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CN101705900B - Novel blade used for ocean current power generation turbine - Google Patents

Novel blade used for ocean current power generation turbine Download PDF

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Publication number
CN101705900B
CN101705900B CN 200910154589 CN200910154589A CN101705900B CN 101705900 B CN101705900 B CN 101705900B CN 200910154589 CN200910154589 CN 200910154589 CN 200910154589 A CN200910154589 A CN 200910154589A CN 101705900 B CN101705900 B CN 101705900B
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blade
turbine
wing
root
high
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CN 200910154589
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Chinese (zh)
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CN101705900A (en )
Inventor
俞小伟
张旭
朱芳
李晓鹏
王立
董志勇
韩伟
颜效凡
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浙江工业大学
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GASES [GHG] EMISSION, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • Y02E10/22Conventional, e.g. with dams, turbines and waterwheels
    • Y02E10/223Turbines or waterwheels, e.g. details of the rotor

Abstract

The invention provides a novel blade used for an ocean current power generation turbine. The blade comprises a wing root close to a turbine rotor and a wing tip far away from the rotor; the transverse section of the blade is of an NACA series airfoil type; and the chord length of the blade continuously changes from big to small from the wing root to the wing tip, and the thickness of the blade gradually becomes smaller from the wing root to the wing tip. The blade has the advantages of small deadweight, and high turbine efficiency, and can make the turbine get high rotary speed just by low-flow rate sea water, and avoid the cavitation erosion when the turbine rotates at a high speed.

Description

一种新型的用于海流发电涡轮机的叶片 A new blade is used for ocean current turbines

技术领域 FIELD

[0001] 本发明涉及一种涡轮机的叶片,特别是一种用于海流发电涡轮机的叶片。 [0001] relates to a turbine blade according to the present invention, in particular for ocean current power generation turbine blades. 技术背景 technical background

[0002] 海流能是清洁、可再生能源,采用海流能技术发电,有利于改善能源结构,降低化石能源消耗带来的环境污染和气候变化问题。 [0002] ocean current energy is clean, renewable energy, power generation using ocean current energy technology, help to improve the energy structure, reduce environmental pollution and climate change caused by fossil energy consumption. 海流能是海洋能中最易获得、最具灵活性的一种能源。 Ocean current energy is the most readily available and most flexible source of energy. 海流发电涡轮机就是通过海水的流动,推动涡轮机转动,将海水的动能转化成为涡轮机的机械能。 Current flow through the power generating turbine is seawater, to promote the rotation of the turbine, the kinetic energy into the water turbine becomes mechanical energy. 其中,涡轮机的效率、空化性能和稳定性是影响发电机组性能的三项重要指标。 Wherein, efficiency, stability and performance of the air turbine is three important indicators of the impact generator performance.

[0003] 空化是流动液体特有的一种物理现象,它是因液体中局部压力低于该温度下的汽化压力时产生空泡的一种流体动力学现象,水力机械中的空化汽蚀会带来严重后果。 [0003] Cavitation is a specific flow of the liquid a physical phenomenon, which is produced when the cavitation of a fluid due to the fluid pressure below the partial vapor pressure at the temperature of dynamic phenomena, cavitation cavitation in hydraulic machinery It will bring serious consequences. 空化会导致流动不稳定,产生剧烈振动和噪声,降低其水力性能,使材料表面产生空蚀破坏,降低使用寿命。 Cavitating flow instability can cause excessive vibration and noise, reducing its hydraulic performance, the surface of the material to generate cavitation damage, reduced service life. 在涡轮机运行中,通常在空化程度还不足以对涡轮机工作特性产生可测影响前,空化就已经开始。 Before the operation of the turbine usually is not enough to produce measurable effect on the operating characteristics of the turbine degree of cavitation, cavitation has already begun. 由于水力机械中的水流是比较复杂的,空化现象可以出现在不同的部位及在不同条件下形成空化,在涡轮机转轮流道内及在其过流部件的局部表面上,往往会发生空化而后引起空蚀。 Since the hydraulic machinery flow is complicated, cavitation may occur at different locations and are formed under different conditions of cavitation in the turbine rpm rotation within the channel and on the local surface of the flow components, often cavitation occurs then causing cavitation. 轻微的只在叶片表面形成少量蚀点,严重的叶片空蚀区的金属材料被大量剥蚀,致使表面成蜂窝状,甚至有使叶片穿孔或掉边的现象,严重威胁着机组的安全运行。 Slightly formed only in a small amount of leaf surface pitting, serious material metal blade cavitation zone is a lot of erosion, resulting in the surface of a honeycomb, perforated or even the blade off the side of the phenomenon, a serious threat to the safe operation of the unit.

