CN 107725285B
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- wake
- wind
- main body
- thin
- cylindrical main
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Classifications
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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
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/97—Reducing windage losses
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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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to a wind turbine wake dissipation device, which is fixed behind a cabin of a wind turbine through a fixed bracket, and comprises a thin-wall cylindrical main body, wherein the inside of the thin-wall cylindrical main body is uniformly divided into a plurality of square spaces and a plurality of irregular spaces through mutually orthogonal plate-type brackets, wake pipes are arranged in the spaces uniformly divided by the plate-type brackets, the wake pipes in the square spaces are cylindrical, the wake pipes in the irregular spaces are nearly cylindrical, a plurality of wind guide wings are arranged in the wake pipes, gaps are arranged between the wake pipes and the thin-wall cylindrical main body and between the wake pipes and the plate-type brackets, a conical guide cover is arranged at an air inlet of the gaps, and a wind collecting cover is arranged at one side of the air inlet of the thin-wall cylindrical main body and along the thin-wall cylindrical main body. According to the wake dissipation device, the influence of the turbulent wake on the downstream wind turbines is reduced, the arrangement interval between wind turbines of the wind power plant is shortened, and the land utilization rate of the wind power plant is improved.
Description
Technical Field
The invention relates to a wind turbine wake dissipation device, in particular to a cylindrical device capable of changing wake movement tracks and accelerating wake dissipation.
Background
In recent years, in wind farms where a large number of wind turbines are gathered, wind power plants often want to install as many wind turbines as possible in a limited range, and this time, how to arrange the wind turbines is needed to determine a suitable wind turbine pitch, and wake effect is a critical factor in determining the wind turbine pitch.
According to the aerodynamic theory, when one wind motor group is located in the wake of other wind turbines, the wake effect can reduce the efficiency of the wind turbines for capturing wind energy, the power generation power can be greatly influenced, and researches show that the structural fatigue of the wind turbines can also be influenced, so that the service life of the wind turbines is reduced. In certain areas, regardless of how the wind turbines are positioned, some wind turbines are inevitably affected by the wake of other wind turbines in the line. If there are other wind turbines in this line, the efficiency of capturing wind energy will be significantly reduced compared to wind turbines facing natural wind. After passing through the wind turbine, part of kinetic energy is converted into mechanical energy, and the mechanical energy is converted into electric energy, so that the wind speed is reduced. At the same time, the turbulence intensity of the wind is increased, and the wind turbine generator set in the downwind straight line direction is affected. The power generation capacity and economy of the wind farm are inseparable from the energy loss caused by wake effect, and the operation experience of the wind farm shows that when the wind turbine is completely in the wake, the power generation efficiency is only 60 to 70 percent of the original power generation efficiency.
At present, most researches focus on passive optimization of wind turbine wake flows, such as a wind power plant site selection method considering wake flows, a wind turbine arrangement optimization method considering wake flows and the like; the arrangement of wind turbines in a wind farm can only reasonably determine the distance between the wind turbines according to relevant standard specifications and combining the capacity and the topography of a unit, and no method or device for actively processing wake flows exists.
Disclosure of Invention
In order to solve the problems, the invention provides a wind turbine wake dissipation device and a method based on the windward wind turbine widely used at present, and the wake dissipation device and the method can shorten the dissipation distance of the wake by changing the motion track of the wake and accelerating the wake, reduce the influence on a downstream wind turbine and reduce the arrangement interval between wind turbines, thereby being a method and a device for effectively processing the wake of the wind turbine.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the invention relates to a wind turbine wake dissipation device, which is fixed behind a cabin of a wind turbine through a fixed support, wherein an air outlet cross section circle and an air inlet cross section circle of the dissipation device are positioned on the same horizontal line, and are positioned on the same central axis with the center of a blade of the wind turbine.
The invention further improves that: the wind guiding wing is curved, one side is an arc plane and is fixed on the inner wall of the tail flow pipe, the other side is a streamline curved surface, and the front bending degree of the wind guiding wing is larger than the rear bending degree.
The invention further improves that: four or three sides of the conical air guide sleeve are concave streamline curved surfaces.
The invention further improves that: the fixed support is cross, and two plate type supports on fixed support one side and air intake cross section circle center are together fixed, and the another side is riveted at the cabin rear.
