倾斜侧壁正八边形天线罩风载特性研究

风载是综合集成桅杆复合材料天线罩所受的主要载荷之一,研究天线罩的风载特性将对复合材料天线罩的结构设计具有重要指导意义。采用试验和数值模拟的方法对倾斜侧壁正八边形天线罩的风载特性进行研究,分析天线罩表面平均压力系数和脉动压力系数的周向分布规律,以及Strouhal数(St数)随雷诺数(Re数)和风向角的变化规律,并将计算结果与试验结果进行比较分析。研究结果表明:平均压力系数和脉动压力系数沿周向分布变化较大,不同风向角下St数随Re的增加趋于稳定值,平均压力系数和脉动压力系数计算值与试验值基本相近。

Experimental and Numerical Investigation of the Wind Load Characteristics of an Oblique Sidewall Regular Octagon Radome

The wind load is one of the main loads born by the composite radome on the integrated mast. Research on the wind load characteristics of the radome is of great significance to the structural design of the composite radome. In this paper, both wind tunnel experiments and numerical simulations are performed to analyze the wind load characteristics of an oblique side-wall regular octagon radome. Particularly, the dis- tribution of the average pressure coefficient and fluctuating pressure coefficient in the circumference direc- tion are investigated. In addition, the variation of the Strouhal number along with the Reynolds number and the wind angle are analyzed. The results are seen to be consistent with field data and show that the distribution of the pressure coefficients vary considerably and the Strouhal number tends to be stabilized with the increase of the Reynolds number under different wind angles.