本文關(guān)鍵詞：風(fēng)力發(fā)電機葉片優(yōu)化設(shè)計方法研究　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 風(fēng)力發(fā)電機 葉片 優(yōu)化設(shè)計 氣動系數(shù) 相對厚度變化 變槳距 遺傳算法

【摘要】：面對迫在眉睫的能源和環(huán)境危機,作為當(dāng)前可再生能源技術(shù)中,相對成熟并同時具備商業(yè)開發(fā)和規(guī)模發(fā)展的一種清潔能源—風(fēng)能,它的利用方式和發(fā)電技術(shù)的發(fā)展受到世界各國越來越多的關(guān)注。風(fēng)力發(fā)電機是風(fēng)能利用的核心,水平軸風(fēng)力發(fā)電機是風(fēng)力發(fā)電機主要類型之一。葉片是水平軸風(fēng)力發(fā)電機的關(guān)鍵部件,風(fēng)力發(fā)電機的風(fēng)能利用效率與葉片形狀密切相關(guān),所以葉片的設(shè)計與優(yōu)化是風(fēng)力發(fā)電機設(shè)計制造中的重要工作內(nèi)容。 論文分析了國內(nèi)外風(fēng)力發(fā)電機葉片研究現(xiàn)狀、風(fēng)力發(fā)電機葉片設(shè)計理論和方法以及葉片轉(zhuǎn)矩、風(fēng)能利用系數(shù)、受力系數(shù)等計算方法。論文根據(jù)葉素動量理論建立了風(fēng)力發(fā)電機葉片氣動計算模型,針對400KW風(fēng)力發(fā)電機葉片,使用Matlab語言編制了葉片氣動性能計算程序,計算得到葉片的效率值。綜合葉片翼型厚度變化影響和變槳距設(shè)計要求,提出了一種新的葉片優(yōu)化設(shè)計方法,使用Matlab工具基于葉素-動量理論開發(fā)的優(yōu)化設(shè)計程序,以提高風(fēng)力發(fā)電機葉片年平均風(fēng)能轉(zhuǎn)換效率為優(yōu)化設(shè)計目標(biāo),以翼型相對厚度和槳距角為設(shè)計變量,利用遺傳算法,對葉片形狀和尺寸進行多參數(shù)優(yōu)化設(shè)計。 論文提出的一種新的大型風(fēng)力發(fā)電機葉片設(shè)計方法,包含四個階段：第一階段是葉片翼型氣動系數(shù)的獲取,通過naca、Xfoil和AirfoilPrep三個軟件有機結(jié)合得到攻角區(qū)間在-180°～180°內(nèi)的翼型氣動系數(shù)；第二階段是葉片基本參數(shù)的設(shè)定,通過風(fēng)力發(fā)電機葉片設(shè)計理論計算得到風(fēng)力發(fā)電機的功率、風(fēng)輪直徑、葉尖速比、葉片數(shù)、實度等；第三階段是采用Wilson法得到初步設(shè)計的葉片,通過Matlab編寫葉片效率的計算方法程序,進行初始葉片截面弦長和扭角的計算,從而得到初始葉片的效率值；第四階段是得到優(yōu)化后的兩組葉片,基于Wilson方法設(shè)計結(jié)果,利用遺傳算法,在個體適應(yīng)度計算時考慮葉片沿展向的相對厚度的變化,得到優(yōu)化后的葉片參數(shù)；最后綜合考慮葉片厚度相對于槳距角發(fā)生變化的情況下,再對葉片進行優(yōu)化,得到進一步優(yōu)化的葉片參數(shù)。 仿真結(jié)果表明,在不同的風(fēng)速下,通過論文提出的優(yōu)化方法得到的葉片,比原有葉片的風(fēng)能轉(zhuǎn)換效率都有所增加,從而驗證了論文提出的優(yōu)化方法的有效性。 本文研究主要放在大攻角范圍下翼型氣動系數(shù)的獲取,基于葉片翼型相對厚度變化的優(yōu)化設(shè)計方法,進而提出了綜合考慮葉片翼型厚度相對于槳距角發(fā)生變化的情況下的優(yōu)化設(shè)計方法。
[Abstract]:Facing the imminent energy and environmental crisis, as the current renewable energy technology, relatively mature and has commercial development and scale development of a clean energy-wind energy. Its utilization mode and the development of power generation technology are paid more and more attention in the world. Wind turbine is the core of wind energy utilization. Horizontal axis wind turbine is one of the main types of wind turbine. Blade is the key component of horizontal axis wind turbine. The wind energy efficiency of wind turbine is closely related to the shape of blade. So the design and optimization of blade is an important part of wind turbine design and manufacture. This paper analyzes the research status of wind turbine blade at home and abroad, the design theory and method of wind turbine blade, blade torque and wind energy utilization coefficient. According to the theory of blade momentum, the aerodynamic calculation model of wind turbine blade is established, aiming at 400KW wind turbine blade. The calculation program of blade aerodynamic performance is compiled by using Matlab language, and the blade efficiency value is calculated. The influence of blade airfoil thickness variation and the design requirements of pitch of variable propeller are considered. In this paper, a new method of blade optimization design is proposed, and an optimal design program based on the theory of leaf element and momentum is developed by using Matlab tool. In order to improve the average annual wind energy conversion efficiency of wind turbine blade, the relative thickness of airfoil and pitch angle are taken as design variables, and the shape and size of blade are optimized by genetic algorithm. A new design method for large wind turbine blades is proposed in this paper, which consists of four stages: the first stage is to obtain aerodynamic coefficients of blade airfoil through naca. The aerodynamic coefficients of the airfoil in the angle of attack range of -180 擄~ 180 擄are obtained by the combination of Xfoil and AirfoilPrep software. The second stage is to set the basic parameters of the blade. The power of the wind turbine, the diameter of the wind turbine, the ratio of blade tip speed, the number of blades, the degree of reality and so on are calculated by the design theory of wind turbine blade. In the third stage, the primary design blade is obtained by Wilson method, and the initial blade section chord length and torsion angle are calculated by Matlab program. The efficiency value of the initial leaf was obtained. In the 4th stage, two groups of blades were obtained after optimization. Based on the design results of Wilson method and genetic algorithm, the relative thickness of blade along the span direction was considered in the calculation of individual fitness. The optimized blade parameters were obtained. Finally, considering the change of blade thickness relative to pitch angle, the blade parameters are optimized. The simulation results show that under different wind speeds, the wind energy conversion efficiency of the blade obtained by the optimization method proposed in this paper is higher than that of the original blade. Thus, the effectiveness of the proposed optimization method is verified. In this paper, the aerodynamic coefficients of the airfoil are obtained in the range of large angle of attack, and the optimization design method based on the relative thickness of the blade airfoil is presented. Furthermore, an optimal design method considering the change of blade airfoil thickness relative to the pitch angle of propeller is put forward.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM315