[0004] 现有的涡轮机叶片采用等弦长、等厚度的二维翼型剖面,这种二维叶片的自重大, 海水推动叶片转动消耗的能量大,致使涡轮机海水动能转化为机械能的效率低,且需要高流速的海水才能使涡轮机获得高转速,叶片容易发生空化空蚀。 [0004] The use of a conventional turbine blade chord length and the like, like the thickness of a two-dimensional aerofoil profile, such two-dimensional since the major blade, rotation of the blades push water consumed energy is large, resulting in turbine efficiency water kinetic energy into mechanical energy low , water and requires high flow rates to achieve high speed the turbine blade cavitation easily occurs.

发明内容 SUMMARY

[0005] 为克服现有技术的叶片自重大,涡轮机海水动能转化为机械能的效率低,需要高流速的海水才能使涡轮机获得高转速,叶片容易发生空化空蚀的缺点,本发明提出一种叶片自重小、涡轮机的效率高,不发生空化空蚀,只需低流速海水即可使涡轮机获得高转速的用于海流发电涡轮机的叶片。 [0005] In order to overcome the blade prior art self-important turbine water kinetic energy into mechanical energy inefficient, requiring high flow rates of water to the turbine to obtain a high speed, blade prone disadvantage cavitation, the present invention provides a It leaves a small weight, high efficiency of the turbine, cavitation does not occur, only a low water flow to the turbine blades for ocean current power generation to obtain a high rotational speed of the turbine.

[0006] 一种新型的用于海流发电涡轮机的叶片,所述的叶片包括靠近涡轮机转子的翼根和远离所述的转子的翼梢,所述的叶片的横剖面采用NACA系列翼型;其特征在于:所述的叶片的弦长沿叶片的翼根向翼梢由大到小连续变化,叶片的厚度自叶片的翼根向翼梢逐渐变薄。 [0006] A new blade for ocean current power generation turbine, the blade comprising a blade root near the tip of the turbine rotor and away from the rotor, the blade cross section using a series NACA airfoil; which characterized in that: the chord length of the blade along the blade tip to the blade root continuously changes from large to small, the thickness of the blade is gradually reduced from the blade root to the blade tip.

[0007] 进一步,所述的叶片的后缘呈前凹的1/4的椭圆曲线,所述的叶片的前缘笔直。 [0007] Further, the rear edge of the blade of the elliptical concave front curve 1/4, the leading edge of a straight blade.

[0008] 进一步,所述的叶片的翼梢与翼根的长度之比为1 : 3. [0008] Further, the ratio of the length of the wing root to the tip of the blade is 1: 3.

[0009] 本发明的构思是:将叶片自翼根向翼梢弦长逐渐变短、厚度逐渐变薄,缩小了叶片的体积、减轻了叶片自重,提高了涡轮机将海水动能转变为机械能的效率,即使海水流速较低,涡轮机也能获得高转速。 [0009] The concept of the present invention: the blade gradually increases from the blade root to the wing tip chord length is short, the thickness is gradually reduced, reducing the volume of the blade, reducing the weight of the blade, the turbine will increase the kinetic energy of water into mechanical energy efficiency , despite a relatively low flow rate of water, the turbine can be obtained a high speed. [0010] 叶片后缘沿翼根向翼梢的方向、按照1/4椭圆曲线渐缩,使得叶片的过流面积减小了一半以上,叶片的过流面积越小,则叶片更容易被超空化发生时的空穴完全包裹,因空化和空蚀发生的位置不一样,从而避免高转速下叶片表面被空蚀。 [0010] in the blade trailing edge of a wing root toward the tip, according to the fourth tapered elliptic curve, so that the flow area of ​​the blade is reduced by more than half, the smaller flow area of ​​the blade, over the blade more easily hole completely wrapped upon occurrence of cavitation, cavitation due to the location and occurrence of cavitation erosion is not the same, the blade surface is thereby avoiding cavitation at high speeds.

