【作者】 姜传忠；

【导师】 刘红军；

【作者基本信息】 哈尔滨工业大学 ， 土木工程， 2011， 硕士

【摘要】 我国70%的陆地是山区,随着我国风力发电事业的发展,必将会建立更多的山区复杂地形条件下的风力发电场。在山区由于局地环流的影响使得流经山区的气流改变方向,所以,在山区即使是相邻的两地,风速、风向以及风压也往往会有很大的差别。因此研究山区复杂地形对风场的影响具有十分重要的理论价值和社会意义。本文基于CFD数值模拟技术,对复杂山地周围的流场进行了研究。本文第一部分首先以二维典型孤立山体模型为研究对象,研究了山体坡度、山体高度以及地面粗糙度对山体周围风场的影响;本文第二部分研究了二维连续山体中不同施扰山体坡度、施扰山体高度、施扰山体和受扰山体之间的间距以及施扰山体个数对受扰山体周围风场带来的影响。本文第三部分首先以三维典型孤立山体为研究对象,研究了山体坡度对风场的影响,并与二维山体的模拟结果进行对比;然后研究了顺风向连续山体和横风向的两个连续山体构成的山隘对风场的影响;继而研究了一个由多个山体组成的复杂地形对风场的影响;最后以广东省南澳岛的东部主岛为研究对象,模拟了该处实际地形条件下不同来流方向时该地形周围风场,并通过对模拟结果分析对该地形进行初步的选址。基于对二维典型山地研究和三维典型山地对风场的研究,在盛行风向确定且平地风速达到风力机额定风速的情况下,对山体附近风场选址提出几点方案。更多还原

【Abstract】 Because of the fact that 70% of the mainland in China is mountainous and with the development of the wind power industry, there will be more and more wind farms built under the complicated terrain conditions. The direction of air current running through the mountains will be changed as the result of the local circulation, so there will be largely different wind speeds, wind directions and wind pressures even in the two adjacent regions. So it will be very significant to research on the effect of the mountainous complicated terrain conditions on the wind field.Based on the CFD numerical simulated technology, this paper studied the fluid field around complicated mountains.In the first part of the paper, a two-dimension classic isolated mountain model as the research object, study the effect of the mountain slope, the mountain height and surface roughness on the wind field around mountains. In the second part of the paper study how the slope, height, distance between mountains and numbers of the influential mountains in the two-dimension consecutive mountains influent the wind field around mountains. In the third part of the paper, a three-dimension classic isolated mountain model as the research object, study the effect of the mountain slope on the wind fields and make a comparison with the simulated results of two-dimension mountain model; then study the effect of the cordillera made up with downwind consecutive mountains and longitude consecutive mountains on the wind fields; and then, study the influence of complicated terrain conditions formed by several mountain bodies on the wind fields,at last, east main island of the Nanao Islands in Guangdong province as the research object, simulate the wind fields with different incoming flow directions under the practical terrain conditions, and make a tentative site selections under this terrain condition. According to the research of two-dimension mountain model and three-dimension model, several suggestions for site selection of the wind farm around mountains are given under the conditions that directions of the prevailing wind are made sure of and the local wind speed is the same as the rated wind speed of the wind turbines.更多还原