摘要
针对地形及城市建筑屋顶风能情况复杂多变的问题,探究入流条件对屋顶风力机输出功率的影响.依据3种典型的城市及郊区地表粗糙度,拟合对应的指数、对数及半对数入流风剖面.选取自制S翼型300 W水平轴风力机,安装于平屋顶合适的位置,采用User Defined Functions接口分别加载3种入流条件,对屋顶流场湍流特性及风轮输出功率进行数值计算.对比分析发现:城市郊区地形的指数入流下建筑屋顶加速效果较小,湍流强度大,不宜安装风力机;城市市区地形的对数入流下风速加速效果最明显,风轮输出功率较高,但其屋顶流场分离、阻滞和湍流程度较大,湍流强度也较大,风力机安装的适宜位置和台数将减少,且存在结构破坏和成本增加等问题;高大建筑城市市区地形的半对数入流下的流场分离、速度阻滞和湍流强度较小,建筑集风效果较明显,适宜安装多台风力机,并可避免风力机结构破坏等问题.
In the light of the complex and variable of terrain and wind energy on the the city building, the index, logarithmic and semilogarithmie wind profiles were established according to 3 kinds of typi- cal surtaee roughness of urban and suburban to explore the influence of inflow c.ondition on output po- wer of roof wind turbine. An S airfoil horizontal axis wind turbine was selected as the calculation model, which was mounted at the appropriate location on the flat roof. User Defined Functions were used to load three kinds of inflow conditions, and the turbulence eharaeteristic, s of the flow field and the output power of the wind turbine were numerically calculated. The results show that under the imiex, the ac- celeration effect is smaller and the turbulence intensity is higher, not suitable for wind turbine installa-tion. Although the power of wind turbine is higher under logarithmic inflow, turbulence intensity is bigger, the number of wind turbine installation and appropriate location will be reduced, and there exi- st the problems such as structural damage and cost increase. The flow separation, speed block and the turbulence intensity are all small under semi logarithmic inflow, the building wind-collecting effeet is obvious, which is suitable to install more wind turbines, and can avoid the damage of wind turbine structurc.
作者
景坤瑶
汪建文
张立茹
贺玲丽
JING Kunyao WANG Jianwen ZHANG Liru HE Lingli(College of Energy and Power Engineering, Inner Mongolia University of Technology,Hohhot, Inner Mongolia 010051 , China Key Laboratory for Wind and Solar Power Energy Utilization Technology, Ministry of Education and Inner Mongolia Constru,：tion, Hohhot, Inner Mongolia 010051, China)
出处
《排灌机械工程学报》
EI
CSCD
北大核心
2017年第4期340-344,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
内蒙古自然科学基金重大资助项目(2016ZD04)
内蒙古工业大学科学研究项目(ZD201407
ZD201404)
关键词
风力机
屋顶流场
入流条件
湍流强度
输出功率
wind turbine
roof flow field
inflow conditions
turbulence intensity
output power