The invention further improves that: the wind gathering cover is outward expansion and forms 45 degrees with the horizontal direction.
The beneficial effects of the invention are as follows: according to the wake dissipation device arranged at the tail of the wind turbine, wake formed by a disc of the blade of the wind turbine enters a wake pipe along a spiral motion track of the wake dissipation device, tip vortex and root vortex contained in the wake enter the wake pipe through a conical fairing, the wake is impacted by the fairing when passing through the conical fairing, the motion inertia in the tangential direction of the wake is weakened, when the wake flows through the wind guiding wing, the obstruction of the wind guiding wing reduces the section of the flow pipe, the inner surface curvature of the wind guiding wing is large, the airflow velocity of the inner surface of the wind guiding wing is increased, the outer surface is a circular arc plane and is fixed on the inner wall of the wake pipe, the wake velocity is improved, the streamline curved surface of the inner wall of the wake pipe is beneficial to the rapid discharge of the wake, the spiral motion track of the wake is changed and is horizontally moved, the tip vortex and root vortex area is reduced, and the airflow discharged backwards after the wake passes through the wake pipe in the whole cylinder body does not form a turbulent spiral wake when the device is not installed, and the wake is discharged backwardsThe wind speed at the central line of each wake flow pipe is steadily increased under the action of surrounding turbulence along the horizontal direction of linear motion until the wind speed value of free air flow is restored。
The invention provides a cylindrical wake flow dissipation device, which is used for reducing the influence of turbulent wake flow on a downstream wind turbine, so that the arrangement interval between wind turbines of a wind power plant is reduced, and the land utilization rate of the wind power plant is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of a fan structure with wake dissipating apparatus installed.
FIG. 3 is a schematic cross-sectional view of a wind-guiding wing.
Fig. 4 is a half cross-sectional view of a tail pipe.
Fig. 5 is a schematic structural view of the pod.
FIG. 6 is a schematic diagram of the operation of the wake-free dissipation device of the present invention.
Fig. 7 is a schematic diagram of the operation of the wake dissipating device of the present invention.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, which are only for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1-7, the invention is a wind turbine tail flow dissipating device, the dissipating device is fixed behind a nacelle 8 of a wind turbine through a fixing bracket 7, the fixing bracket 7 is cross-shaped, one surface of the fixing bracket 7 is fixed with two plate-shaped brackets 4 on the round circle of the cross section of an air inlet, the other surface is riveted behind the nacelle 8, the air outlet cross section circle of the dissipating device and the round circle of the cross section of the air inlet are positioned on the same horizontal line and the center of a blade of the wind turbine are positioned on the same central axis, the dissipating device comprises a thin-walled cylinder main body 1, the thin-walled cylinder main body 1 is a hollow cylinder, the inside of the thin-walled cylinder main body 1 is uniformly separated by a plurality of square spaces and a plurality of irregular spaces through mutually orthogonal plate-shaped brackets 4, that is, the inside space of the thin-walled cylinder main body is uniformly separated by the plate-shaped brackets 4 with the same amount in the horizontal and vertical directions, the middle part is square space, the part of the plate-type support is irregular space where the plate-type support is connected with the cylindrical main body, the wake tube 2 is arranged in the space evenly separated by the plate-type support 4, the wake tube 2 in the square space is cylindrical, the wake tube 2 in the irregular space is nearly cylindrical, the air inlet of the wake tube is circular or nearly circular formed by the inner wall of the cylinder, the air outlet of the wake tube is consistent with the shape and the size of the air inlet, the inner wall of the wake tube is smooth, a plurality of wind guide wings 3 are arranged in the wake tube 2, the whole wind guide wings 3 in the wake tube 2 are cylindrical or nearly cylindrical, the wind guide wings 3 are curved, one side is a circular arc plane and fixed on the inner wall of the wake tube 2, the other side is a streamline curved surface, the front bending degree of the wind guiding wing 3 is larger than the rear bending degree, a gap is formed between the wake pipe 2 and the thin-wall cylindrical main body 1, a gap is formed between the wake pipe 2 and the plate-type support 4, a conical guide cover 6 is installed at an air inlet of the gap, four sides or three sides of the conical guide cover 6 are concave streamline curved surfaces, a wind collecting cover 5 is arranged on one side of the air inlet of the thin-wall cylindrical main body 1 and along the thin-wall cylindrical main body 1, and the wind collecting cover 5 is outwards expanded at 45 degrees with the horizontal direction.
