带缝翼多段翼型气动特性的实验研究_惠增宏
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尾缘襟翼长度对风力机翼型气动性能的影响韩中合;贾亚雷;李恒凡;朱霄繤;董帅【摘要】针对尾缘襟翼长度对风力机翼型气动性能的影响,分别以 S809翼型与DU 翼型为研究对象,设计了6种襟翼长度的襟翼模型,襟翼向翼型压力面偏转角为10°,襟翼与翼型主体之间为均匀1 mm 间隙,利用 AUTOCAD对各襟翼长度模型进行几何建模。
采用计算流体力学软件 Fluent 14.0对各襟翼模型进行不同攻角下的气动性能计算,对翼型边界附近流场及压力系数等进行了分析比较。
结果表明:尾缘襟翼长度对翼型的气动性能有较大的影响,襟翼长度不仅对襟翼附近的流场产生影响,对整个翼型的流场都有较大影响;带襟翼模型升力系数比无襟翼模型大大提高,且在一定攻角范围内随着襟翼长度增加,升力系数逐渐增大;带襟翼模型阻力系数比无襟翼模型翼型大,且在一定攻角范围内随襟翼长度增大阻力系数也增大;带襟翼模型升阻比在一定范围内比无襟翼模型大。
%The goal of the study was to investigate the effect of trailing edge flaps length on aerodynamics of wind turbine airfoil ,airfoil S809 and DU series airfoil were selected as research objects,and six kinds of flap length airfoil model were designed,have the same chord length of 1 000 mm,and the same deflect angle of 10°,the gap between the flap and the main airfoil body was optimized to make the width of gap as even 1 mm.The grids near the trailing edge are refined,and the grid independence is verified through the comparison of the calculated results with grid scales three,which a 148 000 grid model was selected for further calculation.The k-ωtwo equation turbulence model for commercial software Fluent was used here to calculate the aer-odynamics of the flap models at different attackangles,the streamline,pressure contour and pressure coefficient near border of airfoil were analyzed and compared.The result shows that the flaps length of airfoil with trailing edge flaps has great effect on the aerodynamic performance of the airfoil,not only the streamline near the flap is influenced but also the whole streamline near the airfoil are influenced.The lift coefficient of airfoil with flap is bigger than that of airfoil without flap,and the lift coefficient increases with the increasing of flap length.The drag coefficient of flap model is also bigger than that of airfoil without flap,and the drag coefficient of flap model also increases with the increasing of angle of attack.The lift to drag ratio is bigger than that of airfoil without flap at some range of angles of attack.【期刊名称】《空气动力学学报》【年(卷),期】2015(000)006【总页数】8页(P835-842)【关键词】风力机翼型;分离式尾缘襟翼;计算流体力学;升阻比【作者】韩中合;贾亚雷;李恒凡;朱霄繤;董帅【作者单位】华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定 071003;华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003; 河北软件职业技术学院,河北保定 071000;华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定 071003;华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定 071003;华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定 071003【正文语种】中文【中图分类】V211.41;V211.3近年来,风力发电得到迅速发展。
翼型多目标气动优化设计方法王一伟钟星立杜特专(北京大学力学与工程科学系,北京 100871)摘要本文将数值优化软件modeFRONTIER同计算流体力学(CFD)软件相结合,对NACA0012翼型的气动性能进行优化。
计算采用N-S方程作为主控方程以计算翼型气动性能,分别采用多目标遗传算法(MOGA)和多目标模拟退火算法(MOSA)作为翼型的气动性能优化算法。
计算结果表明,优化后的翼型相对于优化前的翼型的气动性能有很大提高(升阻比增幅可达182%)。
关键字气动优化设计多目标NS方程遗传算法模拟退火算法Abstract: The combination of the optimization software, modeFRONTIER, and the commercial CFD software is used to optimize the aerodynamic functions of the airfoil, NACA0012.The NS equations are adopted for calculating the airfoil aerodynamic properties (Cl, Cd and etc). Two kinds of optimization algorithm, the Multi-Object Genetic Algorithm(MOGA) and the Multi-Object Simulated Annealing(MOSA), are used in the optimization process respectively. The optimized airfoils show remarkable improvement of its aerodynamic functions (The ratio of lift to drag increases up to 282%) relative to its original one.Key words Aerodynamic Optimization Design, NS Equation, Genetic Algorithm, Simulated Annealing一、研究背景翼型的气动力设计是现代飞机设计的核心技术。
