摘要
定日镜群是塔式太阳热能发电站的主要设备,同时也是发电站的主要投资部分,其造价约占整个发电站总造价的一半以上。自从塔式太阳能发电站出现,定日镜的抗风问题就是设计中的难题,虽然可以采用风洞试验方法研究有限数量的定日镜的风效应,但对于数以百计的定日镜群风效应采用其风洞试验方法和一般的数值模拟方法也无能为力。为了研究这种大规模定日镜群的风环境,利用Fluent15.0软件为平台,以国家级超级计算中心为依托,应用超级计算技术,建立了定日镜群的数值模拟模型,采用实用的非结构化网格划分方法,根据实际情况设置了定日镜群所处边界层的入口、出口和壁面等条件,采用标准k-ε模型模拟了定日镜群在仰角为30°时的工作情况,计算了大气边界层中定日镜群在典型来流风向条件下的风速分布和风压分布。计算结果表明,改变流场方向对定日镜群的风速和风压的分布影响较明显。
The heliostat group is the main equipment of a tower solar thermal power station and its main investment is about half of the total cost of the entire power station.Since the tower solar power station appeared,the wind resistance of heliostat had been a problem to the stations design.Although the wind tunnel test can be used to study some limited heliostat wind effects,it is incapable for the wind effects of hundreds of heliostat groups,so is the general numerical simulation methods.In order to study the wind environment around the heliostat group,the numerical model of the heliostat group is established by using the supercomputing technology based on Fluent 15.0 software and the national supercomputing center.Using the practical nonstructural meshing method,the conditions such as entrance,exit and wall of the boundary layer of the heliostat group are set according to the actual situation.The standardκ-εmodel is used to simulate the working condition of the heliostat group at the angle of 30°and the distribution of atmospheric boundary wind speed and wind pressure of the heliostat group in typical flow directions.The results show that the direction of the flow field has apparent influence on the wind speed and wind pressure distribution of the heliostat group.
作者
马瑞霞
李正农
MA Rui-xia;LI Zheng-nong(Key Laboratory of Building Safety and Efficiency of the Ministry of Education,Hunan University,Changsha 410082,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2018年第4期1338-1349,共12页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51278190)
关键词
超级计算
CFD
定日镜群
流场特性
supercomputing
Computational Fluid Dynamics
heliostat group
flow field features
