|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Interaction between the atmospheric boundary layer and a standalone wind turbine in Gansu—Part II: Numerical analysis显示文摘 | Zhi Zheng ZhiTeng Gao DeShun Li RenNian Li Ye Li QiuHao Hu WenRui Hu | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，9： | 7 |
| 2 | Interaction between the atmospheric boundary layer and a standalone wind turbine in Gansu—Part I: Field measurement显示文摘 | De Shun Li Tao Guo Yin Ran Li Jin Sen Hu Zhi Zheng Ye Li Yu Jia Di WenRui Hu RenNian Li | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，9： | 6 |
| 3 | A nonlinear model for aerodynamic configuration of wake behind horizontal-axis wind turbine显示文摘Determination of the aerodynamic configuration of wake is the key to analysis and evaluation of the rotor aerodynamic characteristics of a horizontal-axis wind turbine. According to the aerodynamic configuration, the real magnitude and direction of the onflow velocity at the rotor blade can be determined, and subsequently, the aerodynamic force on the rotor can be determined. The commonly employed wake aerodynamic models are of the cylindrical form instead of the actual expanding one. This is because the influence of the radial component of the induced velocity on the wake configuration is neglected. Therefore, this model should be called a 'linear model'. Using this model means that the induced velocities at the rotor blades and aerodynamic loads on them would be inexact. An approximately accurate approach is proposed in this paper to determine the so-called 'nonlinear' wake aerodynamic configuration by means of the potential theory, where the influence of all three coordinate components of the induced velocity on wake aerodynamic configuration is taken into account to obtain a kind of expanding wake that approximately looks like an actual one. First, the rotor aerodynamic model composed of axial (central), bound, and trailing vortexes is established with the help of the finite aspect wing theory. Then, the Biot-Savart formula for the potential flow theory is used to derive a set of integral equations to evaluate the three components of the induced velocity at any point within the wake. The numerical solution to the integral equations is found, and the loci of all elementary trailing vortex filaments behind the rotor are determined thereafter. Finally, to formulate an actual wind turbine rotor, using the nonlinear wake model, the induced velocity everywhere in the wake, especially that at the rotor blade, is obtained in the case of various tip speed ratios and compared with the wake boundary in a neutral atmospheric boundary layer. Hereby, some useful and referential conclusions are offered for the aerodynamic computation and design of the rotor of the horizontal-axis wind turbine. | Deshun LI Tao GUO Rennian LI Congxin YANG Zhaoxue CHENG Ye LI Wenrui HU | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，9： | 1 |
| 4 | Parametric control of the hydraulic machinery impeller based on free-form deformation 显示文摘 | Zhang Renhui Yang Junhu Li Rennian | 2012 | Procedia Engineering2012，31，： | 1 |
| 5 | Expression of stem cell markers and transcription factors during the remodeling of the rat pancreas after duct ligation显示文摘 | Katharina Peters Roswitha Panienka Jinming Li Günter Kl?ppel Rennian Wang | 2005 | Virchows Archiv2005，，1： | 1 |
| 6 | Effects of the particle Stokes number on wind turbine airfoil erosion显示文摘Under natural conditions, wind turbines are inevitably eroded by the action of sand-wind flow. To further investigate the effects of dust drift on the erosion of the wind turbine blades in sand-wind environments, the effects of the wind velocity, particle diameter, and particle density on the erosion of wind turbine airfoils are studied, and the effects of the particle Stokes number on the airfoil erosion are discussed. The results show that, when the angle of attack(AOA) is 6.1°, there will be no erosion on the airfoil surface if the particle Stokes number is lower than 0.013 5, whereas erosion will occur if the particle Stokes number is higher than 0.015 1. Therefore, there exists a critical range for the particle Stokes number. When the particle Stokes number is higher than the maximum value in the critical range, airfoil erosion will occur. The result is further confirmed by changing the particle diameter, particle density, and inflow speed. It is shown that the erosion area on the airfoil and the maximum erosion rate are almost equal under the same particle Stokes number and AOA. The extent of airfoil erosion increases when the particle Stokes number increases, and the critical particle Stokes number increases when the AOA increases. Moreover, the geometric shape of the airfoil pressure surface greatly affects the airfoil erosion, especially at the curvature near the leading edge. | Deshun LI Zhenxi ZHAO Yinran LI Qing WANG Rennian LI Ye LI | 2018 | Applied Mathematics and Mechanics(English Edition)2018，39，5： | 1 |
