• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    generator comprises a plurality of groups of vortex modules, wherein each group of vortex modules comprises 5 two sheet units, and each sheet unit is composed of a first right-angle triangle, a second right-angle triangle and a sector. According to the vortex generator in a new shape provided by the present disclosure, the lift coefficient of an airfoil profile is increased, the stalling attack angle of the airfoil profile is delayed, and the aerodynamic performance of the airfoil profile is improved.
    公开号:NL2028951A
    申请号:NL2028951
    申请日:2021-08-11
    公开日:2021-10-06
    发明作者:Lv Menghao；Jia Yaya；Liu Qingkuan；Zhao Huaiyu；Chen Anjie；Gao Chao
    申请人:Univ Shijiazhuang Tiedao；
    IPC主号:
    专利说明:

    [01] [01] The present disclosure relates to the field of aerodynamics, and particularly relates to a vortex generator.BACKGROUND ART
    [02] [02] The wind turbine blade is composed of a series of different airfoil profiles, and the aerodynamic performance of the airfoil profiles directly affects the wind energy absorption capacity of the wind turbine blade, so that the power generation efficiency is affected. The aerodynamic performance of the airfoil can be improved, and the power generation efficiency of the wind turbine can be effectively improved. The vortex generator can improve the aerodynamic performance of the wind turbine blade airfoil profile to different degrees when being installed at the front edge of the airfoil profile, and due to the fact that the vortex generator is simple in structure and convenient to install, research and application are mostly conducted on the wind turbine airfoil profile in recent years. Most of existing vortex generators are triangular, but the triangular vortex generators have limited effects in the aspects of improving the lift coefficient of the airfoil profile and delaying the stall attack angle, and it is necessary to find a vortex generator in a new shape, wherein the wind energy absorption capacity and the power generation efficiency of blades are greatly improved.SUMMARY
    [03] [03] The present disclosure aims to provide a vortex generator to improve the lift coefficient of an airfoil profile and delay the stall attack angle of the airfoil profile.
    [04] [04] To achieve the purpose, the present disclosure provides a vortex generator. The vortex generator comprises:
    [05] [05] a plurality of groups of vortex modules, wherein each group of vortex modules comprises two sheet units, and each sheet unit is composed of a first right-angle triangle, a second right-angle triangle and a sector;
    [06] [06] the side length of a first right-angle side of the first right-angle triangle is H, and the side length of a second right-angle side of the first right-angle triangle is 3H;
    [07] [07] the side length of a first right-angle side of the second right-angle triangle is
    [08] [08] the length of the radius of the sector is 1.054H, the sector is tangent to the hypotenuse of the first right-angle triangle, the first radius of the sector and the hypotenuse of the second right-angle triangle are common sides, and the second radius of the sector is located on the extension line of the second right-angle side of the first right-angle triangle.
    [09] [09] Optionally, the vortex generator also comprises:
    [10] [10] a metal sheet, wherein the metal sheet is cut according to the size of the sheet unit, so that the bottom edge of the sheet unit and the metal sheet are integrally arranged, and an angle of 90° is formed between the bottom edge of the sheet unit and the metal sheet; the bottom edge of the sheet unit comprises the second right-angle side of the first right-angle triangle, the second right-angle side of the second right-angle triangle and the second radius of the sector; and the metal sheet is glued on an airfoil profile through glue.
    [11] [11] Optionally, the metal sheet is made of a strip-shaped metal sheet. 12] Optionally, every two adjacent groups of vortex modules are arranged in a mirror image manner.
    [13] [13] Optionally, the two sheet units in the vortex modules are arranged in a mirror image manner.
    [14] [14] Optionally, the vortex generator is installed at 20% of the front edge of the airfoil profile.
    [15] [15] Optionally, the distance between every two adjacent groups of vortex modules is 30 mm.
    [16] [16] Optionally, the installation angle of the sheet unit is 18°, and the installation angle is the included angle between the bottom edge of the sheet unit and the radial direction of the airfoil profile.
    [17] [17] According to the specific embodiment provided by the present disclosure, the present disclosure has the following technical effects:
    [18] [18] The present disclosure provides a vortex generator in a new shape. The vortex generator comprises a plurality of vortex modules, and each vortex module comprises two sheet units. Each sheet unit is composed of a first right triangle, a second right triangle and a sector. According to the vortex generator in a new shape provided by the present disclosure, the lift coefficient of an airfoil profile is increased, the stalling attack angle of the airfoil profile is put oft, and the aerodynamic performance of the airfoil profile is improved.BRIEF DESCRIPTION OF THE DRAWINGS
    [19] [19] To describe the technical scheme in the embodiments of the present disclosure or in the prior art more clearly, the following briefly introduces the attached figures required for describing the embodiments. Apparently, the attached figures in the following description show merely some embodiments of the present disclosure, and those skilled in the art may still derive other attached figures from these attached figures without creative efforts.
