亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        PREFACE

        2016-02-12 01:45:44WangTongguang

        ?

        PREFACE

        In recent decades,global warming has worsened owing to the reckless use of fossil fuels.Consequently,as an alternative to fossil fuels,new renewable energy has drawed increasing increased attention and demand across the world.Among new renewables,wind energy,as a clean,sustainable and inexhaustible source of energy,has gained the fastest growth of renewable energy utilization.China has identified wind power as a key growth component of the country's economy.The performance of the Chinese wind power market surprised even optimistic analysts.By the end of 2015,the total installed wind power capacity amounted to 114.6 GW,23.2 GW of which was installed in 2015,leading wind application in the world.It is highly likely that China may reach total installed capacity of 250 GW by 2020.The development of wind energy in China,in terms of scale and rhythm,is absolutely unparalleled in the world.

        Wind turbines operate at all times in an extremely complex and unsteady flow due to stochastic wind speed and wind direction.Obviously,aerodynamic loads must be well understood before the structural response can be accurately determined.Moreover,the unsteady aerodynamic forces are always coupled with the wind turbine structure,resulting in complicated dynamic structural responses.Wind turbine failures,reduced machine life,and increased operating maintenance are all directly linked to the unsteady aerodynamic loading and dynamic structural responses.For offshore wind turbines,hydrodynamic forces are exerted to the turbine foundation in addition to the aerodynamic forces and structural responses.Offshore wind farm development trends towards larger turbine sizes.The latest generation of offshore wind turbines has rotor diameters up to 170 m and rated power up to 7 MW,while 10—20 MW machines are currently in the development phase.It is the increasing size of the wind turbine that makes the unsteady and dynamic loads more difficult to be determined and therefore the wind turbine design more challenging.

        To meet the national strategic requirements in wind energy,a project of Key Mechanical Issues and Design of Large Scale Wind Turbine was funded by the National Basic Research Program (known as the″973″Program in China) in 2014,undertaken by a team of 30 from six Chinese institutions,led by Prof.Wang Tongguang as the Chief Scientist.This project focuses on the following three key issues in large scale wind turbine mechanics: (1) wind turbine 3D rotational aerodynamics in complicated circumstances,(2) wind turbine aeroelasticity and hydrodynamics and their coupling effects in complicated circumstances,and (3) wind turbinesupport and foundation structural dy-namics in complicated offshore circumstances.A high-performance multi-megawatt wind turbine will be designed based on the studies in this project,where six workpackages are included: (1) Study of unsteady aerodynamic mechanism and high-accuracy numerical simulation for wind turbine; (2) Study of the aeroelastic mechanism and structural dynamics of nonlinear large deformation of wind turbine; (3) Study of offshore floating wind turbine dynamics under Wind,Ocean Wave,and Ocean Current; (4) Study of dynamics and safety for bottom-fixed offshore wind turbine foundation; (5) Experimental study of wind turbine flow structure and aerodynamics-hydrodynamics-Structure Coupling; (6) Study of comprehensive Mechanical Analysis and Integrated Optimization of High-Performance wind turbine.

        This special issue of Wind Energy contains a collection of articles documenting recent research mainly supported by the″973″Project.Included in this collection are works that are computationally focused on as well as those that are experimentally oriented,involving wind turbine aerodynamics,hydrodynamics,structural dynamics,structural design,fluid-structure interaction,fatigue assessment,and multi-objective optimization design,etc.Vigorously pursued,these and similar research efforts will provide enhanced analysis and design tools that will,in turn,usher in future wind energy machines of unprecedented size and efficiency.

        Wang Tongguang,Gust Editor

        Nanjing University of Aeronautics and Astronautics

        Nanjing,210016

        China

        Jan.,2016

        人人添人人澡人人澡人人人人| 亚州终合人妖一区二区三区| 亚洲成av人片天堂网无码| 色一情一乱一伦一区二区三区日本 | 朝鲜女人大白屁股ass| 婷婷综合五月| 自拍偷自拍亚洲精品播放| 国产一区二区三区四区五区vm| 亚洲av永久无码精品网站| 国产无遮挡又黄又爽高潮| 日本在线一区二区三区不卡| 亚洲人成网址在线播放| 久久精品国产99精品九九| 亚洲一区二区三区在线更新| 日本熟妇另类一区二区三区| 伊人久久大香线蕉亚洲五月天 | 日韩中文字幕不卡网站| 成人免费播放片高清在线观看| 青青草 视频在线观看| 色一情一乱一伦一区二区三区日本| 精品一区二区三区免费爱| 老岳肥屁熟女四五十路| 风流老太婆大bbwbbwhd视频| 永久黄网站色视频免费| 国产免费三级三级三级| 丰满人妻中文字幕一区三区| 免费无遮挡禁18污污网站| 亚洲AV永久青草无码性色av| 长腿丝袜在线观看国产| 亚洲av无码日韩av无码网站冲| 香蕉久久久久久久av网站| 亚洲夫妻性生活视频网站| 久久99热只有频精品8国语| 精品人妻中文无码av在线| 久久久久久中文字幕有精品| 成人性生交大片免费看激情玛丽莎| 亚洲成av人片乱码色午夜| 国产黄a三级三级三级av在线看 | av天堂在线免费播放| 强开小婷嫩苞又嫩又紧视频| 久久精品久久久久观看99水蜜桃|