Shape effects on aerodynamic loading of heliostats

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL

Mechanics & Industry Pub Date : 2020-11-27 DOI:10.1051/meca/2020086

H. Merarda, M. Aksas, T. Andrianne

引用次数: 2

Abstract

The effect of the shape of the mirror of a heliostat is studied through wind tunnel tests in uniform smooth and turbulent flow conditions. Three shapes are investigated: square (reference case), octagonal and circular geometries. The forces and moments are measured on reduced scale models of heliostats in low, medium and strong turbulence wind conditions in a uniform wind profile. The turbulence intensity of the flow is adjusted in the wind tunnel test section by the adjunction of passive grids upstream the model. The experimental results are presented for several elevation and azimuth angles. The results showed that: in smooth flow conditions, the geometry of the mirror has very limited effect on the mean force coefficient, while impacting the fluctuating part of the aerodynamic loads. In turbulence flow conditions, the circular mirror/panel is advantageous for the aerodynamic design of the elevation drive and mirror support structure.

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定日镜气动载荷的形状影响

通过风洞试验，研究了匀流和紊流条件下定日镜形状对定日镜形状的影响。研究了三种形状:正方形(参考案例)、八角形和圆形几何形状。在均匀风廓线低、中、强湍流条件下的缩尺定日镜模型上测量了定日镜的力和力矩。在风洞试验段，通过在模型上游附加被动栅格来调节气流的湍流强度。给出了几种仰角和方位角的实验结果。结果表明:在平稳流动条件下，反射镜的几何形状对平均力系数的影响非常有限，但对气动载荷的波动部分有影响。在紊流条件下，圆形镜面/面板有利于仰角驱动和镜面支撑结构的气动设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechanics & Industry ENGINEERING, MECHANICAL-MECHANICS

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： An International Journal on Mechanical Sciences and Engineering Applications With papers from industry, Research and Development departments and academic institutions, this journal acts as an interface between research and industry, coordinating and disseminating scientific and technical mechanical research in relation to industrial activities. Targeted readers are technicians, engineers, executives, researchers, and teachers who are working in industrial companies as managers or in Research and Development departments, technical centres, laboratories, universities, technical and engineering schools. The journal is an AFM (Association Française de Mécanique) publication.