As shown in fig. 6, when no wake dissipating device is installed behind the nacelle 8, when the airflow passes through the wind wheel, a rotational torque with equal magnitude and opposite direction is applied to the airflow behind the wind wheel, and the reaction result of the counter torque causes the airflow behind the wind wheel to rotate against the wind wheel, so that the airflow behind the wind wheel receives forces in two directions, one force is in the same direction as the incoming flow direction, the other force is tangential to the incoming flow, the resultant force of the two forces is the primary force of the spiral wake as shown in the drawing, and if the downstream wind turbine is in the wake area, the input wind speed is lower than the input wind speed of the upstream wind turbine, so that the output power is reduced.
As shown in fig. 7, when the wind turbine is installed with the wake dissipating device, wake flows enter the wake pipe 2 along the spiral movement track of the wake flow dissipating device, tip vortex and root vortex contained in the wake flow enter the wake pipe 2 through the conical fairing 6, the wake flow collides with the fairing when passing through the conical fairing 6, the movement inertia in the tangential direction is weakened, when the wake flow passes through the wind guiding wing 3, the obstruction of the wind guiding wing 3 causes the section of the flow pipe to be reduced, the inner surface curvature of the wind guiding wing 3 is large, the airflow velocity on the upper surface of the wind guiding wing 3 is increased, the lower surface is a circular plane and is fixed on the inner wall of the wake pipe 2, the wake flow velocity is increased, the streamline curved surface of the inner wall of the wake pipe 2 is beneficial to the rapid discharge of the wake flow, the spiral movement track of the wake flow changes after passing through the wake pipe 2, the wake flow is horizontally moved, the tip vortex and vortex area is reduced, the wake flow discharged backwards after passing through the wake pipe 2 in the whole cylinder body does not form the turbulent spiral wake flow when not installed with the device, the wake flow is horizontally moved linearly, and the airflow is restored to the free wind velocity value at the center of the periphery of the wake flow velocity along the horizontal direction, and the free wind velocity is increased at the inner side of the wake flow velocity, and the free wind velocity is restored from the wind flow position at the center of the wind flow position。
According to the wake dissipation device disclosed by the invention, wake is combed, the movement track of the wake is changed, the length of a wake area is reduced, and dissipation of the wake is accelerated, so that the arrangement distance between wind turbines of a wind power plant is reduced, and wind power plants can arrange more wind turbines in the same range.
Claims (3)
1. Wind turbine wake dissipation device, which is fixed behind a nacelle (8) of a wind turbine by means of a fixing bracket (7), characterized in that: the device of the dissipation device comprises a thin-wall cylindrical main body (1), wherein the thin-wall cylindrical main body (1) is a cylinder with hollow inside, the inside of the thin-wall cylindrical main body (1) is uniformly divided into a plurality of square spaces and a plurality of irregular spaces through mutually orthogonal plate-type supports (4), a wake pipe (2) is arranged in the space uniformly divided by the plate-type supports (4), the wake pipe (2) in the square space is cylindrical, the wake pipe (2) in the irregular space is nearly cylindrical, a plurality of wind guide wings (3) are arranged in the wake pipe (2), a gap is arranged between the wake pipe (2) and the thin-wall cylindrical main body (1), a gap is arranged between the wake pipe (2) and the plate-type supports (4), a conical guide cover (6) is arranged at the air inlet of the gap, one side of the thin-wall cylindrical main body (1) is uniformly divided by the plate-type supports (4), the wake pipe (2) is arranged along the main body (1), the wake pipe (2) is bent to be a curve, the wind guide wings (3) are arranged on one side of the thin-wall cylindrical curved surface (3) and the other side is a curve, the wind guide wings (3) is fixed on the front side of the curved surface (3) of the thin-wall cylindrical main body (1), four or three sides of the conical air guide sleeve (6) are concave streamline curved surfaces.
2. A wind turbine tail flow dissipation device as recited in claim 1, wherein: the fixed support (7) is cross-shaped, one surface of the fixed support (7) is fixed with the two plate-shaped supports (4) on the round center of the section of the air inlet, and the other surface of the fixed support is riveted at the rear of the engine room (8).
