搜索结果: 121-135 共查到“工学 wind”相关记录170条 . 查询时间(0.201 秒)
基于发电厂的风力发电机系统优化设计（Optimal Design of Wind Energy Conversion System Based on Power Factory）
风力发电机组 伸缩式叶片 优化
2009/8/11
提出一种基于发电厂的风力发电机设计理念，以风电场年发电量和发电质量作为优化目标，采用伸缩式叶片结构，在低风速下伸展叶片以提高风机输出功率，在高风速下收缩叶片，结合变桨实现输出功率调节；将额定风速、伸展时最大叶片长度、收缩时最小叶片长度和叶片中心半径作为优化变量，建立风机系统优化模型，运用遗传算法获取风机最优设计参数。结合风机设计实例，验证了风机系统优化设计的可行性。
基于滑移网格的垂直轴风力机非定常数值模拟（Numerical Simulation on Unsteady Rotated Flow of a Vertical Axis Wind Turbine Based on Moving Meshes）
垂直轴风力机 滑移网格 多流管模型
2009/8/11
采用滑移网格技术对直叶片垂直轴风力机进行了非定常数值模拟，得到尾流速度、特定过流断面的速度分布规律，并与经典的多流管理论计算出的尾流速度、特定过流断面速度进行了对比，数值模拟结果与理论计算值吻合较好。结果表明，采用滑移网格技术对直叶片垂直轴风力机进行非定常的数值模拟能够较好地反映流场特性。
VALIDATION OF THE COMPUTATIONAL FLUID DYNAMICS (CFD) METHOD FOR PREDICTING WIND FLOW AROUND A HIGH-RISE BUILDING (HRB) IN AN URBAN BOUNDARY LAYER CONDITION
CFD High-Rise residential building Urban wind
2010/9/28
Virtual Experiments or, more specifically, the Computational Fluid Dynamics (CFD) method have been used in numerous airflow studies. Most CFD code providers claim that their software can simulate and ...
A wind energy system transforms the kinetic energy of wind into mechanical or electrical energy that can be harnessed for practical use. Mechanical energy is most commonly used for pumping water in ru...
Power Distortion Issues in Wind Turbine Power Systems Under Transient States
Power quality power system harmonics time-frequency analysis
2009/7/28
In this paper time-frequency methods have been investigated for complex investigations of transient states in wind power plants. Application of parallel processing in time and frequency domain brought...
Wind Power, Distributed Generation: New Challenges, New Solutions
Wind generation distributed generation computational intelligence
2009/7/28
This paper discusses some issues related with the growing importance of wind power and in modern power systems and some challenges raised by the emergence of distributed generation, and how computatio...
2009第一届世界非并网风电与能源大会world Non-Grid-Connected Wind Pwoer and Energy Conference（）
2009 第一届 世界非并网 风电 能源
2009/7/9
为加强国际合作，促进世界各国风能和非并网风电研究领域的学术交流，世界风能学会、中国能源学会、IEEE国际电力与能源工程协会、中国可再生能源学会、江苏省宏观经济研究院联合举办的“2009世界非并网风电与能源大会”将于2009年09月24-26日在中国南京举行。征文范围1、风电产业与政策2、海上风电场技术等。
WIND ENERGY RESOURCES IN BOSNIA AND HERZEGOVINA
wind energy research potential Bosnia and Herzegovina
2010/10/11
Bosnia & Herzegovina state has good potentials for generation of electric power. It applies, first of all, to its water and coal potentials. In addition to this, Bosnia & Herzegovina has good potentia...
A Study on Critical Wind Velocity of a Ro-Ro Passenger Ship Equipped with Side Thrusters in a Port
Critical Wind Velocity Maneuvering Simulation Safety in a Port
2009/5/18
In this study, critical wind velocity of a Ro-Ro passenger ship equipped with side thrusters are examined. Two different methods were developed to identify the critical wind velocity. One is based on ...
Variable Rotational Speed Control for Fixed-pitch Type Wind Turbines Using LPV Techniques
Rotational Speed Fixed-pitch Type LPV
2009/4/30
In the paper, we consider the problem of variable rotational speed control for a wind turbine with the pitch fixed from the view point of scheduling by wind speed. For this problem, we apply LPV (Line...
Cruising performance of ships with large superstructures in heavy sea—1st report: Added resistance induced by wind
large superstructures in heavy sea wind MMG
2009/4/29
From economical and safety aspects the assessment of steady-state cruising performance of ships under heavy wind loading is very important. A large passenger ship and a PCC with a very large hull and ...
A New Estimation Method of Wind Forces and Moments acting on Ships on the basis of Physical Component Models
wind forces wind moments physical component models
2009/4/29
A new method to estimate longitudinal and lateral wind forces, and yaw and heel moments for ships is presented in this paper. The proposed estimation procedure is based on physical component models of...
A study on the shielding effects among wind-power generators in a floating wind farm
wind-power generators shielding effects floating wind farm
2009/4/29
In the present study, the shielding effects among the generators in an offshore floating wind farm are investigated through extensive experiments and the trade-off effects on the generation cost due t...
Free running model test on a large container ship under wind and waves at towing tank
Free running model test large container ship towing tank
2009/4/17
A ship navigating at sea is always suffered from wind and waves. The assessment of the ship speed and thrust under external forces as the wind and waves is important from economical viewpoints. Althou...
Circulation Water Tunnel Tests on Slewing Motion of a Towed Ship in Wind
towed barge Slewing Motion
2009/3/27
This paper describes circulation water tunnel tests for investigating the wind effects on the course stability of a towed barge.