[0011] 本发明具有叶片自重小、涡轮机的效率高,只需低流速海水即可使涡轮机获得高转速的,且避免涡轮机在高转速时叶片发生空蚀。 [0011] The present invention has a blade weight, high efficiency turbine, only a low flow rate of seawater to the turbine to obtain a high speed, and to avoid the occurrence of cavitation the turbine blades at high speeds.

附图说明 BRIEF DESCRIPTION

[0012] 图1为本发明的立体示意图 [0012] FIG. 1 is a perspective schematic view of the present invention.

[0013] 图2为本发明的横剖面示意图 [0013] 2 cross-sectional schematic view of the present invention.

[0014] 图3为本发明的纵剖面示意图 [0014] FIG. 3 is a longitudinal sectional schematic view of the present invention.

[0015] 图4为采用实施例二得出海水流速与涡轮机转速的关系图 [0015] FIG 4 is a second embodiment using the water flow diagram obtained with the turbine speed

[0016] 图5为采用实施例二得出的涡轮机转速与空化数的关系图 [0016] FIG. 5 is a turbine speed and uses cavitation number derived according to the second embodiment of the relationship of FIG.

具体实施方式 detailed description

[0017] 实施例一 [0017] Example a

[0018] 参照图1-3 [0018] Referring to FIG 1-3

[0019] 一种新型的用于海流发电涡轮机的叶片,所述的叶片1包括靠近涡轮机转子的翼根11和远离所述的转子的翼梢12,所述的叶片1的横剖面采用NACA系列翼型;其特征在于:所述的叶片1的弦长沿叶片的翼根11向翼梢12逐渐变短,叶片1的厚度沿翼根向翼梢逐渐变薄。 [0019] A new blade for ocean current power generation turbine, the blade 1 comprises a blade-root near the turbine rotor 11 and away from the tip of the rotor 12, the cross section of the blade 1 using a series NACA the airfoil; wherein: the chord length of the blade along a blade root 11 to blade tip 12 becomes progressively shorter, the thickness of the blade 1 along the wing root to the wing tip is gradually reduced.

[0020] 所述的叶片1的前缘笔直13,所述的叶片1的后缘14为前凹的四分之一的椭圆曲线。 [0020] The leading edge of a straight blade 13, the blade trailing edge 14 of a quarter of the front recess of the elliptic curve.

[0021] 所述的叶片1的翼梢12与翼根11的长度之比为1 : 3. [0021] The ratio of the length of the tip blade 12 of the blade root 11 is 1: 3.

[0022] 本发明的构思是:将叶片1沿翼根11向翼梢12弦长15逐渐变短、厚度逐渐变薄, 缩小了叶片1的体积、减轻了叶片1自重,提高了涡轮机将海水动能转变为机械能的效率, 即使海水流速较低,涡轮机也能获得高转速。 [0022] The concept of the present invention are: 1 along the blade tip 12 blade root 11 to the chord length 15 is gradually shortened, the thickness is gradually reduced, reducing the volume of the blade 1, reducing the weight of the blade 1, the turbine will increase the water kinetic energy into mechanical energy efficiency, despite a relatively low flow rate of water, the turbine can be obtained a high speed.

[0023] 叶片1后缘14沿翼根11向翼梢12的方向、按照1/4椭圆曲线渐缩,使得叶片1 的过流面积减小了一半以上,叶片1的过流面积越小,则叶片1更容易被超空化发生时的空穴完全包裹,因空化和空蚀发生的位置不一样,从而避免高转速下叶片1表面被空蚀。 [0023] The rear edge of the blade 14 along a direction of the blade root 11 to the tip 12, according to the fourth tapered elliptic curve, so that the flow area through the vane 1 is reduced by more than half, the smaller flow area of ​​the blade 1, the blade 1 is easier to occur when a hole completely wrapped over cavitation, cavitation due to the location and occurrence of cavitation erosion is not the same, the surface of the blade 1 so as to avoid cavitation at high speeds.