    [20] [20] FIG. 1 is a structural diagram of a sheet unit in the embodiment of the present disclosure;
    [21] [21] FIG. 2 is a top view of an installation included angle of a vortex generator on an airfoil profile in the embodiment of the present disclosure;
    [22] [22] FIG. 3 is a structural diagram of the vortex generator in the embodiment of the present disclosure;
    [23] [23] FIG. 4 is a curve graph of a lift coefficient of the airfoil profile of the vortex generator at a Reynolds number Re of 310° according to the embodiment of the present disclosure;
    [24] [24] FIG. 5 is a curve graph of a lift coefficient of the airfoil profile of the vortex generator at a Reynolds number Re of 6x 105 according to the embodiment of the present disclosure; and
    [25] [25] FIG. 6 is a curve graph of a lift coefficient of the airfoil profile of the vortex generator at a Reynolds number Re of 9x 10° according to the embodiment of the present disclosure.
    [26] [26] Reference signs: 1, first right-angle triangle; 2, second right-angle triangle; and 2, sector.DETAILED DESCRIPTION OF THE EMBODIMENTS
    [27] [27] The following clearly and completely describes the technical scheme in the embodiments of the present disclosure with reference to the attached figures in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.
    [28] [28] The present disclosure aims to provide a vortex generator to improve the lift coefficient of an airfoil profile and delay the stall attack angle of the airfoil profile.
    [29] [29] To make the foregoing objective, features and advantages of the present disclosure clearer and more comprehensible, the present disclosure is further described in detail below with reference to the attached figures and specific embodiments.
    [30] [30] FIG. 1 is a structural diagram of a vortex generator in the embodiment of the present disclosure. As shown in FIG. 1, the present disclosure provides a vortex generator. The vortex generator comprises:
    [31] [31] a plurality of groups of vortex modules, wherein each group of vortex modules comprises two sheet units, and each sheet unit is composed of a first right-angle triangle 1, a second right-angle triangle 2 and a sector 3; the side length of a first right-angle side of the first right-angle triangle 1 is H, and the side length of a second right-angle side of the first right-angle triangle 1 is 3H; the side length of a first right-angle side of the second right-angle triangle 2 is H, the first right-angle side of the second right-angle triangle 2 and the first right-angle side of the first right-angle triangle 1 are common sides, and the side length of the hypotenuse of the second right-angle triangle 2 is
    [32] [32] In the embodiment, the common sides indicate that the two sides coincide and are equal in length.
    [33] [33] In the embodiment, the vortex generator also comprises a metal sheet, wherein the metal sheet is cut according to the size of the sheet unit, so that the bottom edge of the sheet unit and the metal sheet are integrally arranged, and an angle of 90° is formed between the bottom edge of the sheet unit and the metal sheet.
    [34] [34] In the embodiment, the bottom edge of the sheet unit comprises the second 5 right-angle side of the first right-angle triangle 1, the second right-angle side of the second right-angle triangle 2 and the second radius of the sector 3; the metal sheet is glued on the airfoil profile through glue; and the metal sheet is made of a strip-shaped metal sheet.
    [35] [35] In the embodiment, every two adjacent groups of vortex modules are arranged inamirror image manner, and the two sheet units in the vortex modules are also arranged in a mirror image manner.
    [36] [36] Experiments prove that the effect of the vortex generator is better than that of a triangular vortex generator in the aspects of improving the lift coefficient of the airfoil profile and delaying the stall attack angle. The vortex generator in the present disclosure is a streamlined vortex generator.
    [37] [37] In the experiments, a commonly used NACA4418 airfoil profile in a wind turbine blade is selected as a research object, and the chord length c of the airfoil profile is equal to 300 mm. The experimental Reynolds number Re is 310°, 6x10° and 9x10, and the range of the attack angle is selected to be -4° to 22° according to the principle that the range of the experimental wind attack angle alpha can contain the attack angle state in the actual wind turbine blade operation process.
    [38] [38] In the embodiment, as shown in FIG. 3, the distance lambda between every two adjacent groups of vortex modules 1s 30 mm, and the distance s between two sheet units in the vortex modules is 5 mm.