前缘缝翼对风电叶片翼型气动性能影响的研究王晓宇许炳坤白浩江贾飞(中国大唐集团科学技术研究院有限公司西北电力试验研究院)摘要:前缘缝翼作为叶片提升气动性能的部件,在减少叶片表面的流动分离、提高升力比方面发挥着重要作用。
本文采用CFD数值模拟的方法对S830翼型添加前缘缝翼前后进行研究,得结论如下:添加前缘缝翼,S830翼型的升力系数与阻力系数均增加,升力系数增加的更明显,最大增幅为8.62%;随着攻角的增加,S830翼型的流动分离区逐渐增加;添加前缘缝翼可有效控制S830翼型的流动分离;缝翼的存在增大了S830压力面压力的同时减小了吸力面的压力,从而使得翼型的升力增加。
关键词:风电机组;翼型;气动性能;前缘缝翼中图分类号:TK83文章编号:1006-8155-(2022)04-0022-04文献标志码:A DOI:10.16492/j.fjjs.2022.04.0004Influence of Leading Edge Slats on Aerodynamic Performance of Wind Turbine Blade AirfoilXiao-yu Wang Bing-kun Xu Hao-jiang Bai Fei Jia(Northwest Electric Power Test and Research Institute of China Datang Group Science and TechnologyResearch Institute Co.,Ltd.)Abstract:The leading edge slat,as a component of improving the aerodynamic performance of the blade,plays an important role in reducing the flow separation on the blade surface and improving the lift ratio.In this paper,the CFD numerical simulation method is used to study the S830airfoil before and after adding the leading edge slat.The conclusions are as follows:the lift coefficient and drag coefficient of S830airfoil increase with adding the leading edge slat,and the lift coefficient increases more obviously,which the maximum increase of8.62%;The flow separation zone of S830airfoil increases gradually with the increase of attack angle.The leading-edge slats effectively control the flow separation of S830airfoil which also increases the pressure of S830pressure surface and reduces the pressure of suction surface,so as to increase the lift of airfoil.Keywords:Wind Turbine;Airfoil;Aerodynamic Performance;Leading Edge Slat0引言风电机组在实际运行过程中,叶片的气动性能是影响风电机组风能捕获与稳定运行的重要因素[1]。
前缘缝翼对翼型S809气动特性的影响作者:郑文妞蒋笑王海鹏涂苏楼王生涛来源:《科技创新导报》2019年第04期摘 ; 要:控制风力机翼型的流动分离,可以提升翼型的气动特性。
本文采用数值模拟方法研究了前缘缝翼对风力机专用翼型S809气动特性的影响。
分析了加装前缘缝翼对翼型S809升、阻力系数和压力系数的影响,并揭示了对翼型S809边界层控制的机理。
研究结果表明,前缘缝翼可以有效地提升翼型的气动特性,增大升力系数,推迟翼型边界层的流动分离。
关键词:前缘缝翼 ;翼型S809 ;气动特性 ;流动分离中图分类号:TK83 ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;文献标识码:A ; ; ; ; ; ; ; ; ; ; ; ;文章编号:1674-098X(2019)02(a)-0017-03由于粘性摩擦力和逆压梯度的影响[1],导致边界层存在着流动分离。
流动分离和动态失速会导致风力机叶片疲劳载荷增加,从而降低风力机的整体效率。
因此,通过控制边界层的流动分离和延缓动态失速是可以改善风力机的气动性能的。
边界层流动分离控制技术在许多领域也得到了广泛的研究。
同时边界层流动控制技术也是风能研究的热点问题。
边界层流动分离控制技术可分为被动控制技术和主动控制技术[2]。
这些技术主要是通过增强边界层流动的动能来抑制或延缓流动分离现象。
被动控制技术是指一种简单有效的不需要外加功率的方法。
例如,Gurney襟翼可以控制边界层的压力梯度[3];涡流发生器可以增加边界层的动能[4]。
前缘缝翼是一种边界层流动分离控制技术,可实现被动控制技术或主动控制技术。
Pechlivanoglou等[5]研究了一种固定辅助前缘翼型来控制风力机叶片根部流动分离。
Elhadidi等[6]设计了主动板条提高翼型升力系数,延缓了流动分离。
该活动板条由旋转叶片组成,可关闭、完全打开和间歇打开。
Yavuz等[7]采用数值方法和实验方法研究了板条翼型布置对风力机气动性能的影响。
多段翼型流场分析CFD课程设计院系:专业:班级:学号:姓名:指导老师:目录第一章绪论 (3)1.1 ANSYS软件介绍 (3)1.2主要内容 (3)第二章模型建立 (4)2.1 ICEM建立模型及导出 (4)2.2 划分网格 (5)第三章 Fluent计算 (7)3.1 设置参数计算 (7)第四章 FLUENT计算结果及处理 (10)摘要此次课程设计是利用ANSYS软件中的ICEM和Fluent求解器计算不同迎角下,多段翼型的升力系数,阻力系数,力矩系数以及各个状态下的流场分布情况,根据题目要求翼型选择NACA0012为对称翼型,并带有前缘襟翼以及简单襟翼,计算结束后,利用tecplot软件绘制Cy-α,Cy-Cx,Mz-Cy曲线,得出Cy0,最大升阻比等气动力特征参数。
