摘要
基于计算流体力学理论建立了塔式定日镜数值模拟模型,根据实际情况设置了定日镜所处边界层入口、出口和壁面等条件,采用标准k-ε模型模拟了6级风时常见工况下定日镜的工作情况并进行了分析。结果表明:镜面的转动显著影响周围流场的形成,不同的角度流场差异很大;随着俯仰角和方位角的变化,靠近来流部分的镜面承受较高风压,造成镜面不平衡;定日镜整体稳定性跟镜面所受合力相关,较大的合力产生较大的倾覆力矩。
This article establishes a numerical simulation model of tower heliostat based on the computational fluid dynamics theory. According to the actual situation,it uses standard k-ε model to simulate and analyze the work condition of heliostat under 6 grad wind,with the boundary layer over inlet,outlet and wall set. The results show that mirror rotation has a significant impact on the form of flow field around varying with dif- ferent angles severely. As the change of the elevation angle and azimuth angle,the mirror surface near the in- coming flow endures higher wind pressure,which causes mirror imbalance. The global stability of heliostat is related to the resultant force of mirror,and the larger resultant force led to the larger overturning moment.
出处
《绿色科技》
2014年第5期288-293,共6页
Journal of Green Science and Technology
关键词
塔式定日镜
数值模拟
风流场
风压分布
风荷载
tower heliostat
numerical simulation
airflow field
wind pressure distribution
wind load