【參考文獻】

相關(guān)期刊論文 前10條

1 劉萬琨;;風(fēng)力發(fā)電與風(fēng)輪機優(yōu)化設(shè)計[J];東方電氣評論;2006年04期

2 申振華;于國亮;;翼型彎度對風(fēng)力機性能的影響[J];動力工程;2007年01期

3 韓中合;吳鐵軍;;基于遺傳算法的風(fēng)力機葉片優(yōu)化設(shè)計[J];動力工程;2008年06期

4 江澤慧;孫正軍;任海青;;先進生物質(zhì)復(fù)合材料在風(fēng)電葉片中的應(yīng)用[J];復(fù)合材料學(xué)報;2006年03期

5 屈圭;吳運新;;大功率風(fēng)力發(fā)電機葉片設(shè)計研究[J];廣東技術(shù)師范學(xué)院學(xué)報;2007年12期

6 李仁年;郭杏威;楊瑞;曠海洋;;基于Matlab的1.5MW風(fēng)力機葉片設(shè)計和優(yōu)化方法[J];甘肅科學(xué)學(xué)報;2012年04期

7 王旭東;王立存;李平;龔改民;;基于多學(xué)科的風(fēng)力機葉片形狀優(yōu)化設(shè)計研究[J];機械科學(xué)與技術(shù);2012年05期

8 陳進;王旭東;沈文忠;朱衛(wèi)軍;張石強;;風(fēng)力機葉片的形狀優(yōu)化設(shè)計[J];機械工程學(xué)報;2010年03期

9 程江濤;陳進;沈文忠;朱衛(wèi)軍;王旭東;;基于最大風(fēng)能利用系數(shù)的風(fēng)力機翼型設(shè)計[J];機械工程學(xué)報;2010年24期

10 代元軍;陸亦工;孫玉新;石寧;;基于MATLAB的Wilson方法的葉片優(yōu)化設(shè)計[J];機械制造;2011年07期

相關(guān)博士學(xué)位論文 前2條

1 宋輝;我國可再生能源供給的市場特征與激勵機制研究[D];中國礦業(yè)大學(xué);2011年

2 張石強;風(fēng)力機專用翼型及葉片關(guān)鍵設(shè)計理論研究[D];重慶大學(xué);2010年

，

本文編號：1401065