关键词ICEMFluenttecplot第一章绪论1.1 ANSYS软件介绍ANSYS软件是融结构、流体、电场、磁场、声场分析于一体的大型通用有限元分析软件,是一个多用途的有限元法计算机设计程序,可以用来求解结构、流体、电力、电磁场及碰撞等问题。
由世界上最大的有限元分析软件公司之一的美国ANSYS开发,它能与多数CAD软件接口,实现数据的共享和交换,如Pro/Engineer,NASTRAN,Alogor,I-DEAS, AutoCAD等,是现代产品设计中的高级CAD工具之一。
在此次的课题中,主要用到其中的ICEM及Fluent部分。
1.2 主要内容本次课程设计的主要内容就是通过CATIA建立多端翼型几何模型,通过fluent解算器进行有限元分析,从而得到该组合体的一些相关的气动数据。
此次课程设计的重点在于模型的建立,通过CATIA建立基础的模型,然后导入到ANSYS.ICEM中进行模型的处理以及网格包括壳网格、体网格及附面层网格的划分。
完成之后导入到fluent解算器设置属性,相关参数等,然后进行计算不同迎角下的多段翼型的相关气动参数及压力云图分布情况。
前缘缝翼内型的气动设计研究邓一菊;廖振荣;段卓毅【摘要】Five different three-elements airfoils which contain slat,fix foil and flap were analyzed.The only difference of those three-elements airfoils is the shape of the slat coves,which are faired to five shape, and the cusps are changed with the fairing ing the RANS simulation of the in house CFD tool“CCFD-MB”,the relative aerodynamic characters of the coves,such as the Reynolds effects,the stall behav-iors,the lift and the drag coefficients,were analyzed.Some of the similar researches done by Boeing and DLR were also mentioned in the document as reference work.The paper indicates some beneficial results:some kinds of the slat coves may lead to negative Reynolds effects;some kinds of cove fairings provide better aero efficiency and potential noise reduction tendency;the normal slat coves wildly adopted in industry design are not the best choices from the point of aerodynamic,yet the aerodynamic characteristic are acceptable. Some suggestions on the choice of slat coves were given according to the consideration of aerodynamic and structure.%对5种不同缝翼内型的“前缘缝翼+固定翼+后缘襟翼”三段翼型进行了分析。
缝道流动的脉动参数对多段翼型升力特性的影响高永卫;朱奇亮;罗凯【摘要】The dynamic parameters of gap flow of a multi-element airfoil have significant effect on its lift characteristics. Using wind tunnel experiments, the authors compared the changes of lift coefficients of a multi-element airfoil (GAW-1) under conditions of acoustic excitationon/off. The experiments were conducted in NF-3 wind tunnel. The sound pressure level (SPL) of internal acoustic excitation was 60dB. The results showed that the lift coefficients of the airfoil were reduced when disturbance were appended. The most decrement of lift coefficient is -1. 8%. This paper confirms that the designers should study the dynamic characteristics of flow near the gap. It should be noticed that the sources of error in experiment data analysis should include scale and quality of test model and the back ground sound pressure level of the wind tunnel.%采用风洞实验的方法,在不停风且固定迎角和几何构型的情况下,通过对比有、无人为脉动压力扰动时多段翼型升力特性的变化,证明多段翼型缝道流动的脉动参数(包括脉动速度和脉动压力)对其升力特性有着不可忽视的影响.人为扰动源为模型表面埋设的有源式蜂鸣器.蜂鸣器出口20mm处的声压级约为60dB.实验表明,在研究范围内,弱声学扰动可使翼型的升力系数降低.升力系数的减少量随扰动的位置、频率变化而变化,最大减少量为1.8%.提出在多段翼型的实验评估工作中需要注意风洞本底噪声、模型尺度、加工质量对缝道脉动压力和脉动速度等参数的影响以及相应升力特性的变化.【期刊名称】《实验流体力学》【年(卷),期】2012(026)006【总页数】4页(P15-18)【关键词】多段翼型;升力特性;风洞实验;缝道流动;脉动参数【作者】高永卫;朱奇亮;罗凯【作者单位】西北工业大学翼型研究中心111#,西安710072;西北工业大学翼型研究中心111#,西安710072;西北工业大学翼型研究中心111#,西安710072【正文语种】中文【中图分类】V211.70 引言增升装置设计是现代大型飞机提高起飞重量、缩短起降滑跑距离、增强机场适应性的关键技术[1]。
