定日镜风压分布变化规律及干涉效应

IF 0.7 Q4 ENGINEERING, MECHANICAL

Journal of Vibroengineering Pub Date : 2023-08-08 DOI:10.21595/jve.2023.23251

Xuan Li, Anmin Jiang, Yanchen Dong, Q. Xiong, Feifei Wang

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引用次数: 0

摘要

由于定日镜的特殊形状，定日镜不同于普通的低矮建筑。对定日镜模型进行了风洞压力试验，定日镜的方位角范围在0°至180°之间，仰角范围在0度至90°之间。获得镜面板上每个测量点的风压时间历程。在此基础上，得到了镜面板在典型工况下的平均风压分布，进而得到了所有工况下以及相应工况和测点下平均风压的最大（最小）值。然后选取10个具有代表性的测点，分别研究风压随风向角和桨距角的变化规律，得到10个测点在所有工况下的平均风压变化规律。最后，研究了定日镜平均风压的干扰效应，得到了平均风压干扰效应的变化规律，得到了干扰效应的最大值、最小值及相应的工况。结果表明，定日镜在所有工况下的平均风压最大值出现在镜板下边缘的测量点和工况15-60（风向角-仰角），最小值出现在镜面左上角的测量点，工况150-20。10个测点在所有工况下的平均风压变化规律相似，测点的位置对所有工况下平均风压的变化规律影响不大。测量点的位置只影响最大值和最小值的工作条件。得到了定日镜最不利工况下的平均风压分布，得到了干扰效应的最大（最小）值和相应的工况。可供结构设计和研究参考。

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Wind pressure distribution variation law and interference effect of heliostats

The heliostat is different from the ordinary low building because of the special shape of the heliostat. The wind tunnel pressure test is carried out the model of heliostats in the range of azimuth angles are between 0° to 180° and the range of elevation angles are between 0° to 90. The wind pressure time history of each measuring point on the mirror panel are obtained. On this basis, the mean wind pressure distribution of the mirror panel under typical working conditions is obtained, and then the maximum (minimum) value of the mean wind pressure under all working conditions and corresponding working conditions and measuring points are obtained. Then 10 representative measuring points are selected to study the variation law of wind pressure with wind direction angle and pitch angle respectively, and then the variation law of the mean wind pressure of 10 measuring points under all working conditions is obtained. Finally, the interference effect of the mean wind pressure of heliostats is studied, and the variation law of the interference effect of the mean wind pressure is obtained, and the maximum value, minimum value and corresponding working conditions of the interference effect are obtained. The results show that the maximum value of the mean wind pressure of heliostats under all working conditions is appeared at the measurement point of the lower edge of the mirror panel and on working condition 15-60 (wind direction angle - elevation angle), and the minimum value is appeared at the measurement point of the upper left corner of the mirror panel and on working condition 150-20. The variation law of the mean wind pressure of 10 measuring points under all working conditions is similar, and the position of measuring points has little effect on the variation law of the mean wind pressure under all working conditions. Only the working condition of the maximum value and minimum value are affected by the position of the measuring points. The mean wind pressure distribution under the most unfavorable working condition of heliostats is obtained, the maximum (minimum) value of the interference effect and corresponding working conditions are obtained. Which can be a reference for structural design and research.

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来源期刊

Journal of Vibroengineering 工程技术-工程：机械

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Journal of VIBROENGINEERING (JVE) ISSN 1392-8716 is a prestigious peer reviewed International Journal specializing in theoretical and practical aspects of Vibration Engineering. It is indexed in ESCI and other major databases. Published every 1.5 months (8 times yearly), the journal attracts attention from the International Engineering Community.