大型碟式太阳能钢构机架平均风荷载及绕流特性研究

发布时间：2018-04-23 09:13

本文选题：太阳能 + 钢构机架　；参考：《振动与冲击》2014年24期

【摘要】：基于Fluent 6.3软件平台,选用Reynolds时均的Realizable k-ε湍流模型对复杂碟式机架进行三维定常风场作用的数值模拟。应用带圆柱内域分区的多风向角建模方法,建立满足流场充分发展和网格独立解的计算域模型,模拟得到了45组工况的总风载荷、风压分布及绕流特性等结果。分析风载荷随工况的变化规律,并将载荷曲线同抛物雷达天线风洞试验结果进行定性的对比分析,验证了模拟结果的合理性。采用因次方法探讨了聚光器镜面风载荷占机架总风载荷的比值,给出了典型工况聚光器体型系数分布及各分区载荷极值,进一步分析流场绕流特性揭示了载荷产生的机制,所得结论为碟式光热太阳能整机结构抗风设计提供依据。
[Abstract]:Based on the Fluent 6.3 software platform, the Realizable k- 蔚 turbulence model of Reynolds is used to simulate the three-dimensional steady wind field of the complicated disk frame. Using the multi-wind direction modeling method with cylindrical inner domain partition, a computational domain model satisfying the full development of the flow field and the independent solution of the grid is established. The results of the total wind load, wind pressure distribution and flow characteristics around 45 working conditions are obtained by simulation. The variation law of wind load with working condition is analyzed, and the rationality of simulation results is verified by comparing the load curve with the results of parabolic radar antenna wind tunnel test qualitatively. In this paper, the ratio of the mirror wind load to the total wind load on the frame of the concentrator is discussed by using the dimensional method. The distribution of the shape coefficient of the concentrator and the extreme values of the load in each zone are given, and the mechanism of the load generation is revealed by further analyzing the characteristics of the flow around the flow field. The conclusion provides the basis for the wind resistance design of the whole structure of the disc photothermal solar machine.
【作者单位】：湖南科技大学机械设备健康维护省重点实验室;湖南科技大学机电工程学院;
【基金】：国家自然科学基金(51275166) 湖南省省市联合基金资助(11JJ8006) 湖南省战略性新型产业重大科技攻关项目(2011GK4058) 湖南科技大学研究生创新基金项目(S130019)
【分类号】：TU312.1

【参考文献】