复杂地形下基于计算流体动力学的风速比计算  

Computational Fluid Dynamic Approach to Calculate Wind Speed Ratio over Complex Terrain

作　　者：肖凯[1] 赵子涵 罗啸宇 李朝 钟继 肖仪清 XIAO Kai;ZHAO Zi-han;LUO Xiao-yu;LI Chao;ZHONG Ji;XIAO Yi-qing(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd,Guangzhou 510080,China;Department of Civil Engineering and Environment,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China)

机构地区：[1]广东电网公司电力科学研究院,广州510080 [2]哈尔滨工业大学(深圳)土木与环境工程学院,深圳518055

出　　处：《科学技术与工程》2018年第33期1-6,共6页Science Technology and Engineering

基　　金：广东电网有限责任公司科技项目(GDKJQQ20153009)资助

摘　　要：为解决复杂地形环境中,输电塔线风荷载计算的地形修正系数选取问题,基于计算流体动力学(computational fluid dynamic,CFD)方法,提出了一种以无量纲风速比为输出的数值计算方法。该方法参考COST Action 732建议的风环境模拟指导准则,对CFD中复杂地形的计算域选取、边界条件定义方式作出改进,使其能够适用于大规模批量计算。围绕Askervein山丘及中国沿海地区的一处复杂地形,结合部分风洞试验、现场实测及参考COST Action 732准则获得的风速比数据,验证了数值模拟方法的合理性。结果表明,采用该风速比计算方法,能准确考虑地形、地貌对输电塔线工作高度范围内的风加速比及风剖面造成的影响,该方法的实施为复杂地形风速比数据库的建立、输电塔线的防风加固及风致灾损事故分析奠定基础。In order to correctly consider the topographic influence during the designing of transmission line-tower system,the numerical simulation approach based on computational fluid dynamics(CFD)has been proposed by selecting the wind speed ratio as output.Taking the COST Action 732 best practice guideline for CFD simulation as reference,the appropriate selection of terrain domain and boundary conditions have been discussed.This method is designed to realize the multiple batches calculation based on the developing of supercomputer.The international collaboration project Askervein Hill has been adopt to justify the calculation performance.Furthermore,the more rugged terrain located in the South China Sea is also introduced to distinguish the difference between the improvement calculation approach and the traditional COST Action 732 suggested results.Both the comparison of wind speed ratio and normalized wind profile show the good performance of this efficient calculation approach with the changing of wind direction.The realization of the method discussed lays the foundation for the establishment of wind speed ratio database around complex terrain and the reinforcement of structure at extreme weather condition.

关 键 词：输电塔线 复杂地形 计算流体动力学 风速比 

分 类 号：O351.2[理学—流体力学]