    [40] [40] As shown in FIG. 4, FIG. 5 and FIG. 6, wind tunnel experiments are respectively carried out on airfoil profiles under three Reynolds numbers, from the figures, the lift coefficient CL of the airfoil profile is gradually increased along with the increase of the wind attack angle alpha, when a certain attack angle is reached, the lift coefficient Cy. of the airfoil profile begins to decrease, at the moment, the airfoil profile stalls, and the attack angle corresponding to the maximum lift coefficient of the airfoil profile is the stall attack angle. Compared with a smooth airfoil profile, the triangular vortex generator and the streamlined vortex generator can effectively improve the lift coefficient of the airfoil profile and delay the stall attack angle, the maximum lift coefficient of the streamlined vortex generator under three Reynolds numbers is larger than that of the triangular vortex generator airfoil profile, and the stall attack angle of the streamlined vortex generator is greater than that of the triangular vortex generator, so that the streamlined vortex generator has a better effect than the triangular vortex generator in the aspects of improving the lift coefficient of the airfoil profile and delaying the stall attack angle. The application of the streamlined vortex generator may be considered when the vortex generator is designed in practical engineering.
    [41] [41] All embodiments in this specification are described in a progressive manner. Each embodiment focuses on differences from other embodiments. For the part that is the same or similar between different embodiments, reference may be made between the embodiments.
    [42] [42] Several examples are used for illustration of the principles and implementation methods of the present disclosure. The description of the embodiments is used to help illustrate the core principles of the present disclosure. In addition, those skilled in the art can make various modifications in terms of specific embodiments and scope of application in accordance with the teachings of the present disclosure. In conclusion, the content of this specification shall not be construed as a limitation to the present disclosure.
    权利要求:
    Claims (8)
    [1]
    -7- Conclusions l. Vortex generator in a novel form comprising a plurality of groups of vortex modules, each group of vortex modules comprising two plate units, and wherein each plate unit is composed of a first right triangle, a second right triangle and a sector; wherein the side length of a first right-angled side of the first right-angled triangle is H, and the side length of a second right-angled side of the first right-angled triangle is 3H; where the side length of a first right side of the second right triangle is H, the first right side of the second right triangle and the first right side of the first right triangle are common sides, and the side length of the hypotenuse of the second right triangle is 1.054H ; wherein a second right side of the second right triangle is on the extended line of the second right side of the first right triangle; and wherein the length of the radius of the sector is 1.054H, the sector is tangent to the hypotenuse of the first right triangle, the first radius of the sector and the hypotenuse of the second right triangle are common sides, and the second radius of the sector is on the extended line of the second right-angled side of the first right-angled triangle.
    [2]
    The vortex generator of claim 1, further comprising: a metal plate, wherein the metal plate is cut according to the size of the plate unit so that the lower edge of the plate unit and the metal plate are integrally arranged, and an angle of 90° is formed between the lower edge of the plate unit and the metal plate; wherein the lower edge of the plate unit comprises the second right-angled side of the first right-angled triangle, the second right-angled side of the second right-angled triangle and the second radius of the sector; and wherein the metal plate is glued to a wing profile by means of glue.
    [3]
    The vortex generator of claim 2, wherein the metal plate is made of a
    -8- strip-shaped metal plate.
    [4]
    The vortex generator of claim 1, wherein any two adjacent groups of vortex modules are arranged in a mirror image manner.
    [5]
    The vortex generator of claim 4, wherein the two plate units in the vortex modules are arranged in a mirror image manner.
    [6]
    The vortex generator of claim 1, wherein the vortex generator is installed at 20% of the leading edge of the airfoil.
    [7]
    The vortex generator of claim 1, wherein the distance between any two adjacent groups of vortex modules is 30mm.
    [8]
    The vortex generator of claim 2, wherein the installation angle of the plate unit is 18°, and the installation angle is the included angle between the lower edge of the plate unit and the radial direction of the airfoil.