| 7 | Field experiment of blade surface pres- sure of a HAWT 显示文摘 | LI I~shun LI Rennian | 2013 | Applied Mechanics and Materials2013，29，1294： | 1 |
| 8 | Numerical Simulation of Wind Turbine Wake Characteristics in Uniform Inflow显示文摘Flow field around a two-bladed horizontal-axis wind turbine(HAWT)is simulated at various tip speed ratios to investigate its wake characteristics by analyzing the tip and root vortex trajectories in the nearwake,as well as the vertical profiles of the axial velocity.Results show that the pitch of the tip vortex varies inversely with the tip speed ratio.Radial expansion of the tip vortices becomes more obvious as the tip speed ratio increases.Tip vortices shed not exactly from the blade tip but from the blade span of 96.5%—99%radius of the rotor.The axial velocity profiles are transformed into V-shape from W-shape at the distance downstream of eight rotor diameters due to the momentum recovery. | Li Rennian Ma Ruijie Li Deshun Li Yinran Wang Chengze | 2016 | Transactions of Nanjing University of Aeronautics and Astronautics2016，33，1： | 1 |
| 9 | Critical Stokes Number for Gas-Solid Flow Erosion of Wind Turbine Airfoil显示文摘Wind turbine blades are inevitable to be eroded in wind-sand environment,so it is crucial to identify the flow conditions under which the erosion happens.Here,the effect of the sand diameter on wind turbine airfoil is first investigated.When the sand diameter is less than 3μm,the sands will bypass the airfoil and no erosion occurs.When the sand diameter is larger than 4μm,the sand grains collide with the airfoil and the erosion happens.Thus,there must be a critical sand diameter between 3μm and 4μm,at which the erosion is initiated on the airfoil surface.To find out this critical value,aparticle Stokes number is introduced here.According to the range of the critical sand diameter mentioned above,the critical value of particle Stokes number is reasonably assumed to be between 0.007 8and 0.014.The assumption is subsequently validated by other four factors influecing the erosion,i.e.,the angle of attack,relative thickness of the airfoil,different series airfoil,and inflow velocity.Therefore,the critical range of Stokes number has been confirmed. | Li Deshun Gong Yuxiang Li Rennian Li Yinran Ma Ruijie | 2016 | Transactions of Nanjing University of Aeronautics and Astronautics2016，33，1： | 1 |
| 10 | Parameter equation study for screw centrifugal pump显示文摘 | Xiaorui Cheng Rennian Li | 2012 | Procedia Engineering2012，，： | 1 |
| 11 | Parameter equation study for screw centrifugal pump显示文摘 | Cheng Xiaorui Li Rennian | 2012 | Procedia Engineering2012，31，： | 1 |
| 12 | Numerical and experimental study of the effects of wind turbine operation on sand-dust transport characteristics显示文摘Given factors such as reduced land availability for onshore wind farms,wind resource enrichment levels,and costs,there is a growing trend of establishing wind farms in deserts,the Gobi,and other arid regions.Therefore,the relationship between sanddust weather environments and wind turbine operations has garnered significant attention.To investigate the impact of wind turbine wakes on sand-dust transportation,this study employs large eddy simulation to model flow fields,coupled with an actuator line model for simulating rotating blades and a multiphase particle in cell model for simulating sand particles.The research focuses on a horizontal axis wind turbine model and examines the motion and spatiotemporal distribution characteristics of four typical sizes of sand particles in the turbine wake.The findings reveal that sand particles of varying sizes exhibit a spiral settling pattern after traversing the rotating plane of wind turbine blades,influenced by blade shedding vortex and gravity.Sand particles tend to cluster in the peripheries of the vortex cores of low vorticity in the wind turbine wake.The rotation of wind turbines generates a wake vortex structure that causes a significant clustering of sand particles at the tip vortex.As the wake distance increases,the particles that cluster at the turbine's tip gradually spread outward to approximately twice the rotor diameter and then begin to mix with the incoming flow environment.Wind turbines have a noticeable impact on sand-dust transportation,hindering their movement to a significant extent.The average sand-blocking rate exhibits a trend of initially increasing and then decreasing as the wake distance increases.At its peak,the sand-blocking rate reaches an impressive 67.55%.The presence of wind turbines induces the advanced settling of sand particles,resulting in a“triangular”distribution of the deposition within the ground projection area of the wake. | Gaosheng Ma Hong Han Ye Li Deshun Li Yan Wang Ning Fu Quan Zheng Rennian Li | 2024 | Science China(Physics,Mechanics & Astronomy)2024，67，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员