[0024] 实施例二 [0024] Second Embodiment

[0025] 参照图4、5,结合实际情况,说明本实施例: [0025] Referring to FIGS. 4 and 5, the actual situation, the present embodiment described embodiment:

[0026] 以下以翼型弦长c为单位1,对本发明的具体实施方式作进一步的描述。 [0026] In the following unit of the airfoil chord length c is 1, a specific embodiment of the present invention will be further described.

[0027] 叶片的横剖面采用NACA4415翼型,最大弯度f是弦长的4%,最大弯度位置〜离前缘为弦长的40%,最大厚度d是弦长的15%。 [0027] The cross section of the blade airfoil NACA4415 employed, the maximum camber f 4% of the chord length, the maximum camber from the leading edge position of the ~ 40% of the chord length, d is the maximum thickness of 15% chord.

[0028] 叶片采用在纵剖面上翼梢与翼根的长度之比为1 : 3的椭圆翼型,翼梢长度 [0028] In use the blade length ratio longitudinal section and the wing root to tip 1: 3 elliptical airfoil, tip length

a约为0. 333,翼根长度b为1,前缘1为垂直直线,后缘渐变线2为四分之一椭圆曲线2 2 ^^ + ! = 1。 a is about 0.333, b is a length of the wing root, the leading edge of a vertical line, a trailing edge gradient line is a quarter elliptic curve 2 ^ ^ 2 + 2! = 1. 0.667 aa 0.667 aa

[0029] 试验表明,采用现有的等弦长、等厚度的二维翼型剖面叶片时,涡轮机将海水动能 [0029] Tests have indicated that like the conventional chord, like the two-dimensional cross-sectional thickness of the blade airfoil, the turbine the kinetic energy of the water

4转化为机械能的平均转化效率为37%。 4 is converted to mechanical energy conversion efficiency of average 37%. 采用本发明的叶片时,涡轮机将海水动能转化为机械能的最大转化效率可达56 %,平均转化效率为45 %。 When using the blade according to the present invention, the water turbine maximum kinetic energy into mechanical energy conversion efficiency of up to 56% and the average conversion efficiency of 45%.

[0030] 本说明书实施例所述的内容仅仅是对发明构思的实现形式的列举,本发明的保护范围不应当被视为仅限于实施例所陈述的具体形式,本发明的保护范围也及于本领域技术人员根据本发明构思所能够想到的等同技术手段。 [0030] The present embodiment described in the specification are merely concepts include the realization form of the invention, the scope of the present invention should not be regarded as limited to the embodiments specific forms set forth, the scope of the present invention and also to It means equivalents skilled in the art that the inventive concept can be contemplated.

Claims (2)

  1. 1. 一种新型的用于海流发电涡轮机的叶片,所述的叶片包括靠近涡轮机转子的翼根和远离所述的转子的翼梢,所述的叶片的横剖面采用NACA系列翼型;其特征在于:所述的叶片的弦长沿叶片的翼根向翼梢由大到小连续变化,叶片的厚度沿叶片的翼根向翼梢逐渐变薄;所述的叶片的后缘呈前凹的1/4的椭圆曲线,所述的叶片前缘笔直。 CLAIMS 1. A blade for a new ocean current power generation turbine, the blade comprising a blade root close to and away from the tip of the rotor of the turbine rotor, the blade cross section using a series NACA airfoil; wherein comprising: a root chord length of the blade along the blade to the tip continuously changes from large to small, the thickness of the blade is gradually reduced along the wing root to tip of the blade; the rear edge of the blade of the front concave 1/4 elliptic curve, a straight leading edge of the blade.
  2. 2.如权利要求1所述的一种新型的用于海流发电涡轮机的叶片,其特征在于:所述的叶片的翼梢与翼根的长度之比为1 : 3。 2. A new turbine blade for ocean current power generation according to claim 1, wherein: the ratio of the length of the wing root to the tip of the blade is 1: 3.
CN 200910154589 2009-11-13 2009-11-13 Novel blade used for ocean current power generation turbine CN101705900B (en)

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CN101300419A (en) 2005-10-17 2008-11-05 Lm玻璃纤维制品有限公司 Blade for a wind turbine rotor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101300419A (en) 2005-10-17 2008-11-05 Lm玻璃纤维制品有限公司 Blade for a wind turbine rotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张雅文等.轴流式水轮机叶片端面缝隙无汽蚀几何形状设计探讨.《节能技术》.1987,(第6期),6-9.

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