    类似技术:
    公开号 | 公开日 | 专利标题
    CN103089536B|2018-01-26|Aileron surface on the stall fence on wind turbine blade
    EP3597902B1|2021-12-01|Vortex generator for a wind turbine
    CN101598105B|2011-09-07|Device for controlling streaming flow separation on surface of blade
    Ragheb et al.2011|Multi-element airfoil configurations for wind turbines
    CN203593160U|2014-05-14|Wing structure
    CN102569468A|2012-07-11|Solar energy module with heat dissipation function and frame thereof
    NL2028951A|2021-10-06|Vortex generator
    CN103693187A|2014-04-02|Wing structure
    CN204140272U|2015-02-04|A kind of two half leaf formula low speed start rises resistance change formula vertical shaft fan wind wheel system
    CN104500334B|2017-05-17|Flapping wing wind turbine with flexible empennage
    CN103306907B|2015-09-02|A kind of heavy thickness aerofoil with blunt tail edge blade of large fan
    Ionescu et al.2015|Innovative solutions for portable wind turbines, used on ships
    Frunzulica et al.2014|Numerical investigations of passive flow control elements for vertical axis wind turbine
    Mauri et al.2014|Design and realisation of a high-performance active pitch-controlled H-Darrieus VAWT for urban installations
    CN204828047U|2015-12-02|Axial fan of engine cooling system
    CN201778951U|2011-03-30|Multi-stage variable pneumatic vane assembly
    CN108891569B|2020-02-07|Marine sail with variable airfoil profile
    CN205610542U|2016-09-28|Folding photovoltaic supporting structure of flat unipolar transportation
    RU2014103914A|2015-08-10|CYLINDER WIND TURBINE
    CN112491348B|2021-07-02|Photovoltaic module and photovoltaic tracking bracket system with drag reduction structure
    CN212360197U|2021-01-15|Horizontal axis wind turbine blade with stall angle delaying function
    CN111502907B|2022-03-01|Vortex generator, fan blade and wind driven generator comprising same
    Zubova et al.2015|Innovative Means of Increasing the Adjustment Ability of Wind Turbine
    CN103967722A|2014-08-06|Fixed-pitch variable-speed horizontal-axis wind turbine installation angle adjusting device for small-scale experiment
    CN112065651B|2021-12-14|Airfoil for wind turbine blade layer of wind generating set
    同族专利:
    公开号 | 公开日
    CN111894817A|2020-11-06|
    CN111894817B|2021-10-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DK174261B1|2000-09-29|2002-10-21|Bonus Energy As|Device for use in regulating air flow around a wind turbine blade|
    WO2010123400A1|2009-04-24|2010-10-28|МИХОВ, Александр Петрович|Wind energy installation|
    CN201437756U|2009-05-20|2010-04-14|宁波银风能源科技股份有限公司|Noise reduction leaf blade of wind power generator|
    JP4918664B2|2009-06-08|2012-04-18|李佳原|Wind power generator|
    GB201002281D0|2010-02-11|2010-03-31|Univ Sheffield|Apparatus and method for aerodynamic drag reduction|
    US8434723B2|2010-06-01|2013-05-07|Applied University Research, Inc.|Low drag asymmetric tetrahedral vortex generators|
    US9039381B2|2010-12-17|2015-05-26|Vestas Wind Systems A/S|Wind turbine blade and method for manufacturing a wind turbine blade with vortex generators|
    US8047784B2|2011-03-22|2011-11-01|General Electric Company|Lift device for rotor blade in wind turbine|
    DK2739528T3|2011-07-22|2019-12-09|Lm Wp Patent Holding As|Vortex generator arrangement for a carrier profile|
    DE102013210733B4|2013-06-10|2021-03-25|Senvion Gmbh|Rotor blade and vortex generator|
    US20150010407A1|2013-07-08|2015-01-08|Alonso O. Zamora Rodriguez|Reduced noise vortex generator for wind turbine blade|
    WO2015053768A1|2013-10-09|2015-04-16|Siemens Aktiengesellschaft|Hinged vortex generator for excess wind load reduction on wind turbine|
    US9422915B2|2014-05-08|2016-08-23|Siemens Aktiengesellschaft|Customizing a wind turbine for site-specific conditions|
    US10487798B2|2016-08-05|2019-11-26|General Electric Company|System and method for locating airflow modifiers for installation on a wind turbine rotor blade|
    EP3330614B1|2016-11-30|2019-10-02|Ansaldo Energia Switzerland AG|Vortex generating device|
    CN106704092A|2017-01-25|2017-05-24|北京博比风电科技有限公司|Synergistic spoiler blade|
    US10446373B2|2017-03-17|2019-10-15|Cu Aerospace, Llc|Cyclotronic plasma actuator with arc-magnet for active flow control|
    CN109386424A|2017-08-10|2019-02-26|上海电气风电集团有限公司|Vortex generator, pneumatic equipment bladess and its installation method with vortex generator|
    CN107972850B|2017-11-06|2019-12-20|中国航天空气动力技术研究院|Passive heat and drag reduction device and method for high-speed streaming boundary layer|
    CN108266312A|2018-01-16|2018-07-10|马可颖|A kind of wind energy conversion system vortex generator regulating mechanism|
    CN208842613U|2018-09-03|2019-05-10|中国科学院工程热物理研究所|A kind of adjustable vortex generating means|
    CN110206680A|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|
    CN110450942A|2019-06-27|2019-11-15|南京航空航天大学|It is a kind of for fuselage drag reduction and delay air-flow separate vortex generator|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN202010798653.4A|CN111894817B|2020-08-11|2020-08-11|Vortex generator|
    [返回顶部]