大雷诺数下串列方柱的PIV试验研究
PIV Experimental Investigation of Series Parallel Column with High Reynolds Number
DOI: 10.12677/MET.2020.93026, PDF,    科研立项经费支持
作者: 王 宾：四川省水利职业技术学院，四川 成都；流体及动力机械教育部重点实验室，四川 成都；宋文武*, 符 杰, 石建伟, 万丽佳：流体及动力机械教育部重点实验室，四川 成都；西华大学能源与动力工程学院，四川 成都
关键词: 串列方柱；绕流流场；PIV测量；雷诺数；风洞实验；Tandem Column； Flow around the Flow； PIV Measurements； the Reynolds Number； Wind Tunnel Experiment
摘要: 为了研究机械结构以及建筑物周围的流场特性，减小工程设计不当造成的损失。采用粒子图像测速设备PIV，对不同间距下的串列方柱，分别进行雷诺数为6.8 × 103、1.4 × 104、2.2 × 104、3.42 × 104的方柱绕流风洞实验，研究了串列方柱在大雷诺数下，方柱非定常绕流的流场特征和斯特罗哈数的变化特性。结果表明，在大雷诺数下，PIV试验能清晰观察到下游方柱的非定常流场特征，时均流场中距离方柱2倍间距以及瞬时流场中距离方柱3.5间距的范围内，受到上游方柱干扰较大，在小于3.5倍间距时，工程中应考虑上游的干扰，进行合理结构设计；下游方柱斯特罗哈数接近于常值0.12；在流体机械及建筑工程中结构的设计有着重要指导意义。
Abstract: In order to study the mechanical structure and the characteristics of the flow field around the building to reduce the loss caused by improper engineering design. Particle Image Velocimetry (PIV) was used, under different working conditions in tandem column. The wind tunnel experiments with Reynolds numbers of 6.8 × 103, 1.4 × 104, 2.2 × 104 and 3.42 × 104 were carried out. The flow field characteristics and St characteristic of unsteady flow around the square column under large Reynolds number are studied. The results demonstrate that under the large Reynolds number, the unsteady flow field characteristics of the downstream square column can be clearly observed in the PIV test. The time-averaged flow field in the distance from the square column 2D and instantaneous flow field in the range of 3.5D from the square column, the interference from the upper side column is larger. In less than 3.5D, when the project should consider the upstream interference, a reasonable structural design. The downstream column St is on the brink of a constant value of 0.12. In fluid machinery and construction design of the structure has important guiding significance.
文章引用：王宾, 宋文武, 符杰, 石建伟, 万丽佳. 大雷诺数下串列方柱的PIV试验研究[J]. 机械工程与技术, 2020, 9(3): 244-252. https://doi.org/10.12677/MET.2020.93026

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