民用飞机前缘缝翼气动力特性SCCH试验研究巴玉龙;张召明【摘要】针对民用飞机增升装置对机翼气动力特性的影响,在南京航空航天大学NH-2低速风洞开展了某型号客机等弦长后掠半模(Swept constant chord half-model,SCCH)增升装置测力风洞试验研究.试验来流马赫数为0.2,基于机翼弦长的试验雷诺数为1.85×106.通过试验结果,重点分析了前缘缝翼的偏角、缝道宽度及缝道搭接量对机翼增升装置增升效率的影响,得到了起飞构型和着陆构型缝翼偏角及缝道的最佳组合参数.试验研究发现,缝翼偏角从18°增加到24°时,失速迎角和最大升力系数都增大,缝翼偏角从25°增加到31°时,失速迎角增大,最大升力系数没有明显的变化.起飞构型前缘缝翼最佳缝道宽度为1.5%~2.0%,最佳缝道搭接量为1.0%左右;着陆构型缝翼最佳缝道宽度为2.0%~2.5%,最佳缝道搭接量为-1.0%~0%.最佳缝道宽度随缝翼偏角的增加呈现增大趋势.%Focusing the influence of high-lift configuration of an airplane on wing aerodynamic characteristics,an experiment is conducted in NH-2 low-speed wind tunnel over a swept constant chord half-model (SCCH)high-lift configuration of a civil aircraft.In this experiment,the Mach number is 0.2 and the Reynolds number is 1.85×106.The effect of salt deployment angle,gap and over-lap on efficiency of high-lift configuration is investigated.Based on the test results,best slat parameters of this model are obtained for both take-off and landing configurations.The results show that both the stall angle of at-tack and the maximum lift coefficient increase with the slat deployment angle increasing from 18°to 24°, and only the stall angle of attack increases while the maximum lift coefficient does not change obviouslywhen the angle increasing from 25°to 31°.The best slat gap width is from 1.5% to 2.0% for take-off configuration,while 2.0% to 2.5% for landing configuration.The best over-lap is around 1.0% for take-off configuration,while -1 .0% to 0% for landing configuration.The best slat gap width presents increasing trend with the increase of the slat deployment angle.【期刊名称】《南京航空航天大学学报》【年(卷),期】2017(049)001【总页数】6页(P90-95)【关键词】民用飞机;增升装置;前缘缝翼;风洞试验;升力系数【作者】巴玉龙;张召明【作者单位】中国商用飞机有限责任公司上海飞机设计研究院,上海,201210;南京航空航天大学航空宇航学院,南京,210016【正文语种】中文【中图分类】V211.3飞机机翼的气动力设计,除了需要考虑高速巡航性能外,还需要在低速起降构型下,尽可能降低起飞和着陆速度,缩短滑跑距离,以最小的巡航性能损失来实现优秀的场域性能。
前缘缝翼尾缘喷流对多段翼流场的影响研究杨茵;陈迎春;李栋【摘要】为了研究前缘缝翼尾缘剪切层对多段翼气动性能的影响,通过在前缘缝翼尾缘添加喷流的方式来改变缝翼尾缘处的剪切层.选取不同的喷流流量和流速等参数,利用CFD手段研究了喷流对缝道的速度分布以及多段翼各个翼面气动力的影响.多段翼二维非定常流场由有限体积法求解的二维非定常雷诺平均Navier-Stokes 方程得到.分析结果得到;前缘缝翼尾缘添加喷流后对多段翼各个翼面压力分布和最大升力系数均有较大影响,其中,主翼最大升力系数、总的最大升力系数、前缘缝翼和后缘襟翼升力系数随着喷流动量系数增加而增加.%Effect of jet applied to the leading edge slat on the flowfield for multi-element airfoils were investigated to improve the high-lift aerodynamic performance of multi-element airfoils.The influences of key parameters, such as the jet flow rate and the speed of jet on the leading edge slat were studied.CFD method was adopted to analyze the effect of jet on the aerodynamic performance and the shear layer development behind the gap between slat and main element.Two dimensional unsteady Reynolds-averaged Navier-Stokes equations was solved by finite volume method to obtain two dimensional unsteady flowfield of multi-element airfoils.The results indicated that the slat trailing edge jet flow has significant effect on the pressure coefficient of each section of the multi-element airfoils and the maximum lift coefficient simultaneously.The maximum lift coefficient, the total maximum lift coefficient of main element, and the lift coefficients of slat and flap would increase with the jet momentum coefficient increases.【期刊名称】《空气动力学学报》【年(卷),期】2017(035)002【总页数】9页(P220-228)【关键词】前缘缝翼;多段翼;喷流;最大升力系数;缝道【作者】杨茵;陈迎春;李栋【作者单位】西北工业大学航空学院流体系, 陕西西安 710072;中国商用飞机有限公司上海飞机设计研究院, 上海 201102;西北工业大学航空学院流体系, 陕西西安 710072【正文语种】中文【中图分类】V211.3飞机在起飞和降落时,需要尽量降低飞行速度和缩短滑跑距离,因此需要具有较大的升力系数。