3. A wind turbine tail flow dissipation device as recited in claim 1, wherein: the wind gathering cover (5) is outward expansion and forms 45 degrees with the horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218027.8A CN107725285B (en) | 2017-11-28 | 2017-11-28 | Wind turbine tail flow dissipation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218027.8A CN107725285B (en) | 2017-11-28 | 2017-11-28 | Wind turbine tail flow dissipation device |
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| Publication Number | Publication Date |
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| CN107725285A CN107725285A (en) | 2018-02-23 |
| CN107725285B true CN107725285B (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711218027.8A Active CN107725285B (en) | 2017-11-28 | 2017-11-28 | Wind turbine tail flow dissipation device |
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| CN (1) | CN107725285B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779828B (en) * | 2019-03-14 | 2023-10-13 | 沈阳永磁电机制造有限公司 | High-efficiency wind collecting cover suitable for energy-gathering microminiature wind turbine |
| CN113153636B (en) * | 2021-04-14 | 2022-11-22 | 中国科学院力学研究所 | Flow control device and method for promoting wake flow recovery of wind driven generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6935263B1 (en) * | 2004-06-07 | 2005-08-30 | The United States Of America As Represented By The Secretary Of The Navy | Wake absorber |
| JP2011007085A (en) * | 2009-06-24 | 2011-01-13 | Fuji Heavy Ind Ltd | Floating offshore wind turbine |
| CN102116250A (en) * | 2009-12-30 | 2011-07-06 | 中国科学院工程热物理研究所 | Wind turbine |
| CN102459872A (en) * | 2009-06-04 | 2012-05-16 | 弗洛设计风力涡轮机公司 | Nacelle configurations for a shrouded wind turbine |
| CN105020106A (en) * | 2015-08-14 | 2015-11-04 | 厦门大学 | Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7214029B2 (en) * | 2004-07-01 | 2007-05-08 | Richter Donald L | Laminar air turbine |
| GB2481461A (en) * | 2010-06-21 | 2011-12-28 | Vestas Wind Sys As | Control of a downstream wind turbine in a wind park by sensing the wake turbulence of an upstream turbine |
| WO2012129435A2 (en) * | 2011-03-22 | 2012-09-27 | Tufts University | Systems, devices and methods for improving efficiency of wind power generation systems |
| US9835138B2 (en) * | 2011-09-13 | 2017-12-05 | Vestas Wind Systems A/S | Method for improving large array wind park power performance through active wake manipulation reducing shadow effects |
| US20150300183A1 (en) * | 2014-04-16 | 2015-10-22 | Ogin, Inc. | Fluid Turbine With Turbine Shroud And Ejector Shroud Coupled With High Thrust-Coefficient Rotor |
| JP2017517681A (en) * | 2014-06-13 | 2017-06-29 | ジョイア アントニオ ラ | Rotating blade body for turbines using the Magnus effect, particularly turbines having a rotating shaft parallel to the direction of the motor fluid |
| US9926906B2 (en) * | 2016-04-29 | 2018-03-27 | Mansberger Aircraft Inc. | Thermodynamic wind turbine |
-
2017
- 2017-11-28 CN CN201711218027.8A patent/CN107725285B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6935263B1 (en) * | 2004-06-07 | 2005-08-30 | The United States Of America As Represented By The Secretary Of The Navy | Wake absorber |
| CN102459872A (en) * | 2009-06-04 | 2012-05-16 | 弗洛设计风力涡轮机公司 | Nacelle configurations for a shrouded wind turbine |
| JP2011007085A (en) * | 2009-06-24 | 2011-01-13 | Fuji Heavy Ind Ltd | Floating offshore wind turbine |
| CN102116250A (en) * | 2009-12-30 | 2011-07-06 | 中国科学院工程热物理研究所 | Wind turbine |
| CN105020106A (en) * | 2015-08-14 | 2015-11-04 | 厦门大学 | Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing |
Non-Patent Citations (1)
| Title |
|---|
| 水平轴风力机尾迹的测量与分析;胡丹梅;田杰;杜朝辉;;动力工程(第05期);全文 * |
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| CN107725285A (en) | 2018